端丙烯酰胺基光敏性大分子单体的合成及性能研究

以异氟尔酮-二异氰酸酯(IPDI)、聚乙二醇(PEG)、N-羟甲基丙烯酰胺等为主要原料,利用大单体合成技术,制备了两端由丙烯酰胺基团封端的聚氨酯大分子单体。该大分子单体具有良好的光敏特性,将其在紫外光照射下交联固化得到一种新型的透明高分子材料。研究探讨了大单体的固化机理、紫外光辐照时间及光引发剂对大单体固化度的影响,结果表明:该大单体在紫外光灯源下照射3 h,其固化度达73%左右;当向体系中加入1%的光引发剂后,在紫外光灯源下照射6 h,其固化度可达95%左右。

Synthesis and Performance of Photosensitive Macromonomer with Terminal Acrylamide Group

Macromonomer of polyurethane with two ends capped with acrylamide group was prepared using isophorone diisocyanate(IPDI),polyethylene glycol(PEG) and Nhydroxymethyl acrylamide as major raw materials.The macromonomer possessed excellent photosensitivity,and a kind of novel transparent polymer material was synthesized through crosslinking of the macromonomer and curing by ultraviolet radiation.The curing mechanism and the influence of ultraviolet radiation time and photo-initiator on the degree of curing were studied.The results showed that the degree of curing reached about 73% when the macromonomer lain under ultraviolet radiation for 3 h;and the degree of curing reached about 95% when lain under ultraviolet radiation for 6 h and adding 1% of photo-initiator into the macromonomer system.