SEGMENTED POLYURETHANE ELASTOMERS WITH LIQUID-CRYSTALLINE HARD SEGMENTS .3. INFRARED SPECTROSCOPIC STUDY

被引：24

作者：

TANG, WM ^{[1
]}

MACKNIGHT, WJ ^{[1
]}

HSU, SL ^{[1
]}

机构：

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

来源：

MACROMOLECULES | 1995年 / 28卷 / 12期

关键词：

D O I：

10.1021/ma00116a032

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Segmented liquid crystalline polyurethanes (LCPUE) have been studied by infrared spectroscopy. The nematic liquid crystalline hard domains act as physical cross-links and can be oriented by the application of mechanical strain. The orientation function achievable in the hard segments results from the combination of mechanical strain and stress-softening, Furthermore, elastic deformation induces the rearrangement of some hard segments in the mesophase into a more ordered packing. High-temperature infrared spectra have been correlated with thermal transitions of the LCPUE, and a liquid-liquid microphase-separated morphology above the isotropization of the mesophase appears to exist.

引用

页码：4284 / 4289

页数：6

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