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Computer Capability for the Determination of Polymer Crystallinity by X-Ray Diffraction

Published online by Cambridge University Press:  06 March 2019

Andrew M. Wims ,
Mark E. Myers Jr. ,
Jack L. Johnson  and
Julia M. Carter
Andrew M. Wims
Affiliation:
Analytical Chemistry Department General Motors Research Laboratories Warren, MI
Mark E. Myers Jr.
Affiliation:
Analytical Chemistry Department General Motors Research Laboratories Warren, MI
Jack L. Johnson
Affiliation:
Analytical Chemistry Department General Motors Research Laboratories Warren, MI
Julia M. Carter
Affiliation:
Analytical Chemistry Department General Motors Research Laboratories Warren, MI
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Extract

The physical and mechanical properties of many industrially important polymers are profoundly influenced by their degree of crystallinity; such properties include flex modulus, tensile strength, percent elongation, and impact strength. Commonly used polymers influenced by their crystallinity level include polyethlene, polypropylene, polyesters, and nylons. Many of these materials are above their glass transition temperature at room temperature and would be useless were it not for their crystalline phase which typically has a melting point far above room temperature. The crystalline ‘ regions (domains) in these materials are frequently very small, typically in the nanometer range in diameter. These crystalline domains act as reinforcing fillers (in somewhat the same manner as carbon black In rubber) and give strength to the polymer.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 29: Thirty-Fourth Annual Conference on Applications of X-ray Analysis, August 5-9, 1985 , 1985 , pp. 281 - 290
Copyright
Copyright © International Centre for Diffraction Data 1985

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References

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