为了改善环氧丙烯酸酯光固化膜的性能,以二苯基碘六氟磷酸盐(DPI·PF6)为引发剂,对甲基丙烯酸缩水甘油酯(GMA)/环氧丙烯酸酯(EAR)进行自由基-阳离子混杂光固化.采用红外光谱(FT-IR)和原子力显微镜(AFM)研究了其固化过程和形态,并对GMA/EAR混杂固化膜的凝胶率、漆膜力学性能、热性能及动态力学行为进行了表征.结果表明:GMA/EAR混杂固化体系的最佳固化时间为3 min,GMA的加入提高了EAR起始固化阶段的转化率,但最大凝胶率基本不变;随着GMA的加入,涂膜的柔韧性和附着力提高,但铅笔硬度和耐热性下降;玻璃化温度Tg和储存模量E随着GMA含量的增加先增加后下降,在GMA含量为20％时,Tg增加了15.15℃,在GMA含量为5％时,储存模量增加了16.83％.AFM分析表明EAR/GMA体系具有较好的强迫相容性,形成了均相互穿网络体系.
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