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Displaying 1826 - 1850 of 1882

Study of Ethylene-Propylene Copolymer Thermoreversible Gels

December 1, 1999
Author(s)
C Daniel, T C. Jao, Barry J. Bauer, Eric J. Amis
Molecular structure and rheological properties of ethylene-propylene (EP) random copolymer gels formed in toluene and methylcyclohexane, respectively, have been investigated by small angle neutron scattering (SANS) and oscillatory shear. In both solvents

Small Angle Neutron Scattering of Solutions of Arborescent Graft Polymers

November 1, 1999
Author(s)
S M. Choi, R M. Briber, Barry J. Bauer, A Topp, M Gauthier, L Tichagwa
Small angle neutron scattering was used to measure the size and shape of arborescent graft polymers as a function of generation number in solution. The radius of gyration of arborescent graft polymers was found to be almost independent of temperature in

Numerical Prediction of Permeability Using a Lattice Boltzmann Method and Optical Coherence Tomography

September 23, 1999
Author(s)
Frederick R. Phelan Jr., Joy Dunkers, C G. Zimba, Kathleen M. Flynn, Richard~undefined~undefined~undefined~undefined~undefined Parnas, R C. Peterson, X Li, J G. Fujimoto
A rapid, non-destructive technique called optical coherence tomography (OCT) is used to image the microstructure of an epoxy/e-glass composite. The raw OCT data is processed and converted to a binary image, and then input into a lattice Boltzmann

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

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
Displaying 1826 - 1850 of 1882