固相法低度氯化聚乙烯的合成与性能研究

在不同的温度下合成了氯含量≤３０％的低度氯化聚乙烯（ＬＣＰＥ），讨论了氯化温度、氯含量对ＬＣＰＥ的结晶度、物理机械性能的影响，同时也研究了ＬＣＰＥ的热氧稳定性能。发现低氯含量的ＬＣＰＥ不如原料ＨＤＰＥ耐氧化，ＬＣＰＥ也容易脱ＨＣｌ和交联，但ＬＣＰＥ的氯含量增加到７．４％时，其脆化时间发生突跃。氯含量＜７．４％的ＬＣＰＥ和ＨＤＰＥ在老化过程中都有一个从易脆化到耐脆化的转变。

Solid Phase Synthesis and Properties of Low Chlorinated Polyethylene

Low chlorinated polyethylene(LCPE)samples with≤30%Cl were synthesized at differenttemperatures. The relationships among chlorination temperature,chlorine content,crystallinity. physical mechanical properties,and stability of LCPE were discussed.LCPE was found to bemore liable to oxidation,dehydrochlorination and cross- linking than HDPE.A significantincrease in the brittleness time of LCPE were observed when the chlorine content of LCPEwas up to 7.4%.It was found thatduring the aging process the brittleness properties ofLCPE with a chlorine content of<7.4%and HDPE underwent significant improvement.