环己二醇二缩水甘油醚与Ca/Zn复合稳定剂协同作用及机理研究  

Study on Synergistic Effect and Mechanism of Cylohexanediol Diglycidyl Ether and Ca/Zn Composite Stabilizer

作　　者：蒋金博[1] 邓剑如[1] 申红光[1] 蒋卫和 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082 [2]岳阳昌德化工有限公司,湖南岳阳414003

出　　处：《中国塑料》2006年第8期79-83,共5页China Plastics

摘　　要：采用环己二醇二缩水甘油醚作为辅助热稳定剂,与Ca/Zn稳定剂复配,通过刚果红热稳定测试,研究了它们相互间协同作用及机理。结果表明,环己二醇二缩水甘油醚与Ca/Zn复合稳定剂有很好的协同作用,能有效地抑制Ca/Zn复合稳定剂在使用中的“锌烧”现象；其中Ca：Zn为3：1时热稳定性最好,热稳定时间为38min；对于不同的Ca、Zn比,加入环己二醇二缩水甘油醚的配方的性能均优于环氧大豆油配方的。通过实验及傅里叶红外光谱、紫外光谱分析表明,己二醇二缩水甘油醚在PVC降解产生的HCl的作用下,其分子内环氧基团开环和醚键断裂,与PVC降解产生的HCl反应,能消除PVC降解产生的HCl；同时,环己二醇二缩水甘油醚能与硬脂酸锌在PVC降解中产生的ZnCl_2发生作用,其分子内环氧基团开环,氧与Zn结合,使得ZnCl_2催化PVC降解活性降低。The synergistic mechanism between cylohexanediol diglycidyl ether with Ca/Zn composite stabilizer was studied through Congo thermal stabilization test. The former restrained the ＂zinc burn＂ effectively when Ca/Zn system was used. When the weight ratio of cylohexanediol diglycidyl ether to Ca/Zn was 3： 1, a thermal stabilization time of 38 min could be achieved, which was better than the system based on epoxidized soybean oil. Two reactions were considered as the origin of synergistic effect： one was the opening of epoxidized groups to trap HCl released during the degradation of PVC; the second was the oxide atom in the epoxidized group combined with zinc to inactivate the catalysis of ZnCl2.

关 键 词：环己二醇二缩水甘油醚 复合稳定剂 聚氯乙烯 协同作用 协同机理 

分 类 号：O621.25[理学—有机化学]