纳米蒙脱土填充紫外光固化涂层的介质传输行为

采用静态浸泡法绘制了漆膜增重-时间曲线，研究了纳米蒙脱土(nanoMMT)填充紫外光固化涂层的吸水性及纳米蒙脱土用量、环氧丙烯酸酯(EA)与合成活性稀释剂(RD)比例、光固化涂层的固化程度与介质传输行为的关系.结果表明，WEA∶WRD越大、涂层的固化程度越高，涂层的抗介质渗透性能越好.添加纳米蒙脱土能促进涂层中酯键的水解，对涂层的耐介质传输性能不利.

MEDIUM TRANSPORT BEHAVIOR OF UV-CURED COATINGS FILLED WITH NANO-MONTMORILLONITE

Water uptake of UV-cured coating filled by nanomontmorillonite(nano-MMT) were investigated by using static immersion method.The relationship between the behavior of medium permeation and the addition of the amount of nano-MMT,the weight ratio of epoxy acrylate(EA) and the reactive diluent(RD) synthesized by ourselves,curing degree of the UV-cured coating was discussed.The result showed that the medium permeation behavior in the coatings was mainly determined by curing degree and the ratio of W_(EA) to W_(RD).The resistance to medium permeation for the coatings increased with the increase of curing degree and the ratio of W_(EA) to W_(RD),and decrease with the amount of nano-MMT.Owing to the hydrolysis of ester bond in the UV-cured coatings caused by nano-MMT,the resistance to medium permeation for the nano-MMT filled UV-cured coatings became worse.