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Ternary fluoro‐containing polyimide blends and fluoro‐containing polyimide/polyester blends
Author(s) -
Chung TaiShung,
Foley Paul,
Jaffe Michael
Publication year - 1997
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199709)8:9<537::aid-pat683>3.0.co;2-t
Subject(s) - diamine , miscibility , polyimide , materials science , polymer chemistry , ternary operation , polymer , composite material , layer (electronics) , computer science , programming language
Two ternary miscible fluoro‐polyimide blends have been identified. They are 6FDA‐3,3′‐6F‐diamine/6FDA‐4,4′‐ F ‐ diamine/BTDA ‐ 4,4′ ‐ 6FDA blend and 6FDA ‐ 3,3′ ‐ 6F ‐ diamine/6FDA ‐ 4,4′ ‐ 6F ‐ diamine/ODPA ‐ PMDA ‐ 4,4′‐6F‐diamine blend (6FDA is 2,2′‐bis(3,4′‐dicarboxy‐ phenyl)hexafluoro propane dianhydride, 6F‐diamine is 2,2′‐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 (glycol‐modified polycyclohexanedimethanolterephthalate) form‐ ing miscible blends have also been discovered. These surprising results suggest that hexafluoro‐isopropylidene‐group containing polyimides are quite intermolecular active and the 1,4‐cyclohexane dimethanol component in PCTG 5445 may also offer unique miscibility capability. © 1997 John Wiley & Sons, Ltd.