Comparative study on polyimides derived from isomeric diphenylsulfonetetracarboxylic dianhydrides. (May 2013)

• Record Type: Journal Article
• Authors: Pei, Xueliang; Chen, Guofei; Hou, Yijia; Fang, Xingzhong
• Is Part Of: High performance polymers. Volume 25:Number 3(2013)
• Page Start: 312
• Page End: 323
• Publication Date: 2013-05
• Subjects: polyimides -- diphenylsulfonetetracarboxylic dianhydride -- structure–property relationships -- isomer/isomerization; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008312463741
• Languages: English
• ISSNs: 0954-0083

Abstract

In this study, three diphenylsulfonetetracarboxylic dianhydride (DSDA) isomers namely 2, 2′, 3, 3′-DSDA (3, 3′-DSDA), 2, 3, 3′, 4′-DSDA (3, 4′-DSDA) and 3, 3′, 4, 4′-DSDA (4, 4′-DSDA) were prepared from the corresponding diphenylthioethertetracarboxylic dianhydride isomers. Based on the three DSDA isomers, a series of isomeric polyimides were prepared. The properties, such as film-forming ability, solubility, wide-angle x-ray diffraction, thermal and mechanical properties as well as rheological behavior, were compared among the isomeric polyimides. It was found that 4, 4′-DSDA-based polyimides had much better film-forming ability than 3, 3′-DSDA- and 3, 4′-DSDA-based polyimides. 3, 4′-DSDA-based polyimides had better solubility than 3, 3′-DSDA- and 4, 4′-DSDA-based polyimides. Furthermore, for a given diamine, the glass transition temperatures of the polyimides from the three DSDA isomers decreased in the order of 3, 3′-DSDA > 3, 4′-DSDA > 4, 4′-DSDA, while the 5% weight loss temperatures in both air and nitrogen atmospheres of the polyimides mainly increased in the order of 3, 3′-DSDA < 3, 4′-DSDA < 4, 4′-DSDA. Moreover, 3, 4′-DSDA- and 4, 4′-DSDA-based polyimides showed much better melt stability than 3, 3′-DSDA-based polyimide.