PVC/三甲基丙烯酸三羟甲基丙烷酯/二苯甲酮体系紫外光辐射交联

Ultraviolet irradiation crosslinking of PVC/trimethylol propane trimethacrylate/ diphenyl ketone system

采用自制的紫外光辐照装置，对厚度为０．１５ｍｍ的ＰＶＣ［交联剂为三甲基丙烯酸三羟甲基丙烷酯（ＴＭＰＴＭＡ），光敏剂为二苯甲酮（ＢＰ）］膜，在Ｎ２气氛中进行辐射交联，其交联反应近似为一级反应。较佳交联条件为：ＰＶＣ１００份，ＢＰ１份，ＴＭＰＴＭＡ１０～１５份，９０℃，８０ｓ。紫外光交联产生的降解副作用（降解交联比为１．０８）比高能辐射交联（降解交联比为１．４５）的弱。

The irradiation crosslinking was carried out on a PVC [crosslinking agent trimethylol propane trimethacrylate(TMPTMA),photosensitizer diphenyl ketone(BP)]membrance of thickness 0.15 mm.The crosslinking raction was approximately first order reaction.The optimum conditions of crosslinking were PVC 100 phr,BP 1 phr,TMPTMA 10～15 phr,90℃and 80 s.The side effect of degradation by the ultraviolet irradiation crosslinking was weaker than that by the high energy irradiation crosslinking.