【摘要】 用HgAc催化溴加成法测定聚氯乙烯 (PVC)中总不饱和双键的含量 ,研究了总不饱和双键的含量与热稳定性的关系 ,测定了优化前、优化中、优化后 6个PVC样品 ,结果发现 ,随着热氧老化时间的增加 ,PVC样品中的总不饱和双键的含量增加 ,优化后的PVC样品比优化前、优化中的样品中总不饱和双键的含量低。更多还原

【Abstract】 In this paper,the total number of double bond in PVC was determined by bromine addition,with mercuric acetate as catalyst.The correlation between the total number of double bond in PVC and the thermal stability of PVC was studied.The total number of double bond was determined for six PVC samples.It was found that the total double bond content increased with increase in thermo-oxidation time.The results show that the total number of double bond of PVC samples after optimization of polymerization conditions was smaller than that of PVC samples during and before optimization.更多还原