不同比例的s－BPDA／i-BPDA型聚酰亚胺共聚结构与性能关系  

Synthesis and Characterization of Copolyimides from s-BPDA/i-BPDA with Different Molar Ratio

作　　者：王响[1] 张鹏[1] 陈春海[1] 李鹏[1] 王冬佶[1] 党国栋[1] 

机构地区：[1]吉林大学化学学院,麦克德尔米德实验室,长春130012

出　　处：《高等学校化学学报》2010年第11期2289-2292,共4页Chemical Journal of Chinese Universities

基　　金：国家“九七三”计划项目(批准号:2010CB631100);国家“八六三”计划项目(批准号:2007AA03A231)资助

摘　　要：由不同比例的二酐单体3,3',4,4'-联苯四酸二酐(s-BPDA)/2,2',3,3'-联苯四酸二酐(i-BPDA)与二胺单体4,4'-二氨基二苯醚(4,4'-ODA)制得了一系列共聚可溶聚酰亚胺.采用DSC、TGA和拉伸等测试方法对所得共聚聚酰亚胺进行了表征,实验结果表明,所得聚酰亚胺具有优异的力学性能和热稳定性,并且随着i-BPDA含量的增加,聚酰亚胺的溶解性提高,玻璃化转变温度(Tg)升高,中间体聚酰胺酸的固有黏度降低.A series of organosoluble copolyimides was successfully synthesized from the 2,2＇, 3,3＇-bipheny- hetraearboxylie dianhydride （i-BPDA） and 3,3＇,4,4＇-biphenyhetraearboxylic dianhydride （s-BPDA） with aromatic diamine 4,4＇-ODA. The copolyimides were characterized by FTIR, DSC, TGA and DMA. The eopo- lyimides hold superior mechanical properties and show improved solubilities, depending on the i-BPDA content. A regular increase of glass transition temperatures and a decrease of inherent viscosities of copolymers with increasing content of i-BPDA were also observed.

关 键 词：聚酰亚胺 共聚聚酰亚胺 联苯四酸二酐 溶解性 

分 类 号：O631[理学—高分子化学]