以聚己内酯三元醇、异佛尔酮二异氰酸酯和羟基丙烯酸酯为原料,合成了一种新型聚氨酯丙烯酸酯.该树脂含有CC双键和未封闭的-NCO基团,可同时进行光固化和热固化反应.研究了不同双键含量对体系成膜性能的影响.结果表明,随着双键含量的上升,体系光固化后的摆杆硬度变大,耐溶剂性、玻璃化转变温度、铅笔硬度提高,但是柔韧性下降.同时发现,后期的热固化对体系的硬度和热性能有补强的作用,但是会在一定程度上导致涂膜的柔韧性下降.
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