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Topic Area: Polymers

Displaying records 481 to 490 of 550 records.
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481. Polymer Division Technical Activities - 1999
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6435
Topic: Polymers
Published: 4/1/2000
Authors: Eric J. Amis, B M Fanconi
Abstract: Technical activities of the Polymers Division, 854, for the 1999 fiscal year are described. The report is organized by programs: Electronic Packaging, Interconnection and Assembly; Polymer Blends and Processing; Polymer Composites; Polymer Characte ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851677

482. A Direct Comparison of SANS and DET for Polymer Diffusion During Polystyrene Latex Film Formation
Topic: Polymers
Published: 3/1/2000
Authors: S D Kim, E M Boczar, Barry J. Bauer, A Klein, L H Sperling
Abstract: Polystyrene latex film is a model system for the study of interdiffusion in polymers. Small-angle neutron scattering (SANS) and a direct nonradiative energy transfer technique (DET) are widely used to study the interdiffusion of polymers in latex fil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851660

483. Determination of the Molecular Mass Distribution of Narrow Polydispersity Polystyrene by MALDI-TOF-MS: Interlaboratory Comparison
Topic: Polymers
Published: 3/1/2000
Authors: Kathleen M. Flynn, S Wetzel, William E Wallace III, William R. Blair, R J Goldschmidt, David Lloyd VanderHart, B M Fanconi
Abstract: NIST has sponsored a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) interlaboratory comparison using a well-characterized polystyrene to determine the reproducibility in determining the molecular mass dis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851652

484. Fluorescence Anisotropy Sensor and Its Application to Polymer Processing and Characterization
Topic: Polymers
Published: 3/1/2000
Authors: Anthony J. Bur, S C Roth, C L Thomas
Abstract: An optical sensor containing polarizing optical components has been constructed for the purpose of monitoring fluorescence anisotropy during polymer processing and for carrying out remote sensing of polymer products doped with fluorescent dyes. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851613

485. MALDI-TOF Mass Spectrometry of Polymeric Silsesquioxanes
Topic: Polymers
Published: 3/1/2000
Authors: William E Wallace III, Charles Martin Guttman, Joseph M Antonucci
Abstract: Matrix-assisted laser desorption ionization time-of-flight mass spectrometry has been shown to be an effective method to determine the degree-of-intramolecular-condensation of polymeric silsesquioxanes. The nature of the organic R' leaving group wa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852815

486. Polymeric Silsesquioxanes: Degree-of-Intramolecular-Condensation Measured by Mass Spectrometry
Topic: Polymers
Published: 3/1/2000
Authors: William E Wallace III, Charles Martin Guttman, Joseph M Antonucci
Abstract: The degree-of-condensation, defined as the number of residual silanol (SiOH) groups per oligomer, for a variety of silsesquioxane polymers was measured by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Condensation of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851556

487. Preparation and Characterization of Polymer/Dendrimer Blends: Final Report, March 2000
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6506
Topic: Polymers
Published: 3/1/2000
Authors: Eric J. Amis, Barry J. Bauer, A Topp, F Groehn, T J. Prosa, B D Viers, Da-Wei Liu, K A Barnes, C L. Jackson, G Nisato, Alamgir Karim, Jack F Douglas
Abstract: This report is a summary of the results of measurement and characterization on dendritically branched polymers that was done under Army Research Office Grant contract 35109-CH. This summary encompasses 3 previous NISTIR's for consecutive 12 month per ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851721

488. Templating Nanocrystals with Dendrimers: A Mesoscopic Model System
Topic: Polymers
Published: 3/1/2000
Authors: Franziska Grohn, Barry J. Bauer, Eric J. Amis
Abstract: Poly(amidoamine) (PAMAM) dendrimers of generation 2 to 10 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 model reaction to study influences on ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851653

489. An Optical Sensor for Polymer Injection Molding
Topic: Polymers
Published: 1/1/2000
Authors: Anthony J. Bur, C L Thomas
Abstract: An optical sensor using fiber optics to access the mold cavity was used to monitor the mold filling and cooling phases of injection molding. The sensor consists of a sapphire window at the end of a sleeved ejector pin into which an optical fiber is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851715

490. Blends of Fatty-Acid-Modified Dendrimers With Polyolefins
Topic: Polymers
Published: 1/1/2000
Authors: Barry J. Bauer, A Ramzi, D W. Liu, R L Scherrenberg, P Froehling, J Joosten
Abstract: Blends were made by solution and melt mixing fatty acid modified dendrimers with various polyolefins. Small angle neutron scattering (SANS) was used to determine the miscibility of the blends. Poly propylene imine (PPI) dendrimers G1, G3, and G5 (DAB ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851521



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