Authors Ghosh, A. ; Banerjee, S. ; Häußler, L. ; Voit, B.
Title New fluorinated poly(imide siloxane) random and block copolymers with variation of siloxane loading
Date 07.10.2010
Number 25063
Abstract Several new random and block copoly(imide siloxane)s have been prepared by the solution polycondensation of commercially available 4,4'-oxydianiline (ODA) and amino-propyl terminated polydimethylsiloxane (APPS) with 4,4'-(hexafluoro-isopropylidene)diphthalic anhydride (6FDA). The siloxane loading was kept to 10, 20, 30, 40 and 50 wt% in the copolymers. The random copolymers were prepared by a one pot solution imidization technique, and two pot solution imidization technique was adopted for the synthesis of the block copolymers. The diamine ODA and the dianhydride 6FDA composed the hard block segment, while APPS and 6FDA composed the soft block segment. The hard block length was kept constant while the soft block lengths were varied by varying the siloxane loading. Accordingly, block copoly(imide siloxane)s were prepared on increasing the soft block lengths (DP) from 3 to 6, 10, 18 and 36 for fixed hard block length of 22. The resulting polymers have been well characterized by IR, NMR and GPC techniques. Thermal and mechanical properties of the random and block copolymers were compared with the already reported homopolyimide without siloxane moiety.
Publisher Journal of Macromolecular Science - A: Pure Applied Chemistry
Citation Journal of Macromolecular Science - A: Pure Applied Chemistry 47 (2010) 671-680
Tags fluorinated polyimides poly(imide siloxane) glass transition temperatures thermal properties mechanical properties dielectric-properties gas separation polyimides dianhydrides

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