STRUCTURAL STUDY ON SYNDIOTACTIC POLYSTYRENE .3. CRYSTAL-STRUCTURE OF PLANAR FORM-I

被引：165

作者：

CHATANI, Y

SHIMANE, Y

IJITSU, T

YUKINARI, T

机构：

[1] TOKYO UNIV AGR & TECHNOL,FAC TECHNOL,DEPT MAT SYST ENGN,KOGANEI,TOKYO 184,JAPAN

[2] IDEMITSU KOSAN CO LTD,CENT RES LABS,KIMITSU,CHIBA 29902,JAPAN

来源：

POLYMER | 1993年 / 34卷 / 08期

关键词：

SYNDIOTACTIC POLYSTYRENE; X-RAY DIFFRACTION; CRYSTAL STRUCTURE; DISORDERED STRUCTURE; POLYMORPHISM;

D O I：

10.1016/0032-3861(93)90319-6

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 crystal structure of a planar zigzag form of syndiotactic polystyrene (planar form I) obtained by annealing as-cast samples from solutions (molecular compounds with the solvents) was studied by X-rays. Crystal data are as follows: orthorhombic system, space group P2(1)2(1)2(1) (no. 19), but finally Pbnm (no. 62), a = 8.81 angstrom, b = 28.82 angstrom, c(chain axis) = 5.06 angstrom, eight monomer units (four chains) per unit cell. Planar form I is different in alignment of the planar zigzag chains from planar form II obtained by melt-crystallization, which belongs to the hexagonal system. Moreover, the crystal structure of planar form I is characterized by a 'stacking fault' in the molecular packing.

引用

页码：1625 / 1629

页数：5

共 15 条

[1] STRUCTURAL STUDY OF SYNDIOTACTIC POLYSTYRENE .1. POLYMORPHISM [J].