Ternary fluoro-containing polyimide blends and fluoro-containing polyimide/polyester blends

✍ Scribed by Tai-Shung Chung; Paul Foley; Michael Jaffe

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 275 KB
• Volume: 8
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199709)8:9<537::aid-pat683>3.0.co;2-t

✦ Synopsis

Two ternary miscible fluoro-polyimide blends have been identified. They are 6FDA-3,3Ј-6F-diamine/6FDA-4,4Ј-6F -diamine/BTDA -4,4Ј-6FDA blend and 6FDA -3,3Ј-6Fdiamine/6FDA -4,4Ј -6F -diamine/ODPA -PMDA -4,4Ј-6F-diamine blend (6FDA is 2,2Ј-bis(3,4Ј-dicarboxyphenyl)hexafluoro propane dianhydride, 6F-diamine is 2,2Ј-bis(3-aminophenyl) hexafluoro propane). Their miscibility probably arises from the fact that their diamine parts have hexafluoro isopropylidene groups, their dianhydride parts have similar bond angle, space, rigidity and length. Several 6FDA-polyimides and PCTG 5445 (glycolmodified polycyclohexanedimethanolterephthalate) forming miscible blends have also been discovered. These surprising results suggest that hexafluoro-isopropylidenegroup containing polyimides are quite intermolecular active and the 1,4-cyclohexane dimethanol component in PCTG 5445 may also offer unique miscibility capability.