UNIT-CELL SIZE CHANGE OF THE THERMOTROPIC COPOLYESTER-TPA/PHQ/PEHQ UNDER DIFFERENT ANNEALING CONDITIONS

被引：3

作者：

CHENG, SZD ^{[1
]}

WU, ZQ ^{[1
]}

ZHANG, AQ ^{[1
]}

JOHNSON, RL ^{[1
]}

WU, HH ^{[1
]}

机构：

[1] GRANMONT INC, GRANVILLE, OH 43023 USA

来源：

POLYMER | 1990年 / 31卷 / 09期

关键词：

annealing; crystal unit-cell; crystallographic volume; density; fibres; internal stress; reciprocal lattice; wide-angle X-ray diffraction;

D O I：

10.1016/0032-3861(90)90199-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Wide-angle X-ray diffraction (WAXD) experiments show an anomalous change of the crystal unit-cell parameters in the thermotropic copolyester, poly[phenyl-p-phenyleneterephthalate)-co-(1-phenylethyl-p-phenyleneterephthalate)], under different annealing conditions, namely, annealing the fibres with free ends, at fixed length, and under tension. The crystallographic volumes of the crystal unit-cells in the annealed copolyester fibres are larger than those in the as-spun fibres. Density measurements reveal a decrease of the overall density in the annealed fibres. This behaviour is attributed to a partial rearrangement of the large pendant side groups in this copolyester during annealing. © 1990.

引用

页码：1763 / 1767

页数：5

共 18 条

[1] 3-DIMENSIONAL STRUCTURE OF MAIN-CHAIN LIQUID-CRYSTALLINE COPOLYMERS .2. INTERCHAIN INTERFERENCE EFFECTS [J].