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北京化工研究院在国内首次通过辐照支化方法研制出了支化型高熔体强度聚丙烯。这种高熔体强度聚丙烯，除了熔体强度提高５０％以上外，其他性能也有所提高。以这种高熔体强度聚丙烯为原料， 通过热成型的方法可制备具有一定浓度的制品，采用挤出和注射方法可制备发泡聚丙烯。?
Beijing Chemical Industry Research Institute for the first time in the country through the irradiation branch developed a branched high melt strength polypropylene. This high melt strength polypropylene, in addition to the melt strength increased by more than 50%, other properties also increased. With such a high melt strength polypropylene as a raw material, a certain concentration of the product can be prepared by the thermoforming method, and the foamed polypropylene can be prepared by the extrusion and injection methods. ?