This paper presents the results of polymeric deposit analysis in HP recycling system on two ethylene polymerization trains in tubular reactors when using mixed initiation (organic peroxides and oxygen) in the process ...This paper presents the results of polymeric deposit analysis in HP recycling system on two ethylene polymerization trains in tubular reactors when using mixed initiation (organic peroxides and oxygen) in the process of various grade production. It is demonstrated that polymers belong to the very low density type (with ρ in 0,860 to 0,900 g/cm3 range), due to ultra high branching. Consideration is given to known processes of that kind polymer production. There discussed the alternatives of different approaches to special process features found. It is stated that 80-year high pressure PE synthesis history has been keeping potential for the development.展开更多
1.VLDPE 的特点甚低密度聚乙烯(VLDPE)是一专门术语,用以描述一类可供选择的重要材料——以乙烯为基础的线型共聚物。各供应厂家为制造VLDPE 使用高于常规数量的高级α-烯烃共聚单体(丙烯、丁烯、己烯、辛烯),使 PE 的密度下降到0.915～...1.VLDPE 的特点甚低密度聚乙烯(VLDPE)是一专门术语,用以描述一类可供选择的重要材料——以乙烯为基础的线型共聚物。各供应厂家为制造VLDPE 使用高于常规数量的高级α-烯烃共聚单体(丙烯、丁烯、己烯、辛烯),使 PE 的密度下降到0.915～0.880g/cc 的范围,即低于低密度 PE 定义范围的下限。添加较多的共聚单体可增加乙烯主链上的短链支化密度。展开更多
文摘This paper presents the results of polymeric deposit analysis in HP recycling system on two ethylene polymerization trains in tubular reactors when using mixed initiation (organic peroxides and oxygen) in the process of various grade production. It is demonstrated that polymers belong to the very low density type (with ρ in 0,860 to 0,900 g/cm3 range), due to ultra high branching. Consideration is given to known processes of that kind polymer production. There discussed the alternatives of different approaches to special process features found. It is stated that 80-year high pressure PE synthesis history has been keeping potential for the development.
文摘1.VLDPE 的特点甚低密度聚乙烯(VLDPE)是一专门术语,用以描述一类可供选择的重要材料——以乙烯为基础的线型共聚物。各供应厂家为制造VLDPE 使用高于常规数量的高级α-烯烃共聚单体(丙烯、丁烯、己烯、辛烯),使 PE 的密度下降到0.915～0.880g/cc 的范围,即低于低密度 PE 定义范围的下限。添加较多的共聚单体可增加乙烯主链上的短链支化密度。
