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February 2018

Rick receives an E-Council Teaching Award for CBE 544 (Spring 2017)!  These awards, selected entirely by the students, “are the only student-motivated, student-run, student-selected teaching awards at Princeton University”.  During the lunchtime ceremony on February 22, the award was presented to Rick by Kaichen Gu G3, Ph.D. student in group of Lynn Loo *01.

Emily Abdo joins the group for junior independent work on ROMP of monocyclic olefins (larger than cyclopentene).  Welcome aboard, Emily!

January 2018

Nick successfully defends his First Proposition, “Tie Molecules and the Deformation Mechanisms of Polyethylene”, and advances to post-Generals candidacy.  Congratulations, Nick!

Will successfully defends his Ph.D. thesis, “Thermodynamics and Mechanical Properties of Diblock Copolymers Containing Polyethylene and Polynorbornene Derivatives”, at his Final Public Oral Examination on January 24. Will will begin an appointment a National Research Council Associate at the National Institute of Standards and Technology (Gaithersburg, MD). Congratulations, Will!

Rick delivers an invited talk at the inaugural Bowei Research Conference (Beipu, Hsinchu, Taiwan).  Other invited speakers included group alumnae Lynn Loo *01 and Sheng Li *13.  See the conference program and photos here.  

December 2017

Will’s paper on “Yield Stress Enhancement in Polyethylene-Glassy Diblock Copolymers” appears in Macromolecules. For those with personal or library subscription access, the manuscript can be viewed here. Congratulations, Will!

October 2017

Adam’s paper on "Large, Reversible, and  Coherent Domain Spacing Dilation Driven by Crystallization under Soft Lamellar Confinement" appears in Macromolecules.  For those with personal or library subscription access, the manuscript can be viewed here.  Congratulations, Adam!

September 2017

Max Difazio finishes his LLP project comparing the "narrow-distribution" and "broad-distribution" methods for determining the molecular weight dependence of the intrinsic viscosity and radius of gyration of polystyrene, using multidetector gel permeation chromatography.  Good luck in your senior year at PDS, Max!

Rick presents a talk on Will’s work, "Melt Miscibility of Polyethylene with Hydrogenated ROMP Poly(x-norbornene)s", at the biennial "Advances in Polyolefins XI" workshop (Santa Rosa, CA) of the ACS Division of Polymer Chemistry.

August 2017

Michelle Quien finishes her REU project on locating the order-disorder transition temperature in block copolymers by hot-stage polarizing microscopy (see photo below), and returns to Cornell for her sophomore year.  Good luck, Michelle!

Will’s paper on "Lower Critical Ordering Transition of an All-Hydrocarbon Polynorbornene Diblock Copolymer" appears in ACS Macro Letters.  For those with personal or library subscription access, the manuscript can be viewed here.  Congratulations, Will!

Vishesh Shah finishes his LLP project on on-line measurements of the molecular weight dependence of the intrinsic viscosity and radius of gyration of polyisobutylene and ethylene-propylene copolymers, using broad-distribution polymers and multidetector gel permeation chromatography.  Good luck in your senior year at South, Vishesh!

Will’s paper on "Melt Miscibility in Diblock Copolymers Containing Polyethylene and Substituted Hydrogenated Polynorbornenes" appears in Macromolecules.  For those with personal or library subscription access, the manuscript can be viewed here.  Congratulations, Will!


June 2017

Rick again serves as a Marshal at the University’s Commencement ceremony, this year receiving a temporary promotion to the position of Associate Chief Marshal (ACM).  The ACM helps host the recipients of Honorary Degrees—see picture below of Rick with Kareem Abdul-Jabbar!

Michelle Quien (Cornell University, BSChemBioE ’21) joins the group as a PCCM Research Experience for Undergraduates (REU) participant for the summer.  Welcome aboard, Michelle!

Maxwell Difazio (Princeton Day School ’18) and Vishesh Shah (West Windsor-Plainsboro HS ’18) join the group for the summer through the Laboratory Learning Program (LLP).  Welcome aboard, Max and Vishesh!


May 2017

Michael Torre ’17 completes his B.S.E. degree, including his thesis on "Ring-Opening Metathesis Copolymerization of Bicyclic and Monocyclic Olefins", and will soon take up a position as an Engineer at Electroninks, Inc. (Austin, TX).  Congratulations and best wishes, Mike!

Steven Tsai ’17 also completes his B.S.E. degree, with a thesis on "Endo/exo Reactivity Ratios in Living Vinyl Addition Polymerization of Substituted Norbornenes", for which he shared the Air Products Outstanding Thesis Award from the Department of Chemical and Biological Engineering.  Steven will soon take up a position as an R&D Associate at Reckitt Benckiser (Montvale, NJ)—congratulations and best wishes!

April 2017

Rick, Will, Sravya, Jared, and Nick host two tables at the PCCM Dia de la Sciencia at the Princeton Public Library on April 8, where hundreds of young students and their families came to enjoy and experience a broad range of materials-science-themed activities.  This year’s special feature was outreach to the area’s Spanish-speaking community, with a bilingual translator standing by the tables to assist.  


March 2017

Adam, Will, and Rick travel to New Orleans, LA for the 2017 March Meeting of the American Physical Society.  Adam delivered a talk on "Crystal Thickening in Strongly Segregated Crystalline-Amorphous Diblock Copolymers", while Will spoke on "Melt Miscibility in Block Copolymers Containing Polyethylene and Substituted Polynorbornenes".  Rick gave an invited talk, "Orientation and Order in Shear-Aligned Thin Films of Cylinder-Forming Block Copolymer", in a session honoring the late Ed Kramer; filled in for Dane, who was snowed in back in NJ by Winter Storm Penelope, with a talk on "Location-Specific Measurements of The Glass Transition Temperature in Fluorescently Labeled Diblock Copolymers"; and hosted a table at "Lunch with the Experts" for graduate students attending the meeting.

February 2017

Adam successfully defends his Ph.D. thesis, "Structure and Property Control in Semicrystalline Polymers Through Block Copolymerization, Macromolecular Architecture, and Tacticity", at his Final Public Oral Examination on February 9.  Starting April 1, Adam will embark on an appointment as a National Research Council Research Associate at the National Institute of Standards and Technology (Gaithersburg, MD), in the Functional Polymers Group.  Congratulations, Adam—and good luck!

January 2017

First-year Ph.D. student SeongHyuk (Nick) Cho joins the group.  Welcome aboard, Nick!

Will’s paper on "Synthesis of Narrow-Distribution, High-Molecular-Weight ROMP Polycyclopentene via Suppression of Acyclic Metathesis Side Reactions" appears in ACS Macro Letters.  For those with personal or library subscription access, the manuscript can be viewed here.  Congratulations, Will!

December 2016

Adam’s paper on "Mechanical Properties of Star Block Polymer Thermoplastic Elastomers with Glassy and Crystalline End Blocks" appears in Macromolecules.  For those with personal or library subscription access, the manuscript can be viewed here.  Congratulations, Adam!

November 2016

Will and Rick attend the American Institute of Chemical Engineers Annual Meeting in San Francisco, CA.  Will presented a talk on "Enhanced Yield Strength in Polyethylene-Glassy Block Copolymers" in the "Nanoscale Structure in Polymers Session".  

October 2016

Postdoctoral associate Beomgoo Kang departs for a permanent research position at LG Chemical in Daejeon, ROK. Good luck, Beomgoo!

September 2016

The Register group welcomes two new senior thesis students this month to the lab: Michael Torre III and Steven Tsai! We look forward to working with you!

August 2016

Rick, Adam, Will, Dane, and Beomgoo attended the American Chemical Society 2016 Fall Meeting in Philadelphia, PA. Adam presented on both "Controlling the phase behavior and mechanical properties of thermoplastic elastomers via combined crystallization and vitrification" and "Maximizing the chlorosilane coupling efficiency of living anionic polymers and limiting degradation during subsequent hydrogenation." Will presented on the "Melt-miscibility in polyethylene-hydrogenated polynorbornene block copolymers," Dane talked on the "Local measurements of the glass transition temperature in fluorescently labeled n-alkyl methacrylate diblock copolymers," and Beomgoo talked on the "Synthesis of well-defined functional copolymers via living vinyl addition polymerization for biobutanol pervaporation membranes."

Rick delivers a plenary lecture on "Polymer Structure and Properties" at the decadal NSF Workshop on Frontiers in Polymer Science and Engineering (August 17-19, Arlington, VA). For the workshop's final report, outlining the current state of the field and the leading challenges and opportunities going forward, click here.

July 2016

Rick, Adam, Will, and Dane traveled to Mount Holyoke College in South Hadley, MA for the 2016 Polymer Physics Gordon Research Conference (GRC). Rick chaired the GRC and Adam chaired the Gordon Research Seminar that took place immediately prior to the GRC. Adam, Will, and Dane presented posters during the meeting. The current group members were joined by group alumni/affiliates Bryan Beckingham, Sheng Li, and Ha-Kyung Kwon.


June 2016

The Register group hosted the 23rd and final "Microsymposium" with Dr. Bob Cohen's group from MIT. It was a great experience, and members of both groups were glad that we could continue this longstanding annual tradition of sharing research presentations in a small, comfortable setting for one more year. We all wish Dr. Cohen well in his retirement!

April 2016

Rick, Beomgoo, Adam, Will, Dane, Sravya, and Jared participated in the PCCM Materials Science NanoDays at the Princeton Public Library. The day was a big success, and hundreds of young students and their families came to participate in all kinds of nanoscience-themed activities!

March 2016

Rick, Adam, Will, and Dane traveled to Baltimore, MD for the 2016 March Meeting of the American Physical Society. Rick was an invited speaker in the Dillon Medal symposium to honor Prof. Thomas Epps, where he presented a talk titled "High-Tg Polynorbornene-Based Block and Random Copolymers for Butanol Pervaporation Membranes." Adam presented on "Structure and Properties of Tactic Hydrogenated Polynorbornenes," Will gave a talk titled "Yield Stress Enhancement in Glassy-Polyethylene Block Copolymers," and Dane spoke about "Synthesis and Characterization of Fluorescently Labeled Diblock Copolymers for Location-Specific Measurements of The Glass Transition Temperature." In addition, Will presented a poster titled "Controlling Miscibility in Polyethylene-Polynorbornene Block Copolymers via Side-Group Chemistry," which was awarded first place for an outstanding poster in the Division of Polymer Physics!

January 2016

The group welcomes two new first-year graduate students, Sravya Jangareddy and Jared Klein! We wish them well as they begin their research projects.

November 2015

Dane placed 3rd in the Fall 2015 PCCM poster night, for his work titled "Synthesis and Characterization of Fluorescently Labeled n-Alkyl Methacrylate Diblock Copolymers". Great job, Dane!

Adam was selected to present in the "Excellence in Graduate Polymer Research" symposium at the American Institute of Chemical Engineers Annual Meeting in Salt Lake City. Quoting from the symposium description: "This is an honorary session consisting of talks by graduate students who have demonstrated excellence in chemical engineering research in any field regarding the area of polymer science and engineering." Adam delivered his talk, "Thermoplastic Elastomers Via Crystallization from Homogeneous Melts" on Tuesday, November 10, to a full room and receptive audience. Congratulations, Adam!

October 2015

Congratulations to Raleigh, for successfully defending his Ph.D thesis "The Orientation of Microdomains and the Progression of Shear Alignment in Block Copolymer Films: The Roles of Key Material, Film, and Process Parameters".

The group welcomes Beomgoo Kang as our new post-doctoral researcher! Beomgoo comes to the Register lab from Jimmy Mays' group at the University of Tennessee, where he worked on a wide range of copolymer chemistries and archirectures via anionic polymerization.

In work described as a "major breakthrough" by the peer-reviewers, Dong-Gyun Kim's article "Hydroxyhexafluoroisopropylnorbornene Block and Random Copolymers via Vinyl Addition Polymerization and Their Application as Biobutanol Pervaporation Membranes", was published in the October 13 issue of Chemistry of Materials. The result of a collaboration with researchers from Promerus LLC, this paper describes synthesis and performance characterization of new block and random copolymers, which are exceptionally well-suited to the recovery of n-butanol from dilute aqueous solutions, such as fermentation broth. This article was selected for the ACS Editors' Choice program, meaning that it will be open access (freely available to the general public) in perpetuity, so the link above will provide access to the article with or without a Chemistry of Materials subscription. Only one article per day, across all ACS journals, is selected as Editors' Choice, making this distinction more selective than being chosen for the journal cover. Congratulations, Dong-Gyun!

July 2015

Raleigh made the trek down to Alpharetta Georgia to begin his new career with Solvay Advanced Polymers LLC. Raleigh will return to Princeton in the Autumn to defend his thesis, but until then the group wishes him a great start as he begins the next chapter of his professional life!

May 2015

The group bids farewell to Helen, after she completed her senior thesis. Congratulations Helen, and best of luck as you start your graduate studies at Massachusetts Institute of Technology in the Fall!

April 2015

The Register lab participated in the 2015 PCCM Materials Science NanoDay. Rick gave his famous polymer basics demo, while the rest of the group set up a collection of activity stations covering "Shrinky Dink" art, smashing rubber balls frozen with liquid nitrogen, making "slime," and skewering balloons without popping.

March 2015

Rick, Raleigh, Adam, Will, and Dane all traveled to the 2015 American Physical Society March Meeting in San Antonio, TX. Raleigh presented in this year's Padden Award Symposium, a competitive session which recognizes one graduate student each year for "Excellence in Polymer Physics Research." Raleigh's talk was titled "Get in Line: Orienting Cylinders in Block Copolymer Thin Films via Shear." Raleigh also presented a poster on "Coatings with Thermally Switchable Surface Energy Produced from Block Copolymer Films." Adam gave a talk titled "Tailoring Phase Behavior and Mechanical Properties in Thermoplastic Elastomers through Block Sequence and Macromolecular Architecture." Will, attending his first APS conference, gave a presentation on "Melt-Miscibility in Block Copolymers Containing Polyethylene and Substituted Polynorbornene Blocks." Fellow APS rookie Dane also attended and presented a poster on "Liquid Substrate Effects on the Glass Transition Temperature of Nanoscopically Confined Polystyrene Spheres."  There was time for some fun in the great state of Texas as well. The current group members were joined with group alumni/affiliates So Youn Kim, Ha-Kyung Kwon, Bryan Beckingham, Matt Trawick, and Kouji Asakawa for a group dinner. It was great seeing everyone and congrats to everyone who presented at this year's APS meeting! 

February 2015

Rick traveled to Orlando, FL to present at the 2015 Smart Coatings meeting. There he gave an invited talk on "Block Copolymers: Thin Films and Thermoswitchable Surfaces".

Senior thesis student Helen Yao '15 was recently profiled in the Student Spotlight for the Princeton Institute for the Science and Technology of Materials monthly newsletter. Nice work Helen!

January 2015

Congratulations to Dane (jointly advised by Professor Rod Priestley) for successfully defending his First Prop! Dane's PhD will focus on studying the distribution of glass transition temperatures in amorphous block copolymers.

December 2014

The group welcomes new senior thesis student Su Fen. She will be synthesizing statistical copolymers of poly(styrene)-poly(hydroxyethylmethacrylate) and grafting these to silicon substrates. Her goal is to determine the factors which influence the thickness of the resulting grafted copolymer film.

November 2014

Rick and Raleigh traveled to the American Institute for Chemical Engineers annual meeting in Atlanta, GA. Raleigh presented on "Orientation of Cylinder-Forming Poly(styrene)-poly(n-hexylmethacrylate) Diblock Thin Films Pre- and Post-Shear."

October 2014

Adam and Will presented at the 2014 Princeton Chemical and Biological Engineering Graduate Student Symposium. Adam gave a talk on "Thermoplastic Elastomers with Crystallization-Driven Network Formation from Single-Phase Melts." Will presented a poster on "Melt-Miscible Block Copolymers Containing Polyethylene."

September 2014

Rick was elected as a Fellow of the American Institute of Chemical Engineers by the AIChE Board of Directors at their September meeting. As described in AIChE's Constitution and By-laws, election as Fellow—the highest grade of membership— "shall be recognition of professional attainment, and significant accomplishment in engineering." In 2008, a history of the AIChE Fellows program was written to coincide with the AIChE Centennial. Rick will be recongized at this year's AIChE Annual Meeting in Atlanta, at the Fellows Breakfast on November 18.

Raleigh received the Wu Prize of Excellence from the School of Engineering and Applied Sciences. The Wu Prize, supported by the generous donation of Sir Gordon Y.S. Wu '58, is awarded to engineering graduate students who have performed at the highest level as scholars and researchers, and who will be entering their final year of study this fall. Congrats Raleigh!

So Youn's paper "Large-Area Nanosquare Arrays from Shear-Aligned Block Copolymer Thin Films" was published in Nano Letters. Congratulations So Youn!

August 2014

Raleigh's work "Cylinder Orientation and Shear Alignment in Thin Films of Polystyrene-Poly(n-hexyl methacrylate) Diblock Copolymers" was published in Macromolecules. Congrats Raleigh!

July 2014

Rick, Raleigh, Adam, and Will travel to the Mount Holyoke College in South Hadley, MA for the 2014 Gordon Research Conference on Polymer Physics. Rick gave an invited talk on "Crystallizable Block Copolymers: Directing Crystallization via Polymer Architecture" while the students presented posters of their most recent work. In addition, Raleigh, Adam, and Will attended the affiliated Gordon Research Seminar the weekend prior to the main conference. The seminar gives graduate students and post-docs the opportunity to present their work and network prior to the main conference. There Raleigh presented on "Factors Influencing Shear Alignment of Cylinder-Forming Block Copolymer Thin Films." All of the group members in attendance really enjoyed their time there and cannot wait for the next Gordon Conference in 2016!

June 2014

Adam was awarded the 2014 Kristine M. Layn Award which recognizes outstanding performance in research (highlighted by his authorship on four peer-reviewed papers) by the end of the awardee's third year. In his nomination letter, Rick noted Adam's "dedication, creativity, determination, and eagerness to do whatever is required to advance the work." Well-deserved and congratulations Adam!

The group welcomes the Cohen group into town for the 21st (nearly annual) Cohen-Register Microsymposium.

The group is happy to welcome Leah Behar and Catherine Lee for the summer. Leah is an undergraduate chemistry major from Mars Hill University. She is participating in the Research Experience for Undergraduates (REU) program through Princeton's Center for Complex Materials (PCCM). Leah will be working with Raleigh to study the parameters which dictate the thickness of grafted copolymer thin films. Catherine is a local high school student participating in Princeton's Laboratory Learning Program. She will be working with Adam and Will to measure properties of polymers in dilute solutions.

May 2014

Former senior thesis students Siobhan, Mike, Ha-Kyung, and Andrew return for the 2014 Princeton Reunions. It was wonderful to see them. Thanks for stopping by!

Raleigh and Sahana publish their work titled "Creating Controlled Thickness Gradients in Polymer Thin Films via Flowcoating" in Langmuir

April 2014

We enthusiastically welcome new post-doc Dong-Gyun to the group! Dong-Gyun comes to us from Seoul National University in South Korea. Welcome Dong-Gyun!

Former senior thesis student, Ha-Kyung published "Polystyrene-poly(2-ethylhexylmethacrylate) block copolymers: Synthesis, bulk phase behavior, and thin film structure" in Polymer. Congratulations to Ha-Kyung and all the coauthors! What a productive year 2012-2013 was for the Register group senior thesis students. Awesome job everyone!

March 2014

Rick, Raleigh, Adam, Will, and Dane participate in the 2014 Spring Stars in Materials Science event. Learn about and see pictures of the event here.

Rick, Raleigh, and Adam head west to the 2014 APS March Meeting in Denver, CO. It was an eventful conference for the group. Rick presented Bryan's work on "Regular and Irregular Mixing in Hydrocarbon Block Copolymers" in the prestigious Dillon Medal symposium. Raleigh presented his work on "Factors Influencing Shear Alignment of Cylinder-Forming Block Copolymer Thin Films" and also his and So Youn's work on "Patterning Square and Rectangular Arrays Using Shear-Aligned Block Copolymer Thin Films." Meanwhile Adam was busy giving both a poster on "Soft Semicrystalline Thermoplastic Elastomers by Arrested Crystallization" and a talk on his, Mike's, and Andrew's work on "Counit Inclusion in Hydrogenated Polynorbornene Copolymer Crystals."

February 2014

So Youn departs the group to begin a faculty position at Ulsan National Institute of Science and Technology in Ulsan, South Korea. We are incredibly excited for So Youn and her family but we will certainly miss her here in Princeton. Congratulations So Youn! And come back to visit soon!

So Youn's paper titled "Metal-Containing Block Copolymer Thin Films Yield Wire Grid Polarizers with High Aspect Ratio" was published in Advanced Materials. Congratulations So Youn!

Adam, Will, and Raleigh participated in an outreach lunch where they networked with local area teachers. The main topic of discussion: just what is it like to be a graduate student? 

January 2014

Will has successfully defended his 1st Prop! Congratulations Will and welcome to post-generals status! Now for the easy part ... your Ph.D.

A big welcome to Dane and Helen who have recently joined the group! Dane is a first year undergraduate student who is originally from Jamaica and did his undergraduate work at City College of New York. He is being co-advised by Professor Rod Priestley and will work on understanding the glass transition in block copolymers. Helen is a Princeton junior, originally from New York City, studying chemical engineering. Helen will be using hot stage ellipsometry to measure the glass transition of polymer thin films. Best of luck to both Dane and Helen!

November 2013

So Youn and Rick head to the 2013 AIChE meeting in San Francisco, CA. So Youn will present her work on "Patterning Nano-Square Arrays Using Shear-Aligned Block Copolymer Thin Films."

Former senior thesis students Mike and Andrew published their work "Counit Inclusion in Hydrogenated Polynorbornene Copolymer Crystals" in Macromolecules. Congratulations and way to make the most out of your thesis projects!

October 2013

Raleigh and Adam participated in the 2013 Princeton Chemical and Biological Engineering Graduate Student Symposium. Raleigh presented on the "Orientation of Microdomains in Cylinder-Forming PS-PHMA Thin Films" and Adam gave a poster titled "Synthesis of Thermoplastic Elastomers with Composite Crystalline-Glassy Hard Domains."

July 2013

We would like to offer a big thanks and a fond farewell to Victoria, Vanessa, and Aditya for all of their hard work this summer. Victoria and Vanessa capped their summers with some excellent presentations of their work (Victoria's presentation, Vanessa's presentation). Best of luck with your fall semesters!

Rick welcomes current and past group members to his home for the 2013 Group BBQ (affectionately referred to by his students as the RAR-B-Q)!

June 2013

The group welcomes 3 students for the summer. Vanessa is a physics student from California State University-Northridge. She will be studying the thin film morphology of the PS-PEHMA (polystyrene-polyethylhexylmethacrylate) block copolymers synthesized by previous senior thesis student Ha-Kyung. Victoria is a chemical engineering student from Prairie View A&M University and will be synthesizing several HEMA (hydroxyethyl methacrylate) containing random copolymers which can be grafted to silica substrates as a means of controlling the substrate surface energy. Victoria and Vanessa are both participants in the Research Experience for Undergraduates program. Our third summer student is Aditya, a high school student who will be measuring how the refractive index of various polymer solutions changes with concentration. This work will be instrumental in helping us to use light scattering data for absolute molecular weight determination of our polymers. Welcome Vanessa, Victoria, and Aditya!

The group travels up to MIT in Cambridge, MA for the 2013, 20th nearly annual, Register-Cohen Microsymposium

May 2013

Congratulations and farewell to Bryan who successfully defended his Ph.D thesis titled "Mixing Thermodynamics of Block-Random Copolymers." 

Congrats to this year's senior thesis students (Siobhan, Ha-Kyung, Mike, and Andrew) for completing and defending their thesis projects! It was great having having y'all in the lab! Best wishes as you start you post-graduation plans!

April 2013

The group bids farewell to Nicolas Garcia whose research experience with the Register group has unfortunately come to an end. While here Nico worked on thin film work which included perfecting a method to float and collect free-standing polymer thin films. This has allowed for some fascinating work on stacking multiple block copolymer films and examining free standing block copolymer films. Fortunately during his stay, Nico also had some time to travel and see the local sights. Best wishes Nico and we all hope to see you again soon!

Senior thesis student Andrew Stella performs in Folklorico. Well done Andrew!

Its a big month for Bryan and the Register Lab as two papers were published this month in Macromolecules. The first is titled "Regular Mixing Thermodynamics of Hydrogenated Styrene-Isoprene Block-Random Copolymers" and the second "Architecture-Induced Microphase Separation in Nonfrustrated A-B-C Triblock Copolymers".

March 2013

Group members Rick, So Youn, Bryan, Raleigh, and Adam travel to and present at the 2013 American Physical Society March Meeting in Baltimore, MD. Rick presented his and Sheng's work on "Melt and Solid-State Structures of Polydisperse Polyolefin Block Copolymers" as part of the Dillon Medal Symposium. Bryan presented "Phase Behavior of All-Hydrocarbon 'Diblock-Random' Copolymers". Raleigh presented "Orientation of Microdomains in Cylinder-Forming PS-PHMA Thin Films" and "Creating Controlled Thickness Gradients in Polymer Thin Films via Flowcoating". Adam presented his and Sheng's work "Effect of Hydrogenation on the Glass Transition Temperatures of Novel Ring-Opened Polynorbornenes". Last but not least So Youn showed her work "Shear-alignment of Metal-containing Block Copolymer Thin Films for Nanofabrication".

The group participates in the 2nd annual Nanodays event at the Princeton Public Library. The event was spectacularly attended. Rick taught some polymer basics through some excited demos while the rest of the group manned the always popular slime station.

Bryan and Adam publish their work titled "Mixing Thermodynamics of Ternary Block-Random Copolymers COntaining a Polyethylene Block" in Macromolecules.

February 2013

Bryan Beckingham leaves Princeton to begin his post graduate work at the University of California at Berkeley. There he will be working with Rachel Segalman. Best wishes to Bryan as he begins his new adventure!

Congrats to Sheng Li for successfully defending her Ph.D. dissertation, "Structure and Properties of Novel Homopolymers and Block Copolymers Synthesized by Ring-Opening Metathesis Polymerization or Chain-Shuttling Polymerization"!

January 2013

New Ph.D. student William Mulhearn, from the University of Pennsylvania, joins the group. Welcome Will!

Nicolas Garcia, a Ph.D. student in Physics at the Universidad Nacional Del Sur working with former group member Daniel Vega, joins the group as a visiting researcher. While at Princeton he plans to perfect a technique for creating freestanding block copolymer thin films. Bienvenido Nico!

December 2012

Raleigh Davis and former group member Daniel Vega present at the Princeton Center for Theoretical Science seminar "Through the Looking Glass: a Glimpse into the Geometry and Topology of Materials."

October 2012

Qinghua Zhang, a professor and Vice Dean of the College of Materials Science and Engineering at Donghua University, has joined the group as a visiting researcher. Welcome to the group Qinghua!

Raleigh Davis presents a poster at the Chemical and Biological Engineering department's annual Graduate Student Symposium.

September 2012

The Register group welcomes a whopping 4 senior thesis students to the group. Mike Showak and Andrew Stella will be studying how changing the chemical composition of poly(norbornene) affects its crystal structure and related properties. Ha-Kyung Kwon will followup on a very productive summer with the group by making new poly(styrene)-b-poly(ethylhexylmethacrylate) block copolymers. Siobhan Galligan will be using the flowcoater as a high throughput means of studying block copolymer-homopolymer blending in thin films. Welcome to the group seniors!

August 2012

Rick, Raleigh, and Adam make the short trip over to Philadelphia for the 244th American Chemical Society National Meeting & Exposition.  It was an exciting time as Rick was chosen to be a Class of 2012 ACS Fellow. Congrats Rick! Also, Raleigh presented in the field responsive polymers focus group.

It was a productive month for the group as Sheng and Adam publish their work on poly(phenylnorbornene) from ring-opening metathesis and its hydrogenated derivatives in Macromolecules. In addition, Andy Marencic (*10) publishes his work on orientational order in cylinder-forming block copolymer thin films in Physical Review E.

July 2012

Rick, Bryan, and Raleigh travel to Mount Holyoke College in South Hadley, Massachusetts to participate in the 2012 Gordon Research Conference in Polymer Physics.

June 2012

The group hosts the 19th nearly-annual Cohen-Register Polymer Microsymposium. Welcome back to Princeton Cohen group!

The group welcomes two students for the summer! Alyssa Whittington, an undergraduate from Bucknell University (where she is advised by group alumni Kat Wakabayashi) will work as part of the Research Experience for Undergraduates program hosted through the Princeton Center for Complex Materials. Alyssa's work will be on Ring-Opening Metathesis Polymerization and Living Polymer Coupling. The group also welcomes back Sahana Jayaraman, an incoming member of Princeton's freshmen class. Sahana worked with the group last summer as well as throughout the school year. This summer she will be expanding on her work studying the creation of controlled thickness gradients in polymer thin films via flowcoating.

Sheng publishes on melt and solid-state structures of polydisperse polyolefin multiblock copolymers in Macromolecules.

May 2012

Princeton undergraduate Ha-Kyung Kwon begins her summer work with the Register Group. Ha-Kyung will be studying the synthesis of poly(styrene)-b-poly(ethylhexylmethacrylate) block copolymers. Welcome Ha-Kyung!

April 2012

Group alumna Pratima Rangarajan *95 comes back to Princeton to present "Wind Energy ... the Journey" as part of the Andlinger Center's Highlight Seminar Series.  Welcome back Pratima!

March 2012

The whole group participates in Nanoday in Princeton at the Princeton Public Library. The event was hosted by the Princeton Center for Complex Materials education and outreach program. Approximately 500 people of a variety of ages and backgrounds attended the event.

Rick attends the 2012 American Chemical Society Spring meeting in San Deigo to present in a symposium honoring long time friend Robert E. Cohen who was awarded the 2012 Paul J. Flory Education Award.

Former postdoc, Saswati Pujari, publishes her work on shear alignment of standing lamellae in block copolymer thin films in Macromolecules. In further publication news, Rick publishes an insightful News & Views piece in Nature concerning polydispersity and its effects on self-assembly.

February 2012

Postdoc So Youn Kim joins the group after completing her Ph.D. at the University of Illinois at Urbana-Champaigne. Welcome to the group So Youn!

Rick travels to the University of Connecticut to give an invited seminar talk.

Rick, Bryan, and Raleigh travel to Boston for the 2012 annual American Physical Society's March Meeting. Rick gave an invited talk at the Dillon Medal Symposium on shear alignment of perpendicular lamellae in block copolymer thin films. Bryan gave a talk on the phase behavior of linear ABC triblock-random copolymers with a semicrystalline endblock as well as a poster on the phase behavior of hydrogenated derivatives of linear ABC block-random copolymers of styrene and isoprene. Raleigh gave his first conference presentation as a graduate student on the effect of thickness on microdomain orientation in shear-aligned, cylinder-forming PS-PHMA thin films.

January 2012

Second year student Raleigh Davis successfully defends his First Prop titled "Shear Alignment of Block Copolymer Thin Films to Produce Well-Ordered Microdomains for Use in Nanofabrication."

The group welcomes a new Ph.D. student, Adam Burns, from the University of Minnesota, Twin Cities. Welcome Adam!!  

Sheng Li moves to Seoul, South Korea where she will study the Korean language, finish writing papers and her thesis, and begin the next phase of her life. Best wishes to Sheng for continued success!

December 2011

Former postdoc Saswati Pujari starts her new position with Dow Chemical’s Wire and Cable Division (Spring House, PA).  Best for continued success!

November 2011

November 1:  Rick, Bryan, and Raleigh present a lecture-demo to over 200 middle school students at PCCM’s annual Materials Science Day on the Princeton Campus.  For more information (and photos), see our Outreach page.

Sheng’s paper (with Sasha Myers *08) on hPN-LPE diblocks captures the cover of the November 22 issue of Macromolecules!  For those with library access, the article on “Solid-State Structure and Crystallization in Double-Crystalline Diblock Copolymers of Linear Polyethylene and Hydrogenated Polynorbornene” can be found here.

The same November 22 issue of Macromolecules carried a second group paper, resulting from a collaboration with Professor Bryan Vogt (now in Polymer Engineering at U. Akron) and using polymers synthesized by John Bishop *11.  For those with library access, “Influence of Chain Stiffness of Thermal and Mechanical Properties of Polymer Thin Films” can be found here.

October 2011

American Institute of Chemical Engineers Annual Meeting, Minneapolis, MN: Saswati spoke on block copolymer thin films, Bryan presented on block-random copolymers and again on semicrystalline triblocks, and Rick presented in the Materials Engineering and Sciences Division Plenary Lecture.  A group+alumni lunch on Monday drew (in addition to Bryan, Saswati, and Rick) Chiajen Lai *99, Lynn Loo *01, John Sebastian *01 (who arranged the lunch), Justin Notestein ’01, Kat Wakabayashi *06, and Sasha Myers *08.  

August 2011

Rick travels to Shanghai to deliver a keynote lecture on "Block Copolymer Thermoplastic Elastomers with Composite Crystalline-Galssy Hard Domains", at the 2011 International Conference on Advanced Fibers and Polymer Materials (ICAFPM 2011), held on the campus of Donghua University. The trip also allowed Rick to reconnect with former postdoc Hongwei Zhang, based in nearby Suzhou, who is currently Technology Manager, Asia for GLS Thermoplastic Alloys.

June 2011

June 1-2: The group travels to MIT for the 18th nearly-annual Cohen-Register Polymer Microsymposium!  Program can be found here.

Jeremie Priest, from Cal State - Northridge, joins the group for summer 2011 as a participant in PCCM's Research Experience for Undergraduates Program, working on "Hot-Stage Ellipsometry of Polymer FIlms". Welcome Jeremie!

May 2011

Bryan’s article on “Synthesis and Phase Behavior of Block-Random Copolymers of Styrene and Hydrogenated Isoprene” appears in Macromolecules.  Those with library access can access the article. 

A new research project on "Synthesis and Properties of Model Thermoswitchable Surfaces" will launch shortly, with support from the Xerox Foundation, to exploit the phase behavior of block copolymers to control surface wettability.

John Bishop *11 receives his Ph.D. degree at Commencement on May 31, and will begin his position as a Research Investigator with DuPont Packaging and Industrial Polymers (at DuPont's Experimental Station, Wilmington, DE) on August 1.

May 31: Rick presents at the millstone River School's Chemistry Fair. For more information (and photos), see our Outreach page.

April 2011

John Bishop successfully defended his Ph.D. dissertation, "Structure-Property Relationships in Novel Polymers and Block Copolymers from Ring-Opening Metathesis Polymerization", on April 21. Congrats, John!

March 2011

Saswati, Bryan (talk and poster), and Sheng all presented at the American Physical Society March Meeting in Dallas, as part of the technical program of the Division of Polymer Physics (March 21-23). Sheng was named a finalist for the Frank J. Padden Award for Excellence in Polymer Physics. The full APS meeting program may be found here.

The entire group participated in the 2011 Science and Engineering Expo held at Princeton University on March 17th, at the Dillon gym site. Photos and information can be found here.

Professor Daniel Vega of the Universidad Nacional del Sur is spending March 2011 in Princeton as part of a collaboration funded by Argentina's CONICET, in partnership with the U.S. National Science Foundation. Welcome Daniel!

In support of the NOVA television program "Making Stuff", which aired in January and February on PBS, the Register Group performed a pair of 40-minute auditorium shows on the Princeton University campu, for middle school students whose teachers are partners in the science education outreach programs of the Princeton Center for Complex Materials. Click here for photos and more information. 

February 2011

Rick delivered the invited kickoff talk at Smart Coatings 2011 (Orlando, FL), on "Block Copolymer Thin Film Coatings: Film Structure, Shear Alignment, and Nanopatterning Applications". 

January 2011

The group welcomes a new Ph. D. student, Raleigh Davis, from North Carolina State University. Welcome Raleigh!!  

December 2010

Andy successfully defended his thesis "Well-Ordered Block Copolymer Thin Films Using Shear-Alignment Techniques ".  Congrats Andy!!  

November 2010

John Bishop’s article on “The crystal-crystal transition in hydrogenated ring-opened polynorbornenes” helps “relaunch” the journal of   Journal of Polymer Science B:   Polymer Physics by appearing in the inaugural issue.   For the article, click here; for information on the relaunch, click here.

Michael Keaton ’11 receives the J. Rich Steers Award from the New York City Post of the Society of American Military Engineers.   Michael was a Stoll Fellow in the lab during summer 2010, working on “Terpolymer Brushes for Substrate Neutralization.”

September 2010

John P. and Andy’s joint article on “Block Copolymer Thin Films with a Continuously Tunable Density of Spherical Microdomains” appears in Macromolecules.   For those with library access, click here.

John Bishop's article in Journal of Polymer Science Part B: Polymer Physics, entitled "The crystal-crystal transition in hydrogenated ring-opened polynorbornenes: Tacticity, crystal thickening, and alignment", has been featured on the material science news site Found here.

August 2010

“Polymers!” video from the 2010 Science and Engineering Exposition debuts as the headline story on the Princeton University homepage.   Click here to watch this three-minute video.  

Sheng’s collaboration with McGill University and Dow Chemical researchers on “Rheology and Structure of Molten, Olefin Multiblock Copolymers” appears in Macromolecules.   For those with library access, click here.

John B.’s article on the propagation kinetics of ring-opening metathesis polymerization and their effect on chain microstructure, “Cis/Trans Gradients in Living Ring-Opening Metathesis Polymerization”, appears in Polymer.   For those with library access, click here.

Sheng presents at the Fall American Chemical Society National Meeting and Exposition in Boston, MA. Technical Program can be found here.

Andy moves to Texas to begin his work at ExxonMobil.

The group bids farewell to Ramyata and Michael.

July 2010

Video on the summer Materials Science Camp for Teachers debuts on, the National Science Foundation’s public science outreach site.   Rick Register was an instructor at the Camp, and is interviewed in this three-minute video, which is viewable here.

The group welcomes a new postdoctoral associate Saswati Pujari, following her Ph.D. at Northwestern University.

June 2010

John B.’s article describing new “Thermoplastic Elastomers with Composite Crystalline-Glassy Hard Domains and Single-Phase Melts”, obtained by ring-opening metathesis polymerization, appears in Macromolecules.   For those with library access, click here.

U.S. Patent 7,745,528 issues, on “Functional Graphene – Rubber Nanocomposites” (with R. Prud’homme, B. Ozbas, I. Aksay, and D. Adamson).

The group welcomes undergrads Michael Keaton, Princeton, and Ramyata Upmaka, Carnegie Mellon, for summer research.

May 2010

Maria Phillip ’10 completes her senior thesis on “Statistical Terpolymers for Surface Modification”, and joins the Federal Bureau of Investigation as a Physical Scientist.   Congratulations, Maria!

Brian Michal ’10 shares the Air Products Award for his senior thesis on “Synthesis and Characterization of Polystyrene-Poly(n-hexylmethacrylate) Diblock Copolymers”, and will begin his Ph.D. in Macromolecular Science at Case Western Reserve University in September.   Congratulations, Brian!

Sheng’s article on “Crystallization in Ordered Polydisperse Polyolefin Diblock Copolymers” appears in Macromolecules.   This research was done collaboratively with Dow Chemical, where a coordinative chain transfer polymerization mechanism was developed to synthesize these novel “photonic polyethylenes”.   For those with library access, click here.

John Bishop begins a postdoctoral position at U. Delaware.

April 2010

Andy has a review article published in the inaugural edition of Annual Review of Chemical and Biomolecular Engineering, and John P. has a paper published in Journal of Applied Physics. Full references can be found here.

March 2010

Group alumna Lynn Loo *01 receives the John H. Dillon Medal of the Division of Polymer Physics at the March Meeting of the American Physical Society in Portland, OR, where a symposium was held in her honor. Congratulations, Lynn!

Rick presented John Bishop's work at the 239th American Chemical Society National Meeting and Exposition in San Francisco, CA. Technical program can be found here.

Rick, Bryan, and Sheng participated in the 2010 Science and Engineering Expo held at Princeton University on March 18th. Photos and information can be found here.

February 2010

The group bids a fond farewell to John Papalia. Best of luck John!

January 2010

Sasha has another paper published in Macromolecules, and Andy has another paper published in Physical Review E. Full references can be found here.