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Displaying 1 - 25 of 1477

Competitive solvation effects in polyelectrolyte solutions

August 01, 2018

Author(s):

Alexandros Chremos, Jack F. Douglas

An understanding of the solution properties and phase behavior of natural and synthetic polyelectrolytes requires an understanding of the competitive...

A Comparative Study of Thermodynamic, Conformational, and Packing Properties of Bottlebrush with Star and Ring Polymer Melts

July 27, 2018

Author(s):

Alexandros Chremos, Jack F. Douglas

Thermodynamic, conformational, and structure properties of bottlebrush polymer melts are investigated with molecular dynamics simulations and compared to...

Characterization of Interfacial Structure in Polymer-Fullerene Bulk Heterojunctions via 13C {2H} Rotational Echo Double Resonance NMR

July 13, 2018

Author(s):

Ryan C. Nieuwendaal, Dean M. DeLongchamp, Martin Heeney, Jan Hummelen, Chad R. Snyder, Ronald L. Jones, Sebastian Engmann, Lee J. Richter, Zhuping Fei, Alex Sieval

We introduce a new application of solid state NMR measurements towards characterizing the donor-acceptor interfaces within bulk heterojunction (BHJ) films...

Polyelectrolyte association and solvation

July 10, 2018

Author(s):

Alexandros Chremos, Jack F. Douglas

There has been significant interest in the tendency of highly charged particles having the same charge to form dynamic clusters in solution, but an accepted...

Stoichiometric analysis of hydrogen bonding interactions in a mixture of cross-linking resin monomers

June 27, 2018

Author(s):

Seungwan Ryu, Xiaohui Liu, Ying Jin, Jirun Sun, Young J. Lee

We investigate multiple hydrogen bonding interactions in a binary mixture of cross-linking resin monomers: urethane dimethacrylate (UDMA) and triethylene...

Oxidation Reactions in Kink Bands Regions of UHMMPE Fiber-Based Laminates Used in Body Armor: A Mechanistic Study

May 29, 2018

Author(s):

Zois Tsinas, Amanda L. Forster, Mohamad I. Al-Sheikhly

This work demonstrates the synergy between the thermo-mechanical induced degradation and the oxidation reactions in the kink-banded areas of ultra-high molar...

Equilibrium Free Energies from Non-Equilibrium Trajectories with Relaxation Fluctuation Spectroscopy

May 28, 2018

Author(s):

David J. Ross, Elizabeth A. Strychalski, Christopher Jarzynski, Samuel M. Stavis

Recent advances in non-equilibrium statistical mechanics and single-molecule measurements have enabled the determination of equilibrium free energies from non-...

Energy Renormalization Method for the Coarse-Graining of Polymer Viscoelasticity

May 10, 2018

Author(s):

Jake Song, David D. Hsu, Kenneth R. Shull, Frederick R. Phelan Jr., Jack F. Douglas, Wenjie Xia, Sinan Keten

Developing time and temperature transferable coarse-grained (CG) models is essential for the computational prediction and design of polymeric glass-forming...

Short-time dental resin biostability and kinetics of enzymatic degradation

May 09, 2018

Author(s):

Xiaohong Wang, Sheng Song, Lei Chen, Christopher M. Stafford, Jirun Sun

Resin biostability is an important concern regarding the durability of methacrylate-based dental resin restorations. Current resin biostability evaluation...

The Evolution of Polystyrene as a Cell Culture Material: A Brief History

April 10, 2018

Author(s):

Max J. Lerman, Josephine Lembong, Shinichiro Muramoto, John G. Gillen, John P. Fisher

Polystyrene (PS) has brought in vitro cell culture from its humble beginnings to the modern era, propelling dozens of research fields along the way. This...

Functional Group Quantification of Polymer Nanomembranes with Soft X-rays

March 15, 2018

Author(s):

Daniel F. Sunday, Edwin P. Chan, Sara V. Orski, Ryan C. Nieuwendaal, Christopher M. Stafford

Paper in electronic and optoelectronic devices

March 06, 2018

Author(s):

Dongheon Ha, Zhiqiang Fang, Nikolai B. Zhitenev

The demand for lightweight, cost-effective, and/or flexible electronic and optoelectronic devices drives research toward new materials advancing the desired...

Influence of Polymer and Ion Solvation on Conformational Properties of Flexible Polyelectrolytes

March 02, 2018

Author(s):

Alexandros Chremos, Jack F. Douglas

The study of the coupling between the conformational properties of a polyelectrolyte chain and the distribution of counter-ions surrounding the chain is...

“Unexpected” frequency behavior in QCM-D: When can frequency increase with increased adhered mass?

February 23, 2018

Author(s):

Christopher C. White, Wiener Clinton, Robert A. Weiss, Vogt D. Bryan

For the qualitative interpretation of quartz crystal microbalance (QCM) data, a decrease in frequency is generally indicative of increased coupled mass to the...

A Kinetics Based Models for Environmentally Induced Sealant Degradation

February 13, 2018

Author(s):

Donald L. Hunston, Christopher C. White

Caulks and sealants are a critical part of any structure that is exposed to the environment. Although they are good materials, they eventually fail, and the...

Optimizing Self-Consistent Field Theory Block Copolymer Models with X-Ray Metrology

February 12, 2018

Author(s):

Adam F. Hannon, Daniel F. Sunday, Alec Bowen, Gurdaman Khaira, Jiaxing Ren, Paul Nealey, Juan de Pablo, Regis J. Kline

A block copolymer self-consistent field theory (SCFT) model is used for direct analysis of experimental X-ray scattering data obtained from thin films of...

Inverse Transformation: Unleashing Heterogeneous Dynamics with an Alternative Approach to XPCS Data Analysis

January 31, 2018

Author(s):

Ross N. Andrews, Suresh Narayanan, Fan Zhang, Ivan Kuzmenko, Jan Ilavsky

X-ray photon correlation spectroscopy (XPCS), as an extension of dynamic light scattering (DLS) in the X-ray regime, detects temporal intensity fluctuations of...

Ferroelectricity in Polar Polymer-based FETs: A Hysteresis Analysis

January 15, 2018

Author(s):

Vasileia Georgiou, Dmitry Veksler, Jason P. Campbell, Jason T. Ryan, Pragya R. Shrestha, D. E. Ioannou, Kin P. Cheung

There is an increasing number of reports on polar polymer-based Ferroelectric Field Effect Transistors (FeFETs), where the hysteresis of the drain current...

Nanostructured lipid-based films for substrate-mediated applications in biotechnology

January 10, 2018

Author(s):

Minjee Kang, Mohit Tuteja, Andrea Centrone, Daniel Topgaard, Cecilia Leal

Amphiphilic in nature, lipids spontaneously self-assemble into a range of nanostructures in the presence of water. Among lipid self-assembled structures,...

Characterizing the Interface Scaling of High Chi Block Copolymers near the Order-Disorder Transition

January 09, 2018

Author(s):

Daniel F. Sunday, Michael Maher, Adam F. Hannon, Christopher D. Liman, Summer Tein, Gregory Blachut, Yusuke Asano, Christopher Ellison, C. Grant Willson, Regis J. Kline

Quantitative Comparison of Atomistic Simulations with Experiment for a Cross-Linked Epoxy: A Specific Volume – Cooling-Rate Analysis Epoxy

January 08, 2018

Author(s):

Ketan S. Khare, Frederick R. Phelan Jr.

Cross-linked epoxy thermosets, like all glass-forming viscoelastic materials, show both a temperature and rate dependence in their thermo-mechanical properties...

Validation of ATR FT-IR to identify polymers of plastic marine debris, including those ingested by marine organisms

January 03, 2018

Author(s):

Melissa R. Jung, F. D. Horgen, Sara V. Orski, Viviana Rodriguez Cardenas, Kathryn L. Beers, George H. Balazs, T. T. Jones, Thierry M. Work, Kayla C. Brignac, Sarah-Jeanne Royer, K. D. Hyrenbach, Brenda A. Jensen, Jennifer M. Lynch

Polymer identification of plastic marine debris can help identify its sources, degradation, and fate. We optimized and validated a fast, simple, and accessible...

Communication: Counter-ion solvation and anomalous low-angle scattering in salt-free polyelectrolyte solutions

December 29, 2017

Author(s):

Alexandros Chremos, Jack F. Douglas

We investigate the influence of counter-ion solvation on the homogeneity of salt-free polyelectrolyte solutions based on coarse-grained model that includes an...

Evaluating models for polycaprolactone crystallization via simultaneous rheology and Raman spectroscopy

December 27, 2017

Author(s):

Anthony P. Kotula, Kalman D. Migler

The crystallization of a polymer melt is characterized by dramatic structural and mechanical changes that have a significant impact on the processing...

Highly Efficient Rapid Annealing of Thin Polar Polymer Film Ferroelectric Devices at Sub-Glass Transition Temperature

December 18, 2017

Author(s):

Vasileia Georgiou, Dmitry Veksler, Jason T. Ryan, Jason P. Campbell, Pragya R. Shrestha, D. E. Ioannou, Kin P. Cheung

An unexpected rapid anneal of electrically active defects in an ultra-thin (15.5 nm) polar polyimide film at and below glass transition temperature (Tg) is...

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