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Indexed by:期刊论文

Date of Publication:2012-03-01

Journal:POLYMER DEGRADATION AND STABILITY

Included Journals:SCIE、EI

Volume:97

Issue:3

Page Number:460-468

ISSN No.:0141-3910

Key Words:Poly(ether imide); Phthalazinone; Phthalonitrile oligomer; Cure behavior; Thermal stability

Abstract:Three novel series of soluble and curable phthalonitrile-terminated oligomeric poly(ether imide)s containing phthalazinone moiety were synthesized from an excess amount of three dianhydrides and phthalazinone-based diamine, followed by reacting with 4-(3-aminophenoxy)phthalonitrile (APPh) in a two-step, one-pot reaction, respectively. The phthalonitrile oligomers containing phthalazinone moiety were cured in the presence of 4,4'-diaminodiphenylsulfone (DDS). The oligomers and the crosslinked polymers were characterized by DSC, FT-IR and elemental analysis. These phthalonitrile oligomers containing phthalazinone groups were found to be soluble in some aprotic solvents, such as chloroform, pyridine, m-cresol and N-methyl-2-pyrrolidone (NMP). The crosslinked polymers were insoluble in all solvents. The thermal properties of the oligomers and the crosslinked polymers were evaluated using DSC and TGA analysis. The phthalonitrile oligomers showed high glass transition temperatures (T(g)s) in the range of 214-256 degrees C and high decomposition temperatures with 10% weight loss (T-d10%) ranging from 523 to 553 degrees C. The crosslinked polymers showed excellent thermal stability with the 10% weight loss temperatures ranging from 543 to 595 degrees C, but did not exhibit a glass transition temperature upon heating to 350 degrees C. Crown Copyright (c) 2011 Published by Elsevier Ltd. All rights reserved.