新型双马来酰亚胺基体树脂及其玻璃布层压板的制备与性能

以糠醇、甲苯二异氰酸酯（ＴＤＩ－２０／８０）和二苯甲烷双马来酰亚胺（ＢＭＩ）为原料，采用由Ｄｉｅｌｓ－Ａｌｄｅｒ加成反应合成的含有氨酯键的新型双马来酞亚胺ＢＭＵ－Ｔ作为二苯甲烷双马来酰亚肢的增韧改性剂．通过ＢＭＵ－Ｔ与二苯甲烷双马来酰亚胺以不同比例简单混合得到增韧改性的新型双马来酰亚胺基体树脂；用丙酮和乙二醇单甲醚作为混合溶剂制备了贮存稳定性能优良的树脂溶液和玻璃布预浸料。压制得到的玻璃布层压板具有良好的力学性能和电气性能．１５５℃下的弯曲强度保留率可以达到９０％以上，而且对甲苯、饱和氯化钠水溶液及１０％的盐酸具有很好的耐腐蚀性能。

Preparation and Properties of New Bismaleimide MatrixResins and Glass Cloth Reinforced Laminates

New bismaleimide with urethane linkages (BMU-T ) has been synthesized by means ofDiels-Alder reaction of bisfuranylmethylcarbamatc with 4, 4' -bismaleimidodi-- phenylmethane(BMI ). By mixing BMU-T with BMI in different ratio, a series of toughened bismaleimlde matrix resins and glass cloth reinforced laminates were prepared. The thermal stability of toughened bismaleimide matrix resins, store stability of toughened bismaleimide matrix resins in actonand ethylene glycol monomethyl ether as mixed solvent and mechanical properties of glass clothreinforced laminates have been investigated. It is proved that bismaleimide with urethane linkageis an effective toughening modification agent for 4, 4'-bismaleimidodiphenylmethane, the toughness modified bismaleimide matrix resins have not only excellent solubility but also moderate thermal stability. Glass cloth reinforced laminates have good mechanical, dielectric and heat resistant properties, the fie-cural strength retention can be above 90 % at 15o C