CRYSTAL LIQUID-CRYSTAL TRANSITION IN SINGLE-CRYSTALS OF POLY-HYDROXYBENZOIC ACID

被引：20

作者：

LIU, J ^{[1
]}

GEIL, PH ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT MAT SCI & ENGN,DIV STAT MECH & THERMODYNAM,1304 W GREEN ST,URBANA,IL 61801

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-PHYSICS | 1992年 / B31卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1080/00222349208215510

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Electron diffraction patterns have been obtained from as-polymerized single crystals of phase II of poly-hydroxybenzoic acid as a function of temperature into the liquid-crystalline (lc) state above 350-degrees-C. The patterns in the lc state consist of two near hexagonal patterns rotated by 16-degrees, with streaks connecting the high and low (orthorhombic) patterns over a transition temperature range of ca. 50-degrees. Single crystal patterns have also been obtained from a number of other polymorphs at room temperature before and after heating to 400-degrees-C.

引用

页码：163 / 173

页数：11

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