多官能团不饱和单体对聚氯丁二烯辐射交联的敏化效应初探

THE SENSITIZING EFFECT OF POLYFUNCTIONAL MONOMERS ON THE RADIATION CROSSLINKING OF POLYCHLOROPRENE

分别将９种多官能团单体（ＰＦＭ）混炼入聚氯丁二烯中，然后用加速器产生的电子束辐照引发其交联反应。结果表明，产物的交联密度（１／Ｍｃ）线性正比于单体初始含量（Ｃ０）和辐射吸收剂量（Ｄ），即１／Ｍｃ＝（Ａ＋ＫＣ０）Ｄ，其中Ａ、Ｋ为常数，Ｋ值随ＰＦＭ的比不饱和度（每１００ｇＰＦＭ所含双键的摩尔数）增加而提高。含有４Ｇ（聚甘醇２００二甲基丙烯酸酯）或ＵＡ１０１Ｈ（六亚甲基二异氰酸酯类）的交联样品其抗张强度最佳。

Various polyfunctional monomers (PFM) were respectively kneaded into polychloroprene on a laboplastomill at 80℃, and then the compounds were irradiated by electron beam generated by an accelerator to initiate the crosslinking reaction The results showed that crosslinking density (1/Mc) of the product is linearly proportional to the absorbed dose (D) and the initial PFM content (C0), ie, 1/Mc=(A+KC0)D, where A, K are constant, and the values of K increased almost linearly with PFM's specific unsaturation (moles of double bonds per 100g monomer) The tensile strength of crosslinked ploychloroprene with 4G (Polyethyleneglycol 200 dimethylacrylate) or UA101H (Urethane prepolymer) was found to be the optimum