采用固相法对高密度聚乙烯（HDPE）进行氯化,得到分子链上具有特殊氯分布的特种氯化聚乙烯（CPE）（SCPE）,其可以作为增韧剂对聚氯乙烯（PVC）增韧。结果表明,在SCPE含量为5份时,PVC/SCPE共混物的拉伸强度相对于PVC没有降低,反而提高了4%左右;缺口冲击强度提高了62.5%（13 kJ/m2）。差示扫描量热（DSC）和核磁共振（1H-NMR）的结果表明,SCPE分子链上特殊的氯嵌段结构对材料的性能至关重要。材料断面扫描电镜（SEM）分析表明PVC相与SCPE相的充分融合是力学性能优异的原因之一。
The special chlorinated polyethylene was synthesized from high density polyethylene（HDPE） through solid phase method,in which a new kind chlorinated polyethylene（CPE） with special chlorine distribution was obtained by controlling temperature and time of the chlorinating reaction.The special chlorinated polyethylene（SCPE） can be used as a new modifier to toughen poly（vinyl chloride）（PVC）.In this article,the mechanical property and microcosmic structure of SCPE and the blended system were studied.The results show that tensile strength of the blends increases 4% and notch impact strength of the blends increases 62.5% contrast to pure PVC.Results of DSC and 1H-NMR indicate that chain segments of different chlorine content exist in molecular chains of SCPE.The toughness of PVC can be modified by SCPE blended onto PVC while tensile strength of blends is improved.The analysis of morphological structure shows that the sufficient amalgamation between PVC phase and SCPE phase is excellent to improve mechanical property of the blends.
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