Polymorphism of syndiotactic poly(p-methylstyrene): Oriented samples

被引：35

作者：

DeRosa, C

Petraccone, V

Guerra, G

Manfredi, C

机构：

[1] Dipartimento di Chimica, Univ. di Napoli 'Federico II', 80134 Napoli

来源：

POLYMER | 1996年 / 37卷 / 23期

关键词：

syndiotactic poly(p-methylstyrene); polymorphism; oriented samples;

D O I：

10.1016/0032-3861(96)00353-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Possible routes for obtaining oriented fibres of the various known crystalline forms of syndiotactic poly(p-methylstyrene) are described. These routes include solvent diffusion and/or annealing on mesomorphic fibres. The X-ray fibre diffraction patterns show that form I, form II and all the clathrate forms are characterized by chains with helical s(2/1)2 conformation and repeating distance of approximate to 7.8 Angstrom, while the mesomorphic form (form IV), form III as well as a new crystalline form (form V), are characterized by chains with trans planar conformation and repeating distance of approximate to 5.1 Angstrom. Copyright (C) 1996 Elsevier Science Ltd.

引用

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页码：5247 / 5253

页数：7

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