| 液晶聚酯与环氧嵌段共聚物的合成及表征 |
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| 引用本文： | 谭松庭,韦春,王勇,王霞瑜.液晶聚酯与环氧嵌段共聚物的合成及表征[J].高分子学报,2002(2):249-252. |
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| 作者姓名： | 谭松庭 韦春 王勇 王霞瑜 |
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| 作者单位： | 1. 湘潭大学高分子材料研究所,湘潭,411105;教育部聚合物复合材料及功能材料重点实验室,广州,510275
2. 湘潭大学高分子材料研究所,湘潭,411105 |
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| 基金项目： | 湖南省教委资助项目 (项目号 99C10 9)，湖南省自然科学基金资助项目 (基金号 0 0JJY2 0 12 ) |
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| 摘 要： | 近年来 ,人们利用高分子液晶作为热固性环氧树脂的改性剂 ,不仅可以提高环氧树脂的韧性和强度 ,而且可以改善其热性能 ,为制备高性能的环氧树脂提供了一条新的途径1,2 ] .目前报道所使用的液晶聚合物大多为液晶聚酯3 ] 或液晶性聚氨酯4] ,这些液晶聚合物与环氧树脂由于存在相容性不好的问题 ,给其实际应用带来了困难 .为了改善二者的相容性 ,本文采用溶液法合成了末端带有反应活性基团的聚酯型液晶聚合物 ,将它再与双酚Ａ环氧预聚物反应 ,制得了高分子液晶环氧嵌段共聚物 ,其合成路线如下 :2ＨＯＣＯＯＣＨ3+ ＨＯ(ＣＨ2 ) 6 ＯＨ Ｈ…
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| 关 键 词： | 液晶聚酯 环氧 嵌段共聚物 |
| 修稿时间： | 2001年6月12日 |
SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTALLINE POLYESTER AND EPOXY BLOCK COPOLYMER |
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| TAN Songting ,WEI Chun ,WANG Yong ,WANG Xiayu.SYNTHESIS AND CHARACTERIZATION OF LIQUID CRYSTALLINE POLYESTER AND EPOXY BLOCK COPOLYMER[J].Acta Polymerica Sinica,2002(2):249-252. |
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| Authors: | TAN Songting WEI Chun WANG Yong WANG Xiayu |
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| Institution: | TAN Songting 1,2,WEI Chun 1,WANG Yong 1,WANG Xiayu 1 |
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| Abstract: | A liquid crystalline block copolymer (BCPE) was synthesized from bis phenol A epoxy oligomer and liquid crystalline polyester (PBHT) which was prepared from polyhexamethylene bis (4 oxybenzoates) and terephthaloyl dichloride by solution polymerization.The intrinsic viscosity ( η inh ) of the polymers was determined using an ubbelohde viscometer in phenyl hydroxide/1,1,2,2 tetrachloroethane mix solvent (1:1) at 30℃, and the results showed that the η inh values of PBHT and BCPE are 0.16 dL/g and 0.46 dL/g respectively. FTIR analysis identified the reaction between bis phenol A epoxy oligomer and PBHT. The crystalline properties of polymers were investigated with DSC and WAXD, and the results found that the crystallinity of BCPE is inferior to that of PBHT due to addition of amorphous epoxy. Thermotropic liquid crystalline nematic phase textures of polymers were observed under a polarizing microscope with hot stage. |
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| Keywords: | Liquid crystalline polyester Epoxy Block copolymer |
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