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Topic Area: Polymers
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Displaying records 501 to 510 of 537 records.
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501. Living Poly({Alpha}-Methylsyrene) Near the Polymerization Line: VII. Molecular Weight Distribution in a Good Solvent
Topic: Polymers
Published: 11/1/1999
Authors: S S Das, J Zhuang, A P Andrews, S C Greer, Kathleen M. Flynn, William R. Blair
Abstract: We have studied the time development of the molecular mass distribution (MWD) of living bifunctional poly({alpha}-methylstyrene) in tetrahydrofuran after a quench to 21 K below the polymerization temperature T^dp^. We see an intermediate Gaussian ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851588

502. Small Angle Neutron Scattering of Solutions of Arborescent Graft Polymers
Topic: Polymers
Published: 11/1/1999
Authors: S M Choi, R M Briber, Barry J. Bauer, A Topp, M Gauthier, L Tichagwa
Abstract: Small angle neutron scattering was used to measure the size and shape of arborescent graft polymers as a function of generation number in solution. The radius of gyration of arborescent graft polymers was found to be almost independent of temperatur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851602

503. Time-Domain Dielectric Spectroscopy Analysis of the Amorphous Phase in Semicrystalline Polycarbonate
Topic: Polymers
Published: 8/1/1999
Authors: Chad R Snyder, F I. Mopsik, H Marand, S M Sohn
Abstract: The amorphous state of bisphenol-A polycarbonate was examined by time-domain dielectric spectroscopy as a function of crystallization time over a frequency range of 1 x 10^u-4^ Hz to 1 x 10^u4^ Hz. The dielectric measurements were performed in the te ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851636

504. Molecularly Dispersed Dendrimers in a Polymeric Matrix
Topic: Polymers
Published: 3/1/1999
Authors: Barry J. Bauer, T J. Prosa, D W. Liu, C L. Jackson, D A Tomalia, Eric J. Amis
Abstract: Interpenetrating polymer networks are formed by dissolving poly(amidoamine) dendrimers in 2-hydroxyethyl methacrylate and polymerizing with dendrimer contents between 1 and 25 mass % containing dendrimers from generation 6 through 11. Small angle x- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851517

505. Comparison of Classical and MALDI-TOF-MS Analysis of a Polystyrene Interlaboratory Sample
Topic: Polymers
Published: 1/1/1999
Authors: William R. Blair, B M Fanconi, R J Goldschmidt, Charles Martin Guttman, William E Wallace III, S Wetzel, David Lloyd VanderHart
Abstract: Over the past several years, the use of MALDI-TOF-MS for analysis of synthetic polymers has increased significantly. As the number of polymer analyses by MALDI has increased, scrutiny of the MALDI results in comparison to classically derived values ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851607

506. Domain Structure and Interphase Dimensions in Poly(Urethaneurea) Elastomers Using DSC and SAXS
Topic: Polymers
Published: 1/1/1999
Authors: S G Musselman, T M Santosusso, J D. Barnes, L H Sperling
Abstract: Small-angle x-ray scattering (SAXS) and differential scattering calorimetry (DSC) were used to demonstrate distinct differences in domain size, phase separation, and hydrogen bonding in a series of segmented urethaneurea elastomers prepared from isoc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851483

507. Domain Structure and Interphase Dimensions in Poly(Urethaneurea) Elastomers Using DSCand SAXS
Topic: Polymers
Published: 1/1/1999
Authors: S G Musselman, T M Santosusso, J D. Barnes, L H Sperling
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853713

508. Fluorescence Anisotropy Measurements of Oriented Polymers
Topic: Polymers
Published: 1/1/1999
Authors: Anthony J. Bur, S C Roth
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853687

509. Generation of Different UHMWPE Particle Shape by Wear Through Surface Texturing
Topic: Polymers
Published: 1/1/1999
Authors: H. W. Fang, M C Shen, U Cho, John A Tesk, A Christou, Stephen M. Hsu
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853694

510. In-Line Dielectric Sensor for Chemical Composition Measurements in Molten Polymers
Topic: Polymers
Published: 1/1/1999
Authors: M M McBrearty, Anthony J. Bur, S Perusich
Abstract: We describe a dielectric sensor that incorporates a flow-through design so that it can be placed in-line on an extruder. Dielectric measurements have been successfully applied for measuring additive concentrations in polymer melts during extrusion p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851531



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