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以4,4’-二苯基甲烷二异氰酸酯和聚醚及双酚A型环氧树脂为原料经共聚合成了聚氨酯(PU)/环氧树脂(EP)互穿聚合物网络(IPNs)。通过改变聚氨酯结构及环氧树脂含量制备系列PU/EP的IPNs,并对其性能进行了研究。研究表明随着聚氨酯中两官能度聚醚用量增加,IPNs体系的亲水性增强、表面自由能增大;此外随着环氧树脂含量增多,整个IPNs体系的疏水性增强;力学性能测试表明,聚氨酯结构以及环氧树脂含量对PU/EP的IPNs材料力学性能影响较大。
Polyurethane (PU) / epoxy (EP) interpenetrating polymer networks (IPNs) were synthesized by copolymerizing 4,4’-diphenylmethane diisocyanate with polyether and bisphenol A epoxy resin. IPNs of series PU / EP were prepared by changing the structure of polyurethane and the content of epoxy resin, and their properties were studied. The results show that with the increase of the amount of bifunctional polyether, the hydrophilicity of IPNs system increases and the surface free energy increases. In addition, with the increase of epoxy resin content, the hydrophobicity of the whole IPNs system is enhanced. The mechanical properties test shows that, Polyurethane structure and epoxy content of PU / EP IPNs material mechanical properties greater impact.