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①分子鏈(lian)結構含有(you)引(yin)發(fa)劑(ji)殘基(ji)含有(you)烯丙(bing)基(ji)氯起(qi)到活化基(ji)團的(de)作用，端基(ji)雙(shuang)鍵使熱(re)穩定性下降；
②氧的影響，加(jia)速了(le)PVC的熱降解時脫HCL；
③反應(ying)產生的(de)HCl對PVC的降解有催(cui)化作用(yong)；
④增(zeng)塑劑的用量的影響。
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