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Topic Area: Polymers

Displaying records 511 to 520 of 549 records.
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511. Water Transport in Crosslinked 2-Hydroxyethyl Methacrylate
Topic: Polymers
Published: 1/1/2000
Authors: K F Chou, Charles C. Dr. Han, S K Lee

512. Study of Ethylene-Propylene Copolymer Thermoreversible Gels
Topic: Polymers
Published: 12/1/1999
Authors: C Daniel, T C Jao, Barry J. Bauer, Eric J. Amis
Abstract: Molecular structure and rheological properties of ethylene-propylene (EP) random copolymer gels formed in toluene and methylcyclohexane, respectively, have been investigated by small angle neutron scattering (SANS) and oscillatory shear. In both sol ...

513. 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 ...

514. 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 ...

515. 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 ...

516. 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- ...

517. 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 ...

518. 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 ...

519. 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

520. Fluorescence Anisotropy Measurements of Oriented Polymers
Topic: Polymers
Published: 1/1/1999
Authors: Anthony J. Bur, S C Roth

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