X-RAY-DIFFRACTION BY THERMOTROPIC MAIN-CHAIN POLYMERS WITH SIDE GROUPS .2. SEMIFLEXIBLE POLYESTERS

被引：4

作者：

CHIN, HH ^{[1
]}

AZAROFF, LV ^{[1
]}

SAINI, AR ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS,DEPT POLYMER SCI,AMHERST,MA 01003

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 1989年 / 27卷 / 10期

关键词：

X-Ray Analysis - X-Rays--Diffraction;

D O I：

10.1002/polb.1989.090271005

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Semiflexible thermotropic aromatic polyesters with lateral groups were aligned magnetically and mechanically in monodomains after separation into high-molecular-weight (polymer) and low-molecular-weight (oligomer) fractions. Based on the x-ray intensity distributions recorded for a series of seven different substituents in the arylsulfonyl substituted group, a novel smectic structure was determined for H, F, Cl, OCH3, and CH3 in the para position while a normal nematic alignment prevailed when it contained Br or NO2.

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页码：2001 / 2009

页数：9

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