软质PVC电缆料的辐射交联

Radiation Crosslinking of Soft PVC Cable Compound

以三甲氧基丙烷三甲基丙烯酸酯（ＴＭＰＴＭＡ） 为交联剂，以Ｃｏ６０γ射线为辐照源，研究了偏苯三酸三辛酯（ＴＯＴＭ） 增塑的ＰＶＣ电缆料的辐射交联。结果表明该辐射交联反应符合ＣｈａｒｌｅｓｂｙＰｉｎｎｅｒ 无规交联模型，ＴＭＰＴＭＡ１０ 分，辐照剂量４０ｋＧｙ 是较合适的配方与工艺条件，该材料经辐射交联后拉伸强度增加 ，断裂伸长率下降，１５５ ℃的热老化失重与１２０ ℃热变形率减小。

s Taking TMPTMA as crosslinking agent and Co 66 γ-ray as radiation source,the radiation crosslinking of TOTM plasticized PVC cable compound was studied.The results showed the radiation crosslinking conformed to Charlesby Pinner random crosslinking model.A proper formula and technical condition were that TMPTMA was 10 parts and radiation dose was 40 kGy.After the radiation crosslinking the tensile strength of the compound increased,but the elongation at break decreased,the thermal ageing weight loss at 155℃ and thermal deformation at 120℃ decreased,too.