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Pair-Density Function of Nano-Scale Morphology in Oriented Polymer Fibers: Application to Nomex Aramid

Published online by Cambridge University Press:  06 March 2019

H. D. Rosenfield  and
R. Barton Jr.
H. D. Rosenfield
Affiliation:
Dupont Experimental Station P.O. Box 80228 Wilmington, De 19880-0228, USA
R. Barton Jr.
Affiliation:
Dupont Experimental Station P.O. Box 80228 Wilmington, De 19880-0228, USA
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Abstract

We have developed a novel method of determining polymer fiber morphology. Analysis of pair-density functions obtained from synchrotron x-ray diffraction patterns with scattering vectors lying in the meridional direction and equatorial plane allows for the determination of crystallite dimensions, volume fractions of crystalline and amorphous phases, and the probability distribution of crystallite c axis orientation relative to the fiber axis. This method is independent of details regarding the structure of the amorphous phase, and may be successfully applied to both highly crystalline and poorly crystalline samples. Here we describe this new polymer fiber morphological analysis technique, and present examples of its application to three NOMEX aramid samples of widely differing morphologies.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 39: Forty-Fourth Annual Conference on Applications of X-ray Analysis, July 31 - August 4, 1995 , 1995 , pp. 523 - 533
Copyright
Copyright © International Centre for Diffraction Data 1995

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References

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