缩合聚酰亚胺BTDA-ODA的热力学及热稳定性研究Experimental.PDF

化学通报 2002 年 第65 卷 w033 缩合聚酰亚胺BTDA-ODA 的热力学及热稳定性研究 1,2* 2 2 2 2 宋永吉 孟霜鹤 王复东 孙彩霞 谭志诚 1 2 ( 北京石油化工学院化工系 北京 102600 中国科学院大连化学物理研究所 大连 116023) 摘 要 由 3, 3, 4, 4- 二苯甲酮四酸二酐(benzophenone-3, 3, 4, 4-tetracarboxylic acid dianhydride 简称 BTDA) 和4, 4-二氨基二苯醚(4, 4-diaminodiphenyl ether 简称ODA)缩合制备了 聚酰亚胺BTDA-ODA 样品 通过低温量热的方法研究了其热容及低温热稳定性 同时由热容数据计 算了以标准状态 298.15 K 为基准的 在80 K 到400 K 温度范围内的热力学数据 通过热分析的 方法 TG DSC 研究了其高温热稳定性和热分解特性 关键词 聚酰亚胺 热力学 热分析 热稳定性 低温量热 Experimental Study on the Thermodynamics and Thermal Stability of Polyimide BTDA-ODA Song Yongji a,b, a ( School of Chemical and Material Engineering, Beijing Institute of Petrochemical Technology, Beijing 102600) b b b b Meng Shuanghe , Wang Fudong , Sun Caixia , Tan Zhicheng b ( Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023) Abstract In the present study polyimide BTDA-ODA sample was prepared by polycondensation or step-growth polymerization method. Its low temperature heat capacities were measured by an adiabatic calorimeter in the temperature range between 80 K and 400 K. No thermal anomaly was found in this temperature range. A DSC experiment was conducted in the temperature region from 373 K to 673 K. There was no phase change in this temperature range except a glass transition at 420.16 K and an elasto-vi