SYNTHESIS AND LIQUID-CRYSTALLINE PROPERTIES OF NEW THERMOTROPIC POLYURETHANES

被引：9
作者：
CHIELLINI, E
GALLI, G
TRUSENDI, S
ANGELONI, SA
LAUS, M
FRANCESCANGELI, O
机构：
[1] UNIV BOLOGNA, DIPARTIMENTO CHIM IND & MAT, I-40136 BOLOGNA, ITALY
[2] UNIV ANCONA, DIPARTIMENTO SCI MAT & TERRA, I-60131 ANCONA, ITALY
来源：
MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1994年 / 243卷
关键词：
LIQUID CRYSTAL POLYMER; THERMOTROPIC POLYURETHANE; NEMATIC MESOPHASE; CYBOTACTIC NEMATIC;
D O I：
10.1080/10587259408037766
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The synthesis and liquid crystal behavior of new thermotropic polyurethanes derived from different mesogenic diols, alkylene di[4-(omega-hydroxyalkyloxy-4-oxybenzoyl)oxybenzoate]s, and 2,4-toluenediiso-cyanate are reported. Depending upon the chemical structure of the repeat unit, the polyurethanes formed either one or two mesophases extending over a fairly broad (>60 K) and accessible range of temperature (T-i < 430 K). A cybotactic nematic mesophase was identified in each polyurethane sample.
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页码：135 / 147
页数：13
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