This type of degradation can be decreased by the presence of lead, barium and cadmium salts which act as scavengers for hydrogen chloride and therefore can be used as heat stabilizers.

• 这种类型的降解会由于铅、钡、镉盐的存在而减慢,这些盐可作为氯化氢的捕获剂,因此能被用作热稳定剂。