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You searched on: Topic Area: Polymers

Displaying records 41 to 50 of 413 records.
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41. 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

42. Formation of Extended Ionomeric Network by Bulk Polymerization of L,D-lactide with Layered Double Hydroxide
Topic: Polymers
Published: 11/22/2012
Authors: Edward D. 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

43. 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

44. 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

45. Effect of offset values of solid freeform fabricated PCL/ß-TCP scaffolds on mechanical properties and cellular activities in bone tissue regeneration
Topic: Polymers
Published: 11/1/2012
Authors: Carl George Simon Jr., GeunHyung Kim, MyungGu Yo
Abstract: Microstructures of biomedical scaffolds can greatly affect cellular activities in tissue regeneration. In particular, scaffolds used in bone tissue regeneration should have several microstructural characteristics, including high porosity, appropriate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910879

46. 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

47. 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

48. 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

49. Synthesis and characterization of model crosslinked polyamide films for water purification
Topic: Polymers
Published: 6/24/2012
Authors: Peter M. Johnson, Edwin P Chan, Jun Y. Chung, Junghyun Lee, Christopher M Stafford
Abstract: Reverse osmosis (RO) and nanofiltration (NF) membranes are comprised of a dense active layer supported by a porous support. Commercial active layer are highly crosslinked polyamides that are formed through interfacial polymerization directly on the s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911116

50. Pronounced micro-segregation in a sorbitol water mixture observed through variable temperature neutron scattering
Topic: Polymers
Published: 5/16/2012
Authors: Shin G. Chou, Sheila Khodadadi, Joseph E Curtis, Susan T Krueger, Evgenyi Shalaev, Alan Soper, Andy Fitch, T Narayanan, Michael Szutucki, Marcus T Cicerone
Abstract: In this study, we use small and wide angle X-ray and neutron scattering measurements, to study the structure of concentrated sorbitol solutions and glasses at different temperatures. The analysis of the data suggests the water forms clusters with a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909101



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