摘要
研究了硫酸铵和氧化钴对聚氯乙烯(PVC)热降解和热氧化降解过程的影响。氧化钴基本消除了PVC热降解时自诱导脱氯化氢反应特征,氧化性地加速了热降解过程进行。硫酸铵轻微加速了初始热降解反应,由于生成氯化铵而消除了氯化氢释放,实质性改变了PVC氯化氢释放规律,并推迟了PVC主体热降解的进行。
Thermal degradation of poly(vinyl chloride) in the presence of the additive cobaltous oxide (CoO) or ammonium sulfate ((NH_4)_2SO_4) was studied with isothermal treatment, electric conductance measurement, thermogravimetry and differential scanning calorimetry. The results show that CoO modifies elimination of hydrogen chloride (HCl) by removing auto-acceleration, and offers an extra heat of degradation, and increases the maximum rate of mass loss. Whereas (NH_4)_2SO_4 catalytically produces HCl at the initial thermal degradation, and retards scission of main chain. This is substantially different from that of virgin PVC, which is due to formation of ammonium chloride.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第1期149-152,共4页
Polymer Materials Science & Engineering
基金
教育部留学回国人员启动基金资助
关键词
聚氯乙烯
热降解
电导率
硫酸铵
氧化钴
poly(vinyl chloride)
thermal degradation
electric conductivity
ammonium sulfate
cobaltous oxide
