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Topic Area: Polymers

Displaying records 481 to 490 of 546 records.
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481. 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

482. 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

483. 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

484. 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

485. 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

486. 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

487. Certification of the Relative Molecular Mass and the Limiting Viscosity of SRM 2885, a Polyethylene of Narrow Molecular Mass Distribution
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6454
Topic: Polymers
Published: 1/1/2000
Authors: Charles Martin Guttman, J R. Maurey, William R. Blair
Abstract: The certification of a polyethylene standard reference material, SRM 2885, is described. The Mw of SRM 2885 by light scattering was determined to be 6.28 x 10^u+3^ g/mol with a sample standard deviation of 0.39 x 10^u+3^ g/mol. A combined expanded u ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851675

488. Certification of the Relative Molecular Mass and the Limiting Viscosity of SRM 2886, a Polyethylene of Narrow Molecular Mass Distribution
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6487
Topic: Polymers
Published: 1/1/2000
Authors: Charles Martin Guttman, J R. Maurey, William R. Blair
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853649

489. Certification of the Relative Molecular Mass and the Limiting Viscosity of SRM 2887, a Polyethylene of Narrow Molecular Mass Distribution.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6456
Topic: Polymers
Published: 1/1/2000
Authors: Charles Martin Guttman, J R. Maurey, William R. Blair, Carl R. Schultesiz
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853650

490. Determination of the Dielectric Constant of Nanoparticles. 1. Dielectric Measurements of Buckminsterfullerene Solutions
Topic: Polymers
Published: 1/1/2000
Authors: Chad R Snyder, Jack F Douglas
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853669



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