光固化法制备新型透明高分子材料

Preparation of novel transparent polymer by photo-curing method

以异佛尔酮-二异氰酸酯、聚乙二醇、N-羟甲基丙烯酰胺为主要原料,利用大分子单体合成技术,制备了两端由丙烯酰胺基团封端的聚氨酯大分子单体,研究了大分子单体的固化过程。该大分子单体具有良好的光敏性,在不加光引发剂的情况下,可在紫外光辐射下固化交联,得到一种新型透明高分子材料。该类新材料的透光率为91％以上,热变形温度为188℃,起始热分解温度约为250℃。

Macromonomer of polyurethane having two ends capped with acrylamide radical was prepared, taking isophorone diisocyanate, polyethylene glycol and N-hydroxymethyl acrylamide as major raw materials. Curing process of the macromonomer was discussed. Because of its outstanding photosensitivity, the macromonomer could be cured and crosslinked directly under ultraviolet light radiation in the absence of photoinitiator. This novel transparent material possessed a transmissivity of 91% or higher, thermal deformation temperature of 188 ℃ and heat decomposition temperature of about 250 ℃.