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Displaying 1901 - 1925 of 1944

Domain Structure and Interphase Dimensions in Poly(Urethaneurea) Elastomers Using DSC and SAXS

January 1, 1999

Author(s)

S G. Musselman, T M. Santosusso, J D. Barnes, L H. Sperling

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 isocyanate

Domain Structure and Interphase Dimensions in Poly(Urethaneurea) Elastomers Using DSCand SAXS

January 1, 1999

Author(s)

S G. Musselman, T M. Santosusso, J D. Barnes, L H. Sperling

Fluorescence Anisotropy Measurements of Oriented Polymers

January 1, 1999

Author(s)

Anthony J. Bur, S C. Roth

Generation of Different UHMWPE Particle Shape by Wear Through Surface Texturing

January 1, 1999

Author(s)

H. W. Fang, M C. Shen, U Cho, John A. Tesk, A Christou, Stephen M. Hsu

In-Line Dielectric Sensor for Chemical Composition Measurements in Molten Polymers

January 1, 1999

Author(s)

M M. McBrearty, Anthony J. Bur, S Perusich

We describe a dielectric sensor that incorporates a flow-through design so that it can be placed in-line on an extruder. Dielectric measurements have been successfully applied for measuring additive concentrations in polymer melts during extrusion

In-Situ Monitoring of Product Shrinkage During Injection Molding Using an Optical Sensor

January 1, 1999

Author(s)

C L. Thomas, Anthony J. Bur

We have used an optical fiber sensor for in-situ monitoring of product shrinkage during injection molding. The sensor, consisting of a bundle of optical fibers with a sapphire window at its end, is positioned in the ejector pin channel of the mold so that

Living Poly(Alpha-Methylstyrene) Near the Polymerization Line. Vii. Molecular Weight Distribution in a Good Solvent

January 1, 1999

Author(s)

S S. Das, J Zhuang, A P. Andrews, S C. Greer, Charles M. Guttman, William R. Blair

Measurement of Thermal Conductivity Using Tmdsc: Solution to the Heat Flow Problem

January 1, 1999

Author(s)

S L. Simon, G B. McKenna

Mechanical and Swelling Behaviors of Rubber: a Comparison of Some Molecular Models With Experiment

January 1, 1999

Author(s)

W H. Han, F Horkay, G B. McKenna

Network Structure of Bimodal Epoxies - a Small Angle X-Ray Scattering Study

January 1, 1999

Author(s)

N C. BeckTan, Barry J. Bauer, J Plestil, J D. Barnes, Da-Wei Liu, L Matejka, K Dusek, Wen-Li Wu

On-Line Monitoring of Polymer Orientation during Injection Molding

January 1, 1999

Author(s)

Eric Edwards, C L. Thomas, Anthony J. Bur

Optical Monitoring of Polypropylene Injection Molding

January 1, 1999

Author(s)

C L. Thomas, Anthony J. Bur

We have constructed an optical fiber sensor for monitoring injection molding and we have developed a model to describe sensor behavior. The sensor consists of a sapphire window at the end of a sleeved ejector pin into which an optical fiber is inserted

Orientation Texture from Polymeric Materials Using Scattering Methods

January 1, 1999

Author(s)

J D. Barnes

Polymeric Materials Interest Group Workshop: Quantitative Determination of Synthetic Polymer Molecular Mass Distribution

January 1, 1999

Author(s)

William E. Wallace

Preliminary report on the NIST molecular mass distribution interlaboratory comparison.

Polymeric Silsesquioxanes: Measuring the Degree of Intramolecular Condensation

January 1, 1999

Author(s)

William E. Wallace, Charles M. Guttman, Joseph M. Antonucci

Polymers 1998 Programs and Accomplishments

January 1, 1999

Author(s)

B M. Fanconi, Donald L. Hunston

Technical activities of the Polymers Division, 854, for the 1998 fiscal year are described. Thereport is organized by programs: Electronic Packaging, Interconnection and Assembly; Polymer Blends and Processing; Polymer Composites; Polymer Characterization

POLYMERS 1999 Programs and Accomplishments

January 1, 1999

Author(s)

B M. Fanconi, Eric J. Amis

Small-Angle Neutron Scattering of Solutions of Arborescent Graft Polystyrenes

January 1, 1999

Author(s)

S M. Choi, R M. Briber, Barry J. Bauer, A Topp, M Gauthier, L Tichagwa

Spin-on-Glass Thin Films Prepared From a Novel Polysilsesquioxane by Thermal and Ultraviolet-Irradiation Methods

January 1, 1999

Author(s)

Q Pan, G B. Gonzalez, R J. Composto, William E. Wallace, B Arkles, L K. Figge, D H. Berry

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 ion

Statistical Analysis of NIST Interlaboratory Comparison of Polystyrene Molecular Mass Distribution Obtained by MALDI TOF MS

January 1, 1999

Author(s)

S Wetzel, Charles M. Guttman, Kathleen M. Flynn

Stress Relaxation of Poly(Ethylene Naphthalate): Isothermal, Isochronal, and Isostructural Responses

January 1, 1999

Author(s)

M L. Cerrada, G B. McKenna

Study of Aggregates of Fullerene-Based Ionomers in Aqueous Solutions Using Small Angle Neutron and X-ray Scattering

January 1, 1999

Author(s)

U Jeng, T L. Lin, C S. Tsao, C H. Lee, T Canteenwala, L Y. Wang, L Y. Chiang, Charles C. Han

The Effects of Steady Shear on the Order and Orientation of a Diblock Copolymer Melt using In-Situ Small-Angle Neutron Scattering

January 1, 1999

Author(s)

K A. Barnes, F A. Morrison, A Nakatani, J W. Mays

A Precision Capacitance Cell for Measurement of Thin Film Out-of-Plane Expansion I Thermal Expansion

November 1, 1998

Author(s)

Chad R. Snyder, F I. Mopsik

A high sensitivity technique based on a three-terminal parallel plate capacitor for the measurement of the out-of-plane expansion of thin films is presented. The necessary assembly protocols and data reduction techniques for the proper use of this

Demineralizing Effect of Dental Cements on Human Dentin

November 1, 1998

Author(s)

Y Shimada, Y Kondo, S Inokoshi, J Tagami, Joseph M. Antonucci

This study was undertaken to verigy the hypothesis that dentin surfaces are demineralized during placement of four kinds of chemically setting cements (zinc phosphate cement, luting glass-ionomer cement, restorative glass-ionomer cement, and zinc

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