Premium
Thermal behavior and reactivities of prepolymers prepared from aromatic biscyanamides and bismaleimide
Author(s) -
Takahashi Akio,
Suzuki Masao,
Suzuki Masahiro,
Wajima Motoyo
Publication year - 1991
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.1991.070430512
Subject(s) - prepolymer , thermosetting polymer , maleimide , polymer chemistry , methylene , materials science , polymerization , melamine , polymer , organic chemistry , chemistry , polyurethane , composite material
Novel polymers obtained by reaction of aromatic biscyanamide and bismaleimide compounds were investigated. By heating 4,4′‐methylene bis( o ‐methylphenylcyanamide) (BMCA) with 4,4′‐methylene bis (phenylmaleimide) (BMI) at 120°C in N,N ‐dimethylformamide (DMF), prepolymers were obtained by the conversion of cyanamide to cyanoguanidine and the addition of an imino group on the double bond of maleimide. The prepolymer showed suitable behavior for thermosetting resin used in molding, i.e., it melted temporarily and then polymerized in an isochronal heating process (5°C/min). On heating above 170°C, the prepolymer could polymerize with ring formation of melamine and isomelamine. The cured product had good heat‐resistant properties.