裂解色谱法研究ACR加工助剂对聚氯乙烯热稳定性和相容性的影响

Study on the Effeos of ACR on the Heat Stability and (ntermiscibility of PVC by Pyrolysis Gas Chromatography(PGC)

裂解色谱法具有快速灵敏、表征性强等特点,对高分子材料中少量组分的检查以及分子链结构中细微变化都可直接反映出来。ACR加工助剂一般使用量小于5％,不管二元还是四元共聚体,其主组分是甲基丙烯酸甲酯(MMA),裂解时主要碎片是MMA。聚氯乙烯(PVC)裂解时,由于消除作用,脱去HCl,环化成苯的特征碎片。在相同条件下。

The effects of the natute and amounts of ACR used on the heat stability and intermiscibility of PVC have been studied by PGC method. Seven ACR have been evaluated for PVC heat stability, and the optimum ratio has been selected. The composite distribution as well as the intermiscibihty of ACR and PVC, was also investigated.