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Displaying 1 - 25 of 164

Inelastic Neutron Scattering From Filled Elastomers

December 1, 2000
Author(s)
A Nakatani, R Ivkov, P Papanek, H Yang, M Gerspacher
… Of particular interest is the comparison between bound rubber attached to the filler surface and the pure, unbound rubber. A commercial synthetic polyisoprene containing nearly … so that corresponding samples containing purely bound rubber with filler were obtained. The filter analyzer and …

The Influence of Clay and Elastomer Concentration on the Morphology and Fracture Energy in Preformed Acrylic Rubber Dispersed Clay Filled Epoxy Nanocomposites

November 1, 2005
Author(s)
G Balakrishnan, P R. Start, D T. Raghavan, Steven Hudson, D Yebassa
… the morphology and mechanical properties of three-phase, rubber-modified epoxy nanocomposites was studied. … ion exchanged clay to a dispersion of pre-formed acrylic rubber particles in liquid epoxy, so as to minimize alteration to the rubber morphology in the final cured specimen. The state of …

Strain Rate Dependence of Fracture in a Rubber-Toughened Epoxy System

January 1, 2002
Author(s)
D T. Raghavan, J He, Donald L. Hunston, D Hoffman
… The toughening mechanisms in rubber-modified epoxies appear to be viscoelastic in nature … loading rate effect for a new material based on acrylic rubber by measuring the fracture energy in constant … acrylic rubber, epoxy, fracture, r-curve, rate effect, toughening, …

Thermodynamics of the Lipase-Catalyzed Transesterification of 1-Phenyl-1-Alkanols and Butyl Acetate in Organic Solvents

January 16, 2003
Author(s)
Yadu D. Tewari, David J. Vanderah, J D. Rozzell
… of the lipase-catalyzed transesterification reactions of butyl acetate and 1-phenyl-1-alkanols from C 1 to C 4 have … carried out in n-hexane, acetonitrile, 2-butanone, tert-butyl methyl ether, carbon tetrachloride and neat (no solvent … (R)-1-phenylethanol, 1-butanol, benzyl alcohol, butyl acetate, enthalpy, equilibrium constant, lipase …

MATRIX RELAXATION AFTER FRACTURE IN A TOUGHENED EPOXY

December 10, 2008
Author(s)
Aaron M. Forster, Cyril Clerici, Donald L. Hunston
… of a toughened polymer is characterized by cavitated rubber particles and plastic flow of the matrix. This region … epoxy system was measured (DER-332 epoxy toughened with a butyl-nitrile rubber) at one loading rate. The microstructure in and … fracture toughness, epoxy, rubber, polymer relaxation …

Ring Expansion Reactions in the Thermal Decomposition of t-Butyl-1,3-Cyclopentadiene

November 30, 2006
Author(s)
William S. McGivern, Jeffrey A. Manion, Wing Tsang
… The thermal decomposition of t-butyl-1,3-cyclopentadiene has been investigated in single … kinetics, ring expansion, shock tube, soot formation, t-butyl-1, 3-cyclopentadiene … Ring Expansion Reactions in the Thermal Decomposition of t-Butyl-1,3-Cyclopentadiene …

Rubber Modeling Using Uniaxial Test Data

July 1, 2001
Author(s)
G Bradley, P C. Chang, G B. McKenna
… Accurate modeling of severe rubber deformations is now possible with finite element … finite deformation, finite element, mechanical testing, rubber elasticity, strain energy function, Valanis-Landel … Rubber Modeling Using Uniaxial Test Data …

A Thermodynamic and Time Course Study of the Lipase-Catalyzed Transesterification of Benzyl Alcohol and Butyl Acetate in Supercritical Carbon Dioxide Media

August 16, 2004
Author(s)
Yadu D. Tewari, T. Ihara, Karen W. Phinney, M P. Mayhew
… transesterification reaction (benzl alcohol + butyl acetate = benzyl acetate + 1-butanol) has been studied … 1-Butanol, benzyl acetate, benzyl alcohol, butyl acetate, equilibrium constant, lipase, rate of … Lipase-Catalyzed Transesterification of Benzyl Alcohol and Butyl Acetate in Supercritical Carbon Dioxide Media …

Beta-Bond Scission and the Yields of H and CH3 in the Decomposition of i-Butyl Radicals

May 8, 2018
Author(s)
Laura A. Mertens, Jeffrey A. Manion
… The relative rates of C-C and C-H β-scission reactions of i-butyl radicals were investigated with shock tube experiments … to 1250) K and pressures of (200 to 400) kPa. We produce i-butyl radicals from the decomposition of dilute mixtures of … % on the branching fraction for C-H β-scission in the i-butyl radical. While this data agrees with previous high …

A Viscoelastic Constitutive Model for the Creep Response of Polyurethane Rubber

August 1, 1998
Author(s)
V Rouiller, G B. McKenna
… is developed to describe the behavior of a polyurethane rubber provided to NIST by NSWC, Carderock. The model is based on concepts of time-dependent rubber elasticity and single integral models of … Constitutive Model for the Creep Response of Polyurethane Rubber …

Determining the chemical-heterogeneity-corrected molar mass averages and distribution of poly(styrene-co-t-butyl methacrylate) using SEC/MALS/UV/DRI

May 1, 2018
Author(s)
Andre M. Striegel, Imad Haidar Ahmad
… percent styrene) was determined for a poly(styrene-co-t-butyl methacrylate) copolymer. Also determined were the … refractive index increment, molar mass, poly(styrene-co-t-butyl methacrylate) … molar mass averages and distribution of poly(styrene-co-t-butyl methacrylate) using SEC/MALS/UV/DRI …

Matrix Relaxation After Fracture In A Toughened Epoxy

March 3, 2010
Author(s)
Aaron M. Forster, Aurelien Blond, Donald L. Hunston
… The inclusion of phase-separated rubber particles in a brittle thermoset matrix has been shown … fracture toughness, rubber-toughened epoxy, microscopy, AFM, LSCM …

Micro-Deformation in the Fracture of a Toughened Epoxy

February 24, 2014
Author(s)
Donald Hunston, Cyril Clerici, Aurelien Blond, Aaron Forster
… been reported previously while this report focuses on the rubber particles. … rubber-toughened epoxy, plastic deformation, toughness …

Neutron Polarization Analysis for Biphasic Solvent Extraction Systems

June 16, 2016
Author(s)
Ryuhei Motokawa, Hitoshi Endo, Michihiro Nagao, William T. Heller
… containing complexes, comprised of Zr(NO 3 ( 4 and tri-n-butyl phosphate (TBP), to decompose the intensity … Neutron polarization analysis, Solvent extraction, Tri-n-butyl phosphate …

Classical Trajectories and RRKM Modeling of Collisional Excitation and Dissociation of Benzylammonium and tert Butyl Benzylammonium Ions in a Quadrupole-Hexapole-Quadrupole Tandem Mass Spectrometer

March 1, 2010
Author(s)
Vadim D. Knyazev, Stephen Stein
… dissociation of the benzylammonium and the 4-tert butyl benzylammonium ions was studied experimentally in an … without any further adjustments to decomposition of the t butyl benzylammonium ion results in general agreement with … Excitation and Dissociation of Benzylammonium and tert Butyl Benzylammonium Ions in a Quadrupole-Hexapole-Quadrupole …
Displaying 1 - 25 of 164
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