Phenylethynyl-terminated Imide Oligomer of Having Pendent Phenylethynyl Group with Good Thermal Stability

doi:10.3969/j.issn.0251-0790.2012.09.042

Abstract

Abstract:

A diamine monomer 3,5-diamino-4'-phenylethynylbenzophenone (DPEB) was synthesized and phenylethynyl-terminated imide oligomers having pendent phenylethynyl group (n=4) was prepared by the reaction of 3,3',4,4'-biphenylenetetracarboxylic dianhydride (s-BPDA), DPEB and 2,5-bis(4-aminophenoxy)-biphenyl(p-TPEQ), and end-capped with 4-phenylethynylphthalic anhydride (PEPA). The imide oligomer had low T_g and provided wide processing window. The cured films were prepared by molding the oligomer powder at 370℃ for 1 h under pressure. DMA results show the introduction of pendent phenylethynyl group increases T_g of the cured film and the retention of storage modulus beyond T_g is promoted.

Key words: Polyimide, Oligomer, Cross-linked pendent group, Phenylethyne, 3,5-Diamino-4'-phenyl ethynylbenzophenone (DPEB)

CLC Number:

O631

TrendMD:

YANG Ming, PAEK Cholhyok, ZHOU Hong-Wei, CHEN Chun-Hai, DANG Guo-Dong. Phenylethynyl-terminated Imide Oligomer of Having Pendent Phenylethynyl Group with Good Thermal Stability[J]. Chem. J. Chinese Universities, 2012, 33(09): 2117.

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