GENERAL PROCEDURE FOR EVALUATING AMORPHOUS SCATTERING AND CRYSTALLINITY FROM X-RAY-DIFFRACTION SCANS OF SEMICRYSTALLINE POLYMERS

被引:266
作者
MURTHY, NS
MINOR, H
机构
[1] Corporate Technology, Allied-Signal Inc., Morristown
关键词
amorphous scattering; crystallinity; semicrystalline polymers; X-ray diffraction;
D O I
10.1016/0032-3861(90)90243-R
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The separation of amorphous and crystalline contributions in diffraction and spectroscopic data is a necessary step in the study of the structure of the less-ordered regions and in the calculation of crystallinity of a semicrystalline polymer. We suggest here that the diffraction pattern of a polymer with a high degree of crystalline order be fitted with easily resolvable crystalline peaks, and the intensity not attributable to the crystalline peaks be regarded as amorphous scattering. This amorphous halo can be used as a template in analysing the diffraction patterns of less-crystalline samples, and to follow changes in the amorphous regions. This method is most useful for polymers for which a completely amorphous sample cannot be easily prepared, and in the analysis of poorly crystallized polymers. The method is illustrated with examples from several polymers. © 1990.
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页码:996 / 1002
页数:7
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