Abstract
The modification of a bismaleimide resin with carboxyl-terminated poly (butadiene-co-acrylonitrile) (CTBN), carboxyl-terminated polybutadiene (CTB), and acryloyloxy-terminated poly (butadiene-co-acrylonitrile) (VTBN) was carried out. The effects of the acrylonitrile (AN) content and the terminal groups of the elastomers on prereaction between the bismaleimide and the elastomers, and on mechanical properties, thermal properties, and morphology of the obtained elastomer-modified bismaleimide resins were investigated. The compatibility and the reactivity of the elastomers for the bismaleimide resin increased with increasing AN content of the elastomers. The fracture energy, GIC, of the elastomer-modified bismaleimide resins increased as the elastomer concentration increased and the AN content of the elastomers decreased. The morphology of these resins were examined by means of scanning electron microscopy. A microphase separation was observed for the resin modified with the elastomer of lower AN content.
