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Preferred orientation in pyrolytic carbons and polymers
Author(s) -
Ergun S.,
Schehl R. R.
Publication year - 1972
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889872010039
Subject(s) - pyrolytic carbon , anisotropy , orientation (vector space) , polymer , materials science , range (aeronautics) , composite material , chemistry , organic chemistry , optics , physics , geometry , pyrolysis , mathematics
It has been found that the relation of integrated intensities of the 00 l reflections of pyrolytic carbons to the uniaxial orientation is amenable to a theoretical treatment. The resulting expression is rather simple and permits the evaluation of commonly used anisotropy factors, such as 〈sin 2 ϕ〉 or the Bacon anisotropy factor, from measurements of integrated intensities at two different orientation angles (ϕ). The applicability of the equation has been tested with data involving 44 pyrolytic carbons covering a wide range of anisotropy. The same relation has also been found to be applicable to a nylon polymer.