硬脂酸盐复合物的形成及对聚氯乙烯的热稳定化作用  

The Formation of Metal Stearate Complex and Its Effect on the Thermal Stability of PVC

作　　者：孙伟[1] 陈光顺[1] 郭少云[1] 

机构地区：[1]高分子材料工程国家重点实验室,四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2008年第10期87-90,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50533080)

摘　　要：通过红外光谱(FT-IR)、广角X射线衍射和DSC等研究了硬脂酸钡(BaSt2)/硬脂酸锌(ZnSt2)复合物的形成。研究表明,在一定温度下熔融共混后,BaSt2和ZnSt2羰基特征吸收峰、晶面间距和熔点均发生了明显的变化,表明BaSt2和ZnSt2在此条件下形成了复合物。与BaSt2/ZnSt2混合物相比,BaSt2-ZnSt2复合物能改善聚氯乙烯(PVC)的初期色泽稳定性和静态热稳定性。BaSt2-ZnSt2复合物能够阻止ZnCl2的形成,从而抑制ZnCl2对PVC的催化降解作用。The formation of complex between BaSt2 and ZnSt2 was studied by FT-IR, X-ray diffraction and DSC. The result shows that the RCOO- absorption, melting point and d-spacing of complex are changed obviously and metal stearate can form complex after heated at 180 ℃. The BaSt2- ZnSt2 complex can improve the color in the early stage and increase the static thermal stability time of PVC. The BaSt2-ZnSt2 complex also can hold up the formation of ZnCl2 which can catalyse the degradation of PVC.

关 键 词：聚氯乙烯 硬脂酸钡 硬脂酸锌 热稳定剂 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]