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Topic Area: Polymers
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1. Spontaneous wrinkling in azlactone-based functional polymer thin films in 2d and 3d geometries for guided nanopatterning
Topic: Polymers
Published: 2/4/2013
Authors: Muruganathan Ramanathan, Bradley S Lokitz, Jamie M Messman, Christopher M Stafford, S. Michael Kilbey
Abstract: We report a simple, one step process for developing wrinkling patterns in azlactone-based polymer thin films and brushes in 2D and 3D surfaces. The polymer used in this work wrinkles spontaneously upon deposition and solidification on a substrate wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913291

2. Correlating Chlorine-Induced Changes in Mechanical Properties to Performance in Polyamide-Based Thin Film Composite Membranes
Topic: Polymers
Published: 1/26/2013
Authors: Junghyun Lee, Jun Y. Chung, Edwin P Chan, Christopher M Stafford
Abstract: Understanding the degradation of polyamide-based (PA) thin-film composite membranes by chlorine is imperative to develop chlorine-resistant membranes, an important characteristic that is needed to provide the desired long-term performance of membrane ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912011

3. Swelling of ultrathin crosslinked polyamide water desalination membranes
Topic: Polymers
Published: 12/27/2012
Authors: Edwin P Chan, Allison P Young, Jung-Hyun Lee, Jun-Young Chung, Christopher M Stafford
Abstract: We study the water swelling behavior of semi-aromatic crosslinked polyamide ultrathin films in order to characterize the materials properties of the polymer network. Specifically, we utilize X-ray reflectivity and quartz crystal microbalance to m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912297

4. An automated spin-assisted approach for molecular layer-by-layer assembly of crosslinked polymer thin films
Topic: Polymers
Published: 11/28/2012
Authors: Edwin P Chan, Jung-Hyun Lee, Jun-Young Chung, Christopher M Stafford
Abstract: We present the design of an automated spin-coater that facilitates fabrication of polymer films based on molecular layer-by-layer (mLbL) assembly. Specifically, we demonstrate the synthesis of ultrathin crosslinked fully-aromatic polyamide films ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912301

5. Formation of Extended Ionomeric Network by Bulk Polymerization of L,D-lactide with Layered Double Hydroxide
Topic: Polymers
Published: 11/22/2012
Authors: Edward David McCarthy, Mauro Zammarano, Douglas M. Fox, Ryan C Nieuwendaal, Yeon Seok Kim, P H Maupin, Paul C Trulove, Jeffrey W Gilman
Abstract: We report the formation of an ionomeric network in a poly(L,D-lactide) hybrid nanocomposite, (PLDLA-HYB) during in-situ melt polymerization of L,D lactide in the presence of magnesium/aluminium layered-double-hydroxide (LDH) without added catalyst. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910615

6. Capillary Wave Dynamics of Thin Polymer films over Submerged Nanostructures
Topic: Polymers
Published: 11/16/2012
Authors: Christopher L Soles, Hyun Wook Ro, K. J. Alvine, Oleg Shpyrko, Yenling Dai, Alec Sandy, Suresh Narayanan
Abstract: The surface dynamics of thin molten polystyrene films supported by nanoscale periodic silicon line-space gratings were investigated with X-ray photon correlation spectroscopy. Surface dynamics over these nanostructures exhibit high directional aniso ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910869

7. Imaging the Molecular Structure of Polyethylene Blends with Broadband Coherent Raman Microscopy
Topic: Polymers
Published: 11/8/2012
Authors: Young Jong Lee, Chad R Snyder, Aaron M Forster, Marcus T Cicerone, Wen-Li Wu
Abstract: Polyethylene (PE) is a ubiquitous material in our daily life appearing as milk bottles, toys and diapers. A lesser-known but increasingly important use of PE is as underground gas and water pipes, because of its ease of installation and lack of corr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911831

8. Anisotropic, Hierarchical Surface Patterns via Surface Wrinkling of Nanoimprinted Polymer Films
Topic: Polymers
Published: 10/22/2012
Authors: Junghyun Lee, Hyun Wook Ro, Rui Huang, Thomas Avery Germer, Paul Lemaillet, Christopher L Soles, Christopher M Stafford
Abstract: we demonstrated the wrinkling behavior of nanopatterned PS films, whose wrinkle wavelength and resultant morphology depend strongly on geometric parameters of surface patterns as well as the direction of the applied strain relative to the nanopattern ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912044

9. Controlling Thermochromism in a Photonic Block Copolymer Gel
Topic: Polymers
Published: 9/26/2012
Authors: Joseph J Walish, Yin Fan , Andrea Centrone, Edwin L. Thomas
Abstract: Controlling the color via temperature-induced changes of self-assembled photonic materials is important for their application in sensors and displays. The thermochromic behavior of a PS-P2VP photonic gel was studied (UV-VIS, FTIR) and found to origin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910499

10. INVESTIGATING THE MECHANISM OF ENZYME-CATALYZED RING-OPENING COPOLYMERIZATIONS
Topic: Polymers
Published: 8/19/2012
Authors: Matthew T. (Matthew) Hunley, Fahriye Nese Sari, Kathryn L Beers
Abstract: As the research interest in degradable polymers has risen, an ever increasing number of manuscripts report the synthesis of copolymers through ring-opening copolymerization techniques. However, the mechanism of copolymerization remains unexplored. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911008