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Recent Developments in the Measurement of Orientation in Polymers by X-Ray Diffraction

Published online by Cambridge University Press:  06 March 2019

Zigraond W. Wilchinsky
Zigraond W. Wilchinsky*
Affiliation:
Esso Research and Engineering Company Linden, N. J.
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Abstract

From pole figure data, the orientation of a crystallographic direction R in any reference direction Q in a sample can be quantitatively expressed by the average <cos2σ>, where σ is the angle between Q and R in a crystal. In general, <cos2σ> can be evaluated in terms of the experimental averages <cos2ϕhkl> whereϕhkl is the angle between Q and the normal to the (hkl) planes. The number of independent <cos2ϕhkl> measurements needed varies from one to five depending on the crystal system, hkl indices, and other factors discussed. Experimental techniques found useful for measuring <cos2φ> are described.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 6: Eleventh Annual Conference on Applications of X-ray Analysis, August 8-10, 1962 , 1962 , pp. 231 - 241
Copyright
Copyright © International Centre for Diffraction Data 1962

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