Sc-CO_2辅助聚合物挤出中螺杆结构对熔体压力的影响  

Effect of Screw Configuration on Polymer Melt Pressure during the Supercritical CO_2-Assisted Extrusion

作　　者：赵杨[1] 黄汉雄[1] 

机构地区：[1]华南理工大学塑料橡胶装备及智能化研究中心,广东广州510640

出　　处：《塑料科技》2008年第11期32-36,共5页Plastics Science and Technology

摘　　要：采用Polyflow软件对双螺杆挤出机内不同螺杆元件所形成流道中的熔体流动进行了模拟,分析了不同螺杆元件的建压能力。结合超临界二氧化碳(Sc-CO2)辅助挤出的螺杆组合原则,对不同螺杆元件组合的螺杆结构进行了挤出实验;并通过对熔体压力的模拟值与实际测量值的比较,分析了不同螺杆结构对熔体压力的影响;另外还针对不同材料的挤出加工确定了相应的螺杆结构。The flow of polymer melt in various channels of screw elements was simulated by using of the Polyflow software to analyze the pressure generation under various screw elements. The screw configuration for polymer extrusion assisted by supercritical C02 must be arranged to keep C02 in supercritical state. The simulated pressures were corn pared with those measured ones in the experiments. The selection of screw configurations for the processing of different materials was investigated according to the effects of different screw configuration on the melt pressure.

关 键 词：超临界二氧化碳 螺杆结构 熔体压力 

分 类 号：TQ315[化学工程—高聚物工业]