Authors Ghosh, A. ; Banerjee, S. ; Komber, H. ; Schneider, K. ; Häußler, L. ; Voit, B.
Title Synthesis and characterization of fluorinated poly(imide siloxane) block copolymers
Date 18.06.2009
Number 17464
Abstract Five new block copoly(imide siloxane)s have been prepared by reacting two different diamines, 4,4·-bis(p-aminophenoxy)-3,3·-trifluoromethyl terphenyl (APTTFT) and amino-propyl terminated polydimethylsiloxane (APPS), separately with 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride); BPADA. The reactions were conducted by a two pot solution imidization technique. The diamine APTTFT and the dianhydride BPADA composed the hard block segment while APPS and BPADA composed the soft block segment. The soft and hard blocks of different block lengths were generated by different stoichiometric imbalance in two different flasks and the final polymers were obtained by reacting both the blocks together. Different block copoly(imide siloxane)s were prepared on increasing the hard block lengths (DP) from 7 to 12, 18, 23 and 28 and the soft block lengths (DP) from 4 to 6, 8, 10 and 12, respectively. The resulting polymers have been well characterized by NMR, DSC and DMA techniques. The properties of the block copolymers were compared with the analogous random copolymers and homopolyimide prepared without APPS.
Publisher European Polymer Journal
Citation European Polymer Journal 45 (2009) 1561-1569
Tags fluorinated polyimides poly(imide siloxane) glass transition temperature thermal properties mechanical properties polyimides behavior

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