氯化原位接枝反应制备羟基官能化CPE力学性能研究

采用气-固相氯化原位接枝来实现对聚乙烯粉末的改性，将氯化和接枝过程合为一体，大大简化了接枝共聚物的合成过程，为含氯聚合物的改性提供了一个新的手段。以高密度聚乙烯（HDPE）为原料．采用氯化原位接枝法合成了以氯化聚乙烯（CPE）为骨架聚合物，丙烯酸-2-羟基乙酯（HEA）为支链的接枝聚合物，反应中不需要加入任何引发剂。探讨了影响接枝聚合物力学性能的因素及变化规律。实验结果表明接枝聚合物的力学性能较CPE有显著的提高。氯化接枝温度、聚合物氯含量以及HEA单体的加入量对CPE—g—HEA的力学性能有很大的影响。

Study on the mechanical properties of hydroxyl functionalization CPE via in-situ chlorinating graft copolymerization

The gas-solid in-situ chlorinating graft copolymerization of PE powder was realized in this thesis.The chlorinating course and grafting course could be collaborated into one process,which simplified the synthesis course of chlorinated grafted polymer.On the other hand,a new method for the modified of polymer with chlorine was offered.A grafting copolymer(CPE-g-HEA),composed of Poly(2-hydroxy ethyl acrylate) (PHEA) as branched chains and chlorinated polyethylene(CPE) as backbone,was synthesized by in-situ chlorinating graft copolymerization based on HDPE.No initiator was added into the system.The influential factors of mechanical properties was discussed.The tensile testing results showed that in-situ chlorinating graft copolymer mixtures had good mechanical properties,which were influenced greatly by temperature,the chlorine contents of CPE-g-HEA and the additional amount of HEA.