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Topic Area: Polymers

Displaying records 531 to 540 of 547 records.
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531. Small-Angle Neutron Scattering of Solutions of Arborescent Graft Polystyrenes
Topic: Polymers
Published: 1/1/1999
Authors: S M Choi, R M Briber, Barry J. Bauer, A Topp, M Gauthier, L Tichagwa

532. Spin-on-Glass Thin Films Prepared From a Novel Polysilsesquioxane by Thermal and Ultraviolet-Irradiation Methods
Topic: Polymers
Published: 1/1/1999
Authors: Q Pan, G B Gonzalez, R J Composto, William E Wallace III, B Arkles, L K Figge, D H Berry
Abstract: The pyrolytic and photolytic conversion of a new polymer precursor, namely -chloroethyl-silsesquioxane (BCESSQ), to an ormosil film is presented. At 350 C the film thickness rapidly decays to 55% of its original thickness within 60 min. A range of ...

533. Statistical Analysis of NIST Interlaboratory Comparison of Polystyrene Molecular Mass Distribution Obtained by MALDI TOF MS
Topic: Polymers
Published: 1/1/1999
Authors: S Wetzel, Charles Martin Guttman, Kathleen M. Flynn

534. Stress Relaxation of Poly(Ethylene Naphthalate): Isothermal, Isochronal, and Isostructural Responses
Topic: Polymers
Published: 1/1/1999
Authors: M L Cerrada, G B. McKenna

535. Study of Aggregates of Fullerene-Based Ionomers in Aqueous Solutions Using Small Angle Neutron and X-ray Scattering
Topic: Polymers
Published: 1/1/1999
Authors: U Jeng, T L Lin, C S Tsao, C H Lee, T Canteenwala, L Y Wang, L Y Chiang, Charles C. Dr. Han

536. The Effects of Steady Shear on the Order and Orientation of a Diblock Copolymer Melt using In-Situ Small-Angle Neutron Scattering
Topic: Polymers
Published: 1/1/1999
Authors: K A Barnes, F A Morrison, A Nakatani, J W Mays

537. Evolution of Microstructure in the Liquid and Crystal Directions in a Quenched Block Copolymer Melt and Its Implication on Phase Transition Mechanisms
Topic: Polymers
Published: 11/1/1998
Authors: N P Balsara, B A Garetz, M C Newstein, Barry J. Bauer, T J. Prosa
Abstract: Evolution of the disorder-to-order transition within a block copolymer is studied by the thermal quenching of samples from the melt to an ordered state. The ordered state consists of cylinders arranged on a hexagonal lattice and has liquid crystallin ...

538. Molecular Structure of Silsesquioxanes Determined by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry
Topic: Polymers
Published: 11/1/1998
Authors: William E Wallace III, Charles Martin Guttman, Joseph M Antonucci
Abstract: Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry was used to deduce the three-dimensional structure of a complex silsesquioxane polymer. Four distinct levels of structure were observed in the mass spectrum. The overall ...

539. Limitations on Distinguishing Between Representations of Relaxation Data Over Narrow Frequency Ranges
Topic: Polymers
Published: 10/1/1998
Authors: Chad R Snyder, F I. Mopsik
Abstract: In this article, we examine the ability to distinguish between relaxation functions with data over limited range of frequency. It is demonstrated that over these limited frequency ranges under a variety of conditions, the Cole-Cole equation can be us ...

540. Interface Adhesion of E-Glass Fibers in Model Polyisocyanurate Networks
Topic: Polymers
Published: 9/23/1998
Authors: Walter G McDonough, Gale Antrus Holmes, R C Peterson
Abstract: Recent work examining the nature of the failure process of glass/epoxy specimens in the single fiber fragmentation test showed that the matrix exhibited pronounced non-linear viscoelastic behavior during the test, and that the interfacial shear stren ...

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