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Search Publications by: Chad R. Snyder (Fed)

Displaying 101 - 125 of 157

Morphological Changes in Thin Polypropylene Films Induced by 4-Biphenyl Carboxylic Acid

October 16, 2008

Author(s)

Marlon L. Walker, Chad R. Snyder, Naomi Eidelman, E S. Etz, A P. Smith, Alamgir Karim, Eric J. Amis

The crystallization behavior of thin polypropylene films both neat and containing a nucleating agent, 4-biphenyl carboxylic acid, was investigated by optical microscopy, atomic force microscopy, infrared spectroscopy and Raman spectroscopy. High-throughput

A Methodology for Detecting Interfacial Debonding in Clay/Epoxy Nanocomposites

July 1, 2006

Author(s)

Jae Hyun Kim, Gale A. Holmes, Chad R. Snyder

Ballistic Fibers: A Review of the Thermal, Ultraviolet, and Hydrolytic Stability of the Benzoxazole Ring Structure

April 10, 2006

Author(s)

Gale A. Holmes, Kirk D. Rice, Chad R. Snyder

Polymers Division FY 2005 Programs and Accomplishments

March 1, 2006

Author(s)

Eric J. Amis, Chad R. Snyder

No Abstract Included.

Quantifying the Directional Parameter of Structural Anisotropy in Porous Media

January 1, 2006

Author(s)

Martin Y. Chiang, Xianfeng Wang, Forrest A. Landis, Joy P. Dunkers, Chad R. Snyder

Dielectric Properties of Nylon 6/Clay Nanocomposites From On-Line Process Monitoring and Off-Line Measurements

July 1, 2005

Author(s)

N Noda, Y E. Lee, Anthony J. Bur, Vivek Prabhu, Chad R. Snyder, S C. Roth, M M. McBrearty

Nylon 6/ clay nanocomposites were studied by dielectric relaxation spectroscopy (DRS) to correlate morphology and microstructure with relaxation behavior of the polymer matrix at the molecular level. Two types of microstructure, agglomerated and exfoliated

Polymers Division FY 2004 Programs and Accomplishments

September 1, 2004

Author(s)

Eric J. Amis, Chad R. Snyder

The programs and accomplishments of the NIST Polymers Division for the fiscal year 2004 are described.

Monte-Carlo Simulator for the Failure Process and Energy Release Rate of Unidirectional CFRP a Different Temperatures

April 1, 2004

Author(s)

Xianfeng Wang, Martin Y. Chiang, Chad R. Snyder

This paper presents an analytical approach that combines the modified shear-lag model and the Monte-Carlo simulation technique to simulate the fracture behavior, including the failure process and energy release rate, for unidirectional fiber-reinforced

A Simple Methodology for Observing Mechanical Properties of Nanocomposites. Part 2: Investigation of Interfacial Properties in E-Glass Fiber Model Composites

February 20, 2004

Author(s)

Jae Hyun Kim, Gale A. Holmes, Chad R. Snyder

The fiber/matrix interfacial shear strength (IFSS) and the fiber/matrix interphase fracture toughness are critical parameters that control failure initiation and crack propagation in composites. In spite of this importance, most IFSS test methods ignore

Monte-Carlo Simulation for the Fracture Process And Energy Release Rate of Unidirectional Carbon Fiber-Reinforced Polymers at Different Temperatures

January 1, 2004

Author(s)

X Wang, Martin Chiang, Chad R. Snyder

MSEL FY 2003 Programs and Accomplishments: Polymers Division

September 1, 2003

Author(s)

Eric J. Amis, Chad R. Snyder

The programs and accomplishments of the NIST Polymers Division for the Fiscal year 2003 are described.

Proton NMR Characterization of Room-Temperature Aging After Modest Thermal Cycling in Isotactic Polypropylenes

July 1, 2003

Author(s)

David L. VanderHart, Chad R. Snyder

An proton NMR method, based on simple Bloch-decay spectra in the solid state, is presented that enables one to follow, with excellent sensitivity, structural changes associated with aging in semicrystalline polymers whose Tg is well below the aging

Proton NMR Characterization of Room-Temperature Aging in Isotactic Polypropylene and Ethylene/Octene Copolymers

January 1, 2003

Author(s)

David L. VanderHart, Chad R. Snyder, R G. Alamo

In this paper, we utilize the relatively high sensitivity of proton NMR to revisit a well recognized problem of ambient-temperature aging in a couple of semicrystalline polymers, isotactic polypropylene (iPP) and 2 ethylene/octene (EO) copolymers, all of