SMALL-ANGLE NEUTRON-SCATTERING BY SEMICRYSTALLIZED CHAINS - EVALUATION OF THE MEAN DIMENSIONS

被引:11
作者
GUENET, JM
PICOT, C
机构
[1] Centre de Recherches sur les Macromolécules, CNRS, 67083 Strasbourg Cédex
关键词
D O I
10.1016/0032-3861(79)90012-0
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 mean dimensions of semicrystallized chains having long crystallized sequences are calculated as functions of the crystallinity. Models of chain incorporated in the monocrystal are defined and their mean dimensions are expressed as functions of the molecular weight of the chain, taking into account the crystalline parameters. The effects of introducing amorphous sequences in the chain are then examined. Finally, the case of a real semicrystallized polymer containing pure amorphous regions is considered. The results are discussed as functions of crystallinity, molecular weight and crystalline parameters of two different polymers: polyethylene and isotactic polystyrene. In particular, it is shown that conformation with long crystallized sequences can lead to a non-variation of the radius of gyration as in Flory's model. © 1979.
引用
收藏
页码:1473 / 1482
页数:10
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