钙锌复合稳定剂对PVDC热稳定性能的影响研究  

Study on Effect of Calcium and Zinc Compound Heat Stabilizer on Thermal Stability of PVDC

作　　者：张华集[1] 沈永鑫[1] 张雯[1] 陈晓[1] 陈鹏[1] 

机构地区：[1]福建师范大学化学与材料学院福建省高分子材料重点实验室,福州350007

出　　处：《塑料助剂》2011年第5期34-38,共5页Plastics Additives

基　　金：福建省科技厅项目(2009H0017)

摘　　要：以钙锌复合稳定剂(Ca-Zn)为稳定剂,对聚偏氯乙烯(PVDC)热稳定体系进行研究,采用刚果红法和热失重法测试了Ca-Zn含量对PVDC热分解脱氯化氢变色温度、变色时间以及热失重的影响。结果表明:纯PVDC受热后易分解,含4质量份Ca-Zn的PVDC,其刚果红试纸初始变色温度和完全变色温度与纯PVDC相比分别提高了18℃和24℃,试纸初始变色时间和完全变色时间分别延长了199s和804s,恒温热失重质量损失率降低了36.2%,等速升温热失重初始分解温度和最大速率峰对应温度分别提高了58.5℃和60℃,热分解温度和热稳定性大幅度提高。Taking calcium and zinc compound stabilizer （Ca-Zn） as heat stabilizer, the thermal stability systems of polyvinylidene chloride （PVDC） were studied. The influences of the Ca-Zn on the change color temperature and time of Congo red as well as the heat degradation of PVDC were investigated by Congo red method and thermogravimetry analysis （TGA）. The results showed that the pure PVDC decomposes easily after heating. Compared with the pure PVDC, the initial and complete Congo red change color temperature of the PVDC with the addition of 4 phr Ca-Zn increases 18 ℃ and 24 ℃, and the initial and complete Congo red change color time extends 199 s and 804 s. The TGA mass loss rate of the PVDC with the addition of 4 phr Ca-Zn decreases 36.2% at the constant temperature, and the temperature of the initial decomposition and the maximum rate of peak increases 58.5℃ and 60 ℃ at the constant temperature elevation. The thermal decomposition temperature and thermal stability of the PVDC improves greatly.

关 键 词：钙锌复合稳定剂 聚偏氯乙烯 热稳定性 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]