高密度聚乙烯(HDPE)具有线型结构,能加工从渔网至大型铸件等高强度的塑料制品。近年来产量增长很快,1976年美国高密度聚乙烯的产量达186500吨,世界产量达500万吨左右,成为聚烯烃热塑性塑料三大品种之一。目前高密度聚乙烯有多种催化体系。如齐格勒(Ziegler)类型(烷基铝,卤化 High-density polyethylene (HDPE) has a linear structure that can process high-strength plastic products such as fishing nets to large castings. In recent years, the output has grown rapidly. In 1976, the production of high-density polyethylene in the United States reached 186,500 tons and the world’s output reached 5 million tons, making it one of the three major varieties of polyolefin thermoplastics. At present, there are many kinds of high density polyethylene catalyst system. Such as the Ziegler type (aluminum alkyls, halogenated