金属氧化物对聚氯乙烯热解释放HCl的影响研究  

Effects of Metal Oxides on the Release Characteristic of HCl from the Combustion of PVC

作　　者：何翊[1] 杨守生[2] 

机构地区：[1]中国人民武装警察部队学院科研所,河北廊坊065000 [2]中国人民武装警察部队学院消防工程系,河北廊坊065000

出　　处：《中国塑料》2009年第8期39-42,共4页China Plastics

基　　金：公安部应用创新计划资助项目资助(2007YYCXWJXY112)

摘　　要：利用热重分析仪并采用电导率测定法探讨了几种金属氧化物对聚氯乙烯(PVC)热解时HCl释放过程的影响。结果表明,HCl溶液在0～5.5×10-4mol/L浓度范围内浓度与电导率呈线性关系。ZnO、Fe2O3、CuO、MnO2使PVC的热解起始温度降低,从而使单位质量PVC释放HCl的起始时间缩短,对PVC热解脱HCl有明显的促进作用。而TiO2、MoO3、V2O5却使PVC的热解起始温度升高,起始脱HCl时间延长,对HCl的脱出反应有较强的抑制作用。但加入金属氧化物的PVC体系释放HCl总量并没有超过纯PVC体系。Thermogravimetry and electric conductivity determinations were carried out to study the effects of metal oxides on the release characteristic of HCl from the combustion of PVC. It was found that the electric conductivity was linearly related to the concentration of HCl solution in the range of 00～5.5×10^-4mol/. Zinc oxide （ZnO）, ferric oxide （Fe2Oa）, copper oxide （CuO）, and manganese dioxide （MnO2） decreased the initiative temperature of PVC during thermal degradation, and shortened the initiative time of HCl releasing, and thus accelerated the HCl emission. On the other hand, titanium dioxide （TiO2）, molybdenum trioxide （MoOa）, and vanadium oxide （V2 O5） increased the initiative temperature of PVC during thermal degradation, extended the initiative time of HCl releasing, and thus inhibited the HCl emission. The total volume of HCl released from PVC/metal oxides did not exceed that of neat PVC.

关 键 词：聚氯乙烯 金属氧化物 电导率法 热解 氯化氢 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]