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Synthesis and properties of an easy‐processable bismaleimide thermoset resin
Author(s) -
Winter H.,
Mostert H. A. M.,
Tholen M. G. W.
Publication year - 1992
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.1992.070450310
Subject(s) - maleic anhydride , materials science , acetic anhydride , maleimide , thermosetting polymer , flexural strength , flexural modulus , acetone , polymer chemistry , acetamide , styrene , methacrylate , octane , viscosity , copolymer , composite material , catalysis , organic chemistry , chemistry , polymer
Reaction of methylenedianiline and maleic anhydride in acetone, followed by cyclodehydration in the presence of acetic anhydride and 1,4‐diazabicyclo [2.2.2] octane as a catalyst, affords a mixture of compounds, Desbimid, with maleimide, isomaleimide, and acetamide groups. Dissolution of this mixture in styrene and 2‐hydroxyethyl methacrylate results in clear liquid resins. The viscosity of the formulated resins ranges from 100–1700 mPas at 25°C depending on the concentration of Desbimid. These systems can be processed and cured at ambient temperatures until demoulding and postcured at temperatures up to 200 or 250°C. The flexural modulus, flexural strength, and elongation at break of a number of cured formulations are found between 3500–3800 N/mm 2 , 90–115 N/mm 2 , and 2.7–3.5%, respectively.