Comparative study on polyimides from 3,3′-and 4,4′-linked diphthalic anhydride

✍ Scribed by Mengxian Ding; Haiying Li; Zhenhua Yang; Yuesheng Li; Jin Zhang; Xuqiang Wang

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 436 KB
• Volume: 59
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19960207)59:6<923::aid-app3>3.0.co;2-r

✦ Synopsis

SYNOPSIS

1,4-Bis(2,3-dicarboxyphenoxy)benzene dianhydride, 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride, bis(2,3-dicarboxyphenoxy)sulfide dianhydride, bis(3,4-dicarboxyphenoxy)sulfide dianhydride, and 2,3,3',4'-tetracarboxy diphenyl sulfide dianhydride were synthesized from 3-chlorophthalic anhydride and 4-chlorophthalic anhydride. Bis(2,3-dicarboxypheny1)sulfone and bis(3,4-dicarboxyphenyl)sulfone were obtained by the oxidation of the corresponding bis(dicarboxypheny1)sulfide by hydrogen peroxide. The polyimides from the dianhydrides mentioned above and 4,4'-oxydianiline were prepared. The properties, such as dynamic mechanical behavior, thermooxidative stability, stress-strain behavior, chemical resistance, and permeability to some gases have been in investigated for the isomeric polyimides.