CRYSTAL-STRUCTURE OF SYNDIOTACTIC POLY(4-METHYL-1-PENTENE)

被引：14
|
作者：
DEROSA, C
VENDITTO, V
GUERRA, G
CORRADINI, P
机构：
[1] Dipartimento di Chimica, Università di Napoli Federico II, 80134 Napoli
来源：
POLYMER | 1995年 / 36卷 / 19期
关键词：
POLY(4-METHYL-1-PENTENE); CRYSTAL STRUCTURE; X-RAY DIFFRACTION;
D O I：
10.1016/0032-3861(95)93762-B
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A model for the crystal structure of syndiotactic poly(4-methyl-1-pentene) is presented. According to the present analysis, chains having helical conformations with unit twist t = 210 degrees (1.714 conformational repeat units, each composed of two monomeric units per helix turn) and unit height h = 3.91 Angstrom, corresponding essentially to s(12/7)2 symmetry, are packed in a tetragonal unit cell with a = 18.03 Angstrom. The density is 0.878gcm(-3) with four chains in the unit cell, space group P ($) over bar 4.
引用
收藏
页码：3619 / 3624
页数：6
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