采用以相对分子质量较高的柔性链段——蓖麻油酸和端羧基丁腈橡胶改性的环氧丙烯酸预聚体作为主体树脂,再用顺酐水性化,制备了高性能水性环氧丙烯酸UV固化涂料.对柔性链段的引入量进行了详细讨论,并采用傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)等对产品的结构与性能进行了表征.结果表明:当体系引入的蓖麻油酸含量为20％ ～ 30％(摩尔分数)、丁腈橡胶3％～5％(摩尔分数)时,涂膜的附着力、柔韧性、拉伸强度、耐水性等性能指标均优于未改性的,而当采用这2种混合链段(蓖麻油酸含量为20％,丁腈橡胶含量5％)改性时,预聚物热稳定性有所提高,涂膜各方面性能达到最佳.
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