北京化工研究院目前在国内首次通过辐射支化方法研制出了支化型高熔体强度聚丙烯 ,该产品熔体强度提高了5 0 %以上 ,其他性能也有所提高。以这种高熔体强度聚丙烯为原料 ,采用挤出和注射方法可制备发泡聚丙烯。另外该院在国内首次采用辐照交联的方法 ,在较低的吸收剂量下 ,研制 Beijing Institute of Chemical Industry is currently the first time in the country by radiant branching method developed branched high melt strength polypropylene, the product melt strength increased by more than 50%, and other properties have also been increased. Using such high melt strength polypropylene as raw material, foamed polypropylene can be prepared by extrusion and injection methods. In addition, the hospital in the country for the first time using radiation cross-linking method, at a lower absorption dose, development