Preparation and properties of epoxy-phenolic aldehyde-bismaleimide ternary blend
A ternary resin blend(BPE)and its cured product were prepared by melt blending 4,4'-diphenylmethane bismaleimide(BMI)with polyaromatic ring phenolic resin,polyaromatic ring epoxy resin(NC3000),and promoter 2-phenyl-4-methyl-5-hydroxymethylimidazole(2P4 MHZ),and their properties were evaluated.The research results showed that the BPE ternary resin blend only exhibited one curing behavior,which could be fully cured in the existing epoxy molding compound(EMC)preparation process.Structural characteristic analysis showed that the BPE ternary resin blend had been successfully prepared,and mutual crosslinking reactions had occurred between the ternary resins.The crystalline state and rheological analysis of the ternary resin blend showed that the ternary resin blend exhibited obvious amorphous characteristics.With the increase of temperature,the melt viscosity began to decline,reaching the lowest value at 140-160℃,and then rapidly increased several orders of magnitude with gelation,and there existed a certain processing window at 110-160℃,which was beneficial to the preparation of EMC.With the increase of BMI content,the heat resistance stability of the cured ternary resin was also constantly increasing,and the thermal decomposition temperature of 10%exceeded 430℃.In addition,the introduction of BMI also prolonged the gelation time of the blend,and destroyed the curing and crosslinking of the epoxy/phenolic aldehyde resin system,resulting in increased weight loss during high-temperature thermal aging.
万方数据
维普
