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Displaying 1876 - 1900 of 1923

How Nonlinear Viscoelastic Matrix Behavior Influences Interfacial Shear Strength Measurements

July 30, 1999

Author(s)

Gale A. Holmes, Donald L. Hunston, Walter G. McDonough, R C. Peterson

Precise measurements of fiber break regions formed during the single fiber fragmentation testing procedure indicate that the calculated interfacial shear strength (IFSS) or the interfacial shear stress transfer coefficient (I-STC) is dependent on the

Viscoelastic Properties of a Resin Commonly Used in the Single fiber Fragmentation Test

May 13, 1999

Author(s)

Donald L. Hunston, Gale A. Holmes, R C. Peterson

Molecularly Dispersed Dendrimers in a Polymeric Matrix

March 1, 1999

Author(s)

Barry J. Bauer, T J. Prosa, D W. Liu, C L. Jackson, D A. Tomalia, Eric J. Amis

Interpenetrating polymer networks are formed by dissolving poly(amidoamine) dendrimers in 2-hydroxyethyl methacrylate and polymerizing with dendrimer contents between 1 and 25 mass % containing dendrimers from generation 6 through 11. Small angle x-ray

Comparison of Classical and MALDI-TOF-MS Analysis of a Polystyrene Interlaboratory Sample

January 1, 1999

Author(s)

William R. Blair, B M. Fanconi, R J. Goldschmidt, Charles M. Guttman, William E. Wallace, S Wetzel, David L. VanderHart

Over the past several years, the use of MALDI-TOF-MS for analysis of synthetic polymers has increased significantly. As the number of polymer analyses by MALDI has increased, scrutiny of the MALDI results in comparison to classically derived values for Mw

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

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