将过氧化二异丙苯(DCP)添加到碱式碳酸镁阻燃高密度聚乙烯/三元乙丙橡胶(PE-HD/EPDM)体系中，采用动态硫化法制备了阻燃PE-HD/EPDM材料。利用热重-差示扫描量热法分析了阻燃PE-HD/EPDM的热稳定性，扫描电子显微镜观察了阻燃PE-HD/EPDM的微观形貌，研究了DCP含量对阻燃PE-HD/EPDM性能的影响。结果表明，DCP的质量分数为1.0%时，阻燃PE-HD/EPDM材料的拉伸强度为9.7 MPa，断裂伸长率为1.2%，缺口冲击强度为39.5 kJ/m2，极限氧指数为30.8%；加入DCP后，PE-HD/EPDM材料的吸热峰有所滞后、燃烧炭层更为致密。%The DCP was used to add into flame retardant high density polyethylene(PE-HD)/EPDM system with basic magnesium carbonate. The flame retardant system was prepared by dynamic vulcanization. The thermal stability of the system was studied by TG/DSC,the microstructure was studied by SEM and the influence of the DCP content on the properties of the systems was studied. The results show that when the mass fraction of DCP was 1.0%,the tensile strength,elongation at break,notched impact strength and limited oxygen index is 9.7 MPa,1.2%,39.5 kJ/m2 and 30.8%, respectively. When the DCP is added,the endothermic peak of PE-HD/EPDM system lagged behind and the carbon layer of combustion is denser.
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