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用同步法合成了聚醚型聚氨酯/聚甲基丙烯酸甲酯(PU/PMMA)互穿聚合物网络(IPN),以甲基丙烯酸-2-羟基乙酯(HEMA)为网间接枝剂,研究了组成比及HEMA用量对其形态与性能的影响。结果表明,HEMA可使分散相接枝到连续相中形成复合网络,从而改善了相容性。当PU/PMMA=80/20(质量比)时,其动态力学谱上出现一个T_t,断裂伸长率为987％;改变HEMA用量,动态力学谱中两个T_t则随其用量的增加而明显降低,通过电镜观察发现,其细胞状结构变小。
Polyether polyurethane / polymethylmethacrylate (PU / PMMA) interpenetrating polymer networks (IPNs) were synthesized by the synchronous method. With 2-hydroxyethylmethacrylate (HEMA) The effects of composition ratio and HEMA dosage on the morphology and properties were studied. The results show that HEMA can disperse phase grafted into the continuous phase to form a composite network, thus improving the compatibility. When PU / PMMA = 80/20 (mass ratio), there is a T_t on the dynamic mechanical spectrum and the elongation at break is 987%. When the content of HEMA is changed, the two T_t in dynamic mechanical spectrum increase obviously Reduced, observed by electron microscopy found that the cell-like structure becomes smaller.