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The Application of X-Ray Diffraction Method to the Measurement of Crystal Deformation and Crystal Modulus of High Polymers

Published online by Cambridge University Press:  06 March 2019

Katsuhiko Nakamae  and
Takashi Nishino
Katsuhiko Nakamae
Affiliation:
Department of Industrial Chemistry, Faculty of Engineering Kobe University, Rokko, Nada, Kobe 657, Japan
Takashi Nishino
Affiliation:
Department of Industrial Chemistry, Faculty of Engineering Kobe University, Rokko, Nada, Kobe 657, Japan
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Abstract

Elastic modulus EI of crystalline regions of various high polymers in the direction parallel to the chain axis were measured using an X-ray diffraction method. The crystal deformation can be detected directly by the diffraction peak shift as a function of applied constant stress. The stress in the crystalline regions is assumed to be equal to that applied to the specimen. The validity of this assumption has been proven experimentally for polyethylene, poly(p-phenylene terephthalamide) and so on. The EI values were discussed in relation to molecular conformation and deformation mechanism of the chains.

Type
VII. Stress Determination by Diffraction Methods
Information
Advances in X-Ray Analysis , Volume 35 , Issue A: First Pacific-International Congress on X-ray Analytical Methods (PICXAM). Fortieth Annual Conference on Applications of X-ray Analysis, August 7-16, 1991 , 1991 , pp. 545 - 552
Copyright
Copyright © International Centre for Diffraction Data 1991

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