摘要
采用热重法对聚氯乙烯 (PVC)的燃烧过程进行了研究 ,探讨了聚氯乙烯燃烧特性 ,并由它们的微分热重曲线计算出它们的反应动力学参数及对影响反应常数的因素进行了研究。同时 ,考察了恒速升温和快速升温过程HCl的生成特性。结果表明 ,PVC的燃烧机理是由三个过程决定的 ,可用三个一级反应表示。PVC的燃烧过程的第一阶段为脱氯阶段。第二阶段的活化能和指前因子明显低于第一和第三阶段。此阶段为挥发分释放阶段。升温速率的增加导致反应开始温度。
The combustion characteristics of polyvinyl chloride (PVC) are investigated by means of thermogravimetry The combustion activation energy and frequency factor are obtained by Doyle method It was observed that PVC weight was reduced in three stages with exothermic reaction in its combustion The first stage was caused by the chlorine removed from PVC The volatile matter emission from PVC led to the second weight loss stage of PVC The mechanism of PVC combustion can be expressed by three first-order kinetic equations The beginning temperature of reaction, the max reaction rate and the temperature of HCl emission were increased with increasing heating rate
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2000年第1期67-70,共4页
Journal of Fuel Chemistry and Technology
基金
广东省重点基金
中科院特别支持项目!(KY95T - 0 3 - 0 3 )
关键词
热重法
燃烧特性
聚氯乙烯
氯化氢
PVC, thermogravimetry, combustion characteristics
