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THERMAL CHARACTERIZATION OF POLYAMINOBISMALEIMIDE PREPOLYMERS

Polyaminobismaleimide prepolymers were obtained by a Michael addition reaction of a 4,4′-diaminodiphenylmethane (DDM) to 4,4′-bismaleimidodiphenylmethane (BMI) by melt polymerization, in various molar ratios of DDM:BMI. The thermal parameters of the polyaddition reaction and the thermal polymerization were evaluated by differential scanning calorimetry (DSC). The DDM:BMI molar ratio and the reaction time influence the residual amine groups and number-average molecular weight (Mn).