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Syntheses of an aromatic nitrile ether diamine and the bismaleimide bearing the diamine and the properties of their copolymers with 4,4′‐bismaleimidodiphenylmethane (BMDPM)
Author(s) -
Fang Qiang,
Ding Xuemei,
Wu Xiongying,
Jiang Luxia
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10734
Subject(s) - benzonitrile , diamine , polymer chemistry , materials science , nitrile , ether , polyetherimide , solvent , toluene , chemistry , organic chemistry , polymer , composite material
A new chain‐extension modifier for bismaleimide (BMI), 2,6‐di‐(4‐aminophenoxy)benzonitrile (DAPB), was synthesized through nucleophilic substitution of 2,6‐dichlorobezonitrile by 4‐aminophenol using anhydrous sodium carbonate as an acid acceptor, toluene as a dehydrating agent, and N , N ′‐dimethylacetamide (DMAC) as a dipolar aprotic solvent. Based on the diamine, another modifier for bismaleimide, 2,6‐bis(4‐maleimidophenoxy)benzonitrile (BMPB), was also synthesized, first by the reaction of DAPB with maleic anhydride and then by dehydration. DAPB and BMPB were used to modify a popular commercial BMI, 4,4′‐bismaleimidodiphenylmethane (BMDPM), for improving the shear strength of the resin. The results showed that the shear strength of the DAPB‐modified BMDPM resin was superior to that of either neat BMDPM or the 4,4′‐diaminodiphenylmethane (DADPM)‐modified BMDPM (a commercial modified BMDPM resin system). In addition, the heat resistance of the cured DAPB‐modified BMDPM resin was higher than that of the cured DADPM‐modified BMDPM resin. The excellent properties were also found in the BMPB‐modified BMDPM resin. It was found that the BMPB‐modified BMDPM resin was superior to neat BMDPM in both shear strength and heat resistance. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1317–1327, 2002