新型聚2,5-噻吩二羧酸乙二醇酯的合成与表征  

Synthesis and characterization of novel poly(ethylene 2,5-thiophenedicarboxylate)

作　　者：郑威[1] 兰建武[1] 杨琴 石坤[1] 古隆 Zheng Wei;Lan Jianwu;Yang Qin;Shi Kun;Gu Long(College of Light Industry ＆ Food Engineering,Sichuan University,Chengdu 610065)

机构地区：[1]四川大学轻纺与食品学院,成都610065

出　　处：《化工新型材料》2018年第9期183-186,共4页New Chemical Materials

摘　　要：通过直接酯化法,以2,5-噻吩二羧酸(TDCA)和乙二醇(EG)为原料,钛酸丁酯为催化剂,合成了新型的聚2,5-噻吩二羧酸乙二醇酯。采用红外光谱(FT-IR)、核磁共振氢谱(1 H-NMR)、差示扫描量热法(DSC)、热重分析(TGA)、电子单纤强力仪对制得的聚2,5-噻吩二羧酸乙二醇酯和纤维进行了测试。研究结果表明:2,5-噻吩二羧酸乙二醇酯的玻璃化转变温度为63.2℃,熔点为185.5℃,起始热分解温度(失重率2%条件下)为353.9℃,主要失重温度为412℃,具有良好的热稳定性;2,5-噻吩二羧酸乙二醇酯纤维的断裂强度最高可达2.92cN/dtex。Novel poly（ethylene 2,5-thiophenedicarboxylate）was synthesized via direct esterification method based on 2,5-thiophenedicarboxylic acid and ethylene glycol.Tetrabutyl titanate was used as catalyst.The behaviour of polymer and fibers were studied by FT-IR,1 H-NMR,DSC,TGA and single fiber strength tester.The results of DSC showed that the glass transition temperature（Tg）and the melting temperature（Tm）of polyester were 63.2 and185.5℃,respectively.The initial thermal decomposition temperature（under a weight loss rate of 2%）was 353.9℃.Moreover,the maximum decomposition temperature was about 412℃,which indicated it also had good thermal stability.The fracture strength of polyester could reach to 2.92 cN/dtex as the draw ratio rising.

关 键 词：2 5-噻吩二羧酸 聚2 5-噻吩二羧酸乙二醇酯 直接酯化 

分 类 号：O633.5[理学—高分子化学]