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Displaying 151 - 175 of 269

High Throughput Flammability Characterization Using Gradient Heat Flux Fields.

December 1, 2005
Author(s)
Jeffrey W. Gilman, Rick D. Davis, John R. Shields, Richard H. Harris Jr.
The quest for small-scale flammability tests useful for predicting large-scale fire test performance is an enduring undertaking. Often, this work is motivated by limited access to larger quantities of samples, in the case of materials development efforts

High Throughput Flammability Characterization Using Gradient Flux Fields

October 1, 2005
Author(s)
Jeffrey W. Gilman, Rick D. Davis, John R. Shields, Richard H. Harris Jr.
The quest for small-scale flammability tests useful for predicting large-scale fire test performance is an enduring undertaking. Often, this work is motivated by limited access to larger quantities of samples, in the case of materials development efforts

Preparation and Flame Resistance Properties of Revolutionary Self-Extinguishing Epoxy Nanocomposites Based on Layered Double Hydroxides

October 1, 2005
Author(s)
Mauro Zammarano, Massimiliano Franceschi, S Bellayer, Jeffrey W. Gilman, Sergio Meriani
Layered double hydroxides/epoxy nanocomposites (LDHs/EP) were prepared from organo modified LDHs, a diglycidyl ether of bisphenol A monomer (DGEBA) and amine curing agents. The organomodified LDHs were obtained by ionic exchange of a magnesium-aluminum

Preparation of Homogeneously Dispersed Trialkyl Imidazolium Compatibilized Multi Walled Carbon Nanotube/Polystyrene Nanocomposites via Melt Extrusion

June 1, 2005
Author(s)
S Bellayer, Jeffrey W. Gilman, Naomi Eidelman, S Bourbigot, X Flambard, D M. Fox, Hugh C. De Long, Paul C. Trulove
Trialkylimidazolium-tetrafluoroborate, (IM) compatibilized, multiwalled carbon nanotubes (MWNT) were used to prepare well dispersed polystyrene (PS) IM-MWNT nanocomposites via melt extrusion. Quantitative TEM image analysis revealed superior dispersion of

Flammability of Polymer Clay Nanocomposites Consortium:Final Report

April 4, 2005
Author(s)
Jeffrey W. Gilman, Takashi Kashiwagi, A B. Morgan, Rick D. Davis, Richard H. Harris Jr., L D. Brassell
In 1997 NIST reported that polymer layered-silicate (clay) nanocomposites exhibit reduced flammability, in the form of reduced heat release rate (HRR). The unique character of this new approach to flame retard polymeric materials was the dual benefit of

Dielectric Spectroscopy During Extrusion Processing of Polymer Nanocomposites: a High Throughput Processing/Characterization Method to Measure Layered Silicate Content and Exfoliation

September 1, 2004
Author(s)
Rick D. Davis, Anthony J. Bur, M M. McBrearty, Y E. Lee, Jeffrey W. Gilman, P R. Start
Dielectric spectroscopy was conducted during extrusion processing of polyamide-6 (PA6) and layered silicate/polyamide-6 nanocomposites. Dielectric dispersion parameters were identified that appear sensitive to layered silicate concentration and degree of

Real-Time Monitoring of Polymer Nanocomposites Composition during Extrusion Compounding

September 1, 2004
Author(s)
Rick D. Davis, Jeffrey W. Gilman, Anthony J. Bur, M M. McBrearty, P R. Start, Young J. Lee
Dielectirc spectroscopy was conducted during extrusion processing of polyamide-6 (PA6) and layered silicate/polyamide-6 manocomposites. Dielectric dispersion parameteers were identified that appear sensitive to layered silicate concentration and degree of

Improved Thermal Stability of Organically Modified Layered Silicates

April 1, 2004
Author(s)
Rick D. Davis, Jeffrey W. Gilman, T E. Sutto, J H. Callahan, Paul C. Trulove, Hugh C. De Long
Bromide containing impurities were found to decrease the thermal stability of quaternary alkyl ammonium modified layered silicates. Improved purification procedures completely removed these bromide anions and led to a 20 C to > 100 C increase in organic
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