Melt processable copolyimides based on 4,4′-bis(3-aminophenoxy)biphenyl

Add time:09/28/2019    Source:sciencedirect.com

Copolyimides based on 4,4′-bis(3-aminophenoxy)biphenyl (abbreviated to BAB) and pyromellitic dianhydride (PMDA) were synthesised with 4,4′-oxydianiline (4,4′-ODA) and/or 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA). Basic property and melt processability of synthesised copolyimides were investigated. Crystallisation property of these copolyimides were dependent on contents of 4,4′-ODA and/or BPDA. Melt processability of copolyimides obtained from BAB, 4,4′-ODA and PMDA were dependent on contents of 4,4′-ODA. Melt viscosities and Tg's of copolyimides obtained from BAB, PMDA and BPDA were decreased according to increase of BPDA contents.

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