高聚合度聚氯乙烯的热降解特性研究  

STUDY ON THE THERMAL DECOMPOSITION CHARACTERISTICS OF HIGHLY POLYMERIZED POLYVINYL CHLORIDE

作　　者：任强[1] 孙春燕[1] 刘伟[1] 周涵[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2007年第5期23-27,共5页Petroleum Processing and Petrochemicals

摘　　要：利用热重(TG)及热重-傅立叶变换红外光谱联用仪(TG-FTIR)对高聚合度聚氯乙烯(HPVC)的热降解特性进行研究。结果表明,HPVC的热降解分为两个阶段:第一阶段以HCl的脱除为主,表观活化能较高;第二阶段则表现为碳链裂解反应。采用Jin Woo Park法研究HPVC的热降解动力学,计算热降解动力学参数。结果发现,在HPVC热降解的第一阶段,表观活化能随着失重分数的增加先降低后增加,第二阶段的表观活化能随着失重分数的增加而增加。The thermal decomposition performance of highly polymerized polyvinyl chloride （HPVC） was studied by TG and TG-FTIR techniques. The results showed that the thermal decomposition mechanism of HPVC and conventional PVC was basically the same, and two steps were involved： the removal of chlorine in the form of HCl mainly happened in the first step;cracking of carbon chain reactions dominated the second step. The thermal decomposition kinetics of HPVC was studied by Jin Woo Park method and parameters related with the thermal decomposition kinetics were calculated. The results showed that the trend of change in apparent activation energy （AAE） with the weight loss rate was various for these two steps： decrease of AAE followed by increase with weight loss in step 1,and steady increase of AAE in step 2.

关 键 词：聚合度 聚氯乙烯 热降解 动力学 活化能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]