Synthesis and properties of maleimide-terminated polyurethane AB crosslinked polymers II: polyurethane allyl nonyl novolac resin bismaleimide diphenyl methane ABCPs

Maleimide-terminated polyurethane(A-component)/allyl nonyl novolac resin(B- component)/BDM crosslinked polymers (CP) (ABCP) were prepared from polyuret hane prepolymer (PU), phenolic resin, bismaleimide of diphenyl methane (BDM ) and maleimide. The effect of BDM on the compatibility as well as the mech anical and thermal properties of the inhomogeneous polymer networks was inv estigated through differential scanning calorimetric analysis, dynamic mech anical thermoanalysis, tensile strength tests and transmission electron mic roscopy. The results reveal that BDM fails to improve the miscibility. A hi gher content of BDM promotes phase separation, while a lower BDM contents b rings about good tensile strength.