可UV固化的超支化聚氨酯丙烯酸酯的合成与表征(英文)

Synthesis and Characterization of UV-curable Hyperbranched Polyurethane Acrylate

通过两步法合成了可UV固化的超支化聚氨酯丙烯酸酯(HBUA)。用SEC、FT-IR、1H-NMR和TG对HBUA进行表征,并测试了其UV固化膜的机械性能。结果表明:HBUA的分子量分布系数为2.31,丙烯酸端基改性程度为79.8%。HBUA的粘度较低有利于混合及涂布。UV固化膜具有高的硬度和良好的柔韧性。

The UV-curable hyperbranched polyurethane acrylate （HBUA） with a multi-hydroxyl functional hyperbranched polyester was synthesized via a two-step procedure. The products were characterized by SEC, FT-IR, 1H- NMR and TG. The mechanical properties of UV-curIng HBUA films were also investigated. It is found that the polydispersity index of HBUA is 2.31 and the endcapped degree of acrylation is 79.8%. The viscosity of HBUA is relatively low in favor of mixing and spreading. The UV-curing films exhibit high hardness and good flexibility.