Construction of High-performance Crosslinked Poly(indole ether ketone)Driven by Cation-π Interaction
The glass transition temperature and thermal stability were two important physical properties of polymers,which affected the application fields of the materials.Crosslinking was considered as one of the important methods to improve the glass transition temperature and thermal stability.Linear poly(indole ether ketone)(PINEK)had been obtained by the condensation polymerization of 4,4-difluoro diphenylmethanone with 4-hydroxyindole via nucleophilic substitution reaction.The cation-π cross-linked K-PINSU was prepared by soaking PINEK in alkaline aqueous solution.Comparing with the traditional linear poly(ether ether ketone)(PEEK)and PINEK,the K-PINSU shows higher glass transition temperature(Tg=251℃)and decomposition temperature(Td=501℃).
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