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Topic Area: Polymers

Displaying records 471 to 480 of 550 records.
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471. SANS Study of Sulfonate End Group Effect on Polystyrene Self-Diffusion
Topic: Polymers
Published: 10/1/2000
Authors: S D Kim, A Klein, L H Sperling, E M Boczar, Barry J. Bauer
Abstract: Film formation from a latex involves interdiffusion of the polymer chains. The interdiffusion behavior of polystyrene with H-ends, one sulfite-end, and two sulfite-ends are compared via small-angle neutron scattering (SANS) and a direct nonradiative ...

472. An Improved Synthesis of Ethyl Alpha-Hydroxymethylacrylate, a Unique Isomeric Analog of HEMA
Topic: Polymers
Published: 8/1/2000
Authors: Joseph M Antonucci, J W Stansbury, Bruce Owen Fowler
Abstract: HEMA is widely used in dental adhesives, bioactive composites and resin-modified glass ionomer cements. In its polymeric forms it is used in a number of biomedical applications, e.g. hydrogels for controlled-release, soft contact lenses, vascular gr ...

473. Atomic Force Microscopy Studies of Phase Ordering in Polymer Blends and Clay-Filled Systems
Topic: Polymers
Published: 8/1/2000
Authors: V Ferreiro, Jack F Douglas, Alamgir Karim, G Coulon
Abstract: Many industrial applications require a control of the morphology of thin polymer films. The morphology of thin polymer films depends on many factors : method of formation, tendency of film components to mix or dewet, the crystallization of film comp ...

474. Dendrimer Templates for the Formation of Gold Nanoclusters
Topic: Polymers
Published: 8/1/2000
Authors: Franziska Grohn, Barry J. Bauer, Y A Akpalu, C L. Jackson, Eric J. Amis
Abstract: Charged poly(amidoamine) (PAMAM) dendrimers are used to create organic-inorganic hybrid colloids in aqueous solution. The formation of gold colloids upon reduction of a gold salt precursor serves as a model reaction to study the influence of reaction ...

475. Numerical Simulation of Liquid Composite Injection/Compression Moding. Part 1: Mesh Generation
Topic: Polymers
Published: 6/14/2000
Authors: K M Pillai, C L Tucker, Frederick R Phelan Jr
Abstract: This paper presents a numerical simulation of the injection/compression type of liquid composite molding (LCI/CM), where the fiber preform is compressed to a desired degree at the same time as the resin is being injected into the mold. Due to the po ...

476. Critical Issues in the Characterization of Polymers for Medical Applications
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6535
Topic: Polymers
Published: 6/1/2000
Authors: Walter G McDonough, Eric J. Amis, J Kohn
Abstract: On June 14, 2000, the New Jersey Center for Biomaterials and the Polymers Division of the National Institute of Standards and Technology (NIST) co-sponsored a one-day workshop on Critical Issues in the Characterization of Polymers for Medical Applica ...

477. Surface Morphology Variations in MALDI-TOF-Mass Spectrometry Samples Prepared by Various Techniques Examined by Scanning Electron Microscopy
Topic: Polymers
Published: 6/1/2000
Authors: William R. Blair, Charles Martin Guttman, A A Guiseppetti
Abstract: Continuing interest at NIST (National Institute of Standards and Technology) in producing MALDI (Matrix Assisted Laser Desorption/Ionization) analyses with a mimimum of sample to sample signal variation has led to the comparison of hand spotting, spi ...

478. Effect of Water Exposure Cycles on Physical Properties of a Partical-Filled, Epoxy-Based Adhesive
Topic: Polymers
Published: 5/1/2000
Authors: Martin Y Chiang, M Fernandez-Garcia, E M Yorkgitis
Abstract: The effect of cyclic hygrothermal aging on a particle-filled, epoxy-based adhesive was studied using a sequence of water absorption, desorption and reabsorption at different temperatures. Moisture sorption characteristics were explored by measuring t ...

479. MALDI-TOF MS Analysis of a Library of Polymerizable Cyclodextrin Derivatives
Topic: Polymers
Published: 4/1/2000
Authors: Rafael L. Bowen, M Farahani, Sabine Hilla Dickens, Charles Martin Guttman
Abstract: Polymerizable cyclodextrin derivatives (PCDs) have been proposed as candidates for use in dental therapeutics (Bowen, 1996 and Bowen and Reed, 1997). Here PCD libraries were synthosized by quasi-random reactions of 6 moles of methacrylic anhydride pl ...

480. Physical Aging of Amorphous PEN: Isothermal, Isochronal and Isostructural Results
Topic: Polymers
Published: 4/1/2000
Authors: M L Cerrada, G B. McKenna
Abstract: The viscoelastic and physical aging responses have been analyzed for an amorphous poly(ethylene naphthalate) (PEN) using uniaxial tension stress relaxation experiments. It is known that PEN exhibits a strong {beta} relaxation that overlaps the {alp ...

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