A Single-phase of Supercritical CO_2/Polystyrene Solution in Foam Extrusion  

作　　者：吴晓丹 

机构地区：[1]College of Mechanical and Electronic Engineering,Guangdong Polytechnic Normal University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第6期804-808,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China( No.19632004,No.10172074);the Research Foundation for the Doctor-al Program of Higher Education of China(No.98056113);the Natural Science Foundation of Guang-dong Province(No. 980573, No. 0401154)

摘　　要：The high quality single-phase solution of CO2/ Polystyrene was achieved,by analyzing the influential factors for polymer microcellular foaming extrusion.The curve of pressure distribution along the barrel was determined.The axial position of gas-injecting port on the barrel was chosen form the results of stable foaming,and the number of gas-injecting ports in the circumference of the barrel was determined from the CO2 solubility in polymer.The effect of the screw rotation speed on CO2 solubility was studied,and the effects of pressure difference between the gas and the polymer melt on gas-injecting process and on the foaming stability were investigated.The influence of the gas temperature before injection on the single-phase of CO2/Polystyrene solution also was studied.The high quality single-phase solution of CO2/ Polystyrene was achieved,by analyzing the influential factors for polymer microcellular foaming extrusion.The curve of pressure distribution along the barrel was determined.The axial position of gas-injecting port on the barrel was chosen form the results of stable foaming,and the number of gas-injecting ports in the circumference of the barrel was determined from the CO2 solubility in polymer.The effect of the screw rotation speed on CO2 solubility was studied,and the effects of pressure difference between the gas and the polymer melt on gas-injecting process and on the foaming stability were investigated.The influence of the gas temperature before injection on the single-phase of CO2/Polystyrene solution also was studied.

关 键 词：POLYMER extrusion foaming SOLUBILITY single-phase solution 

分 类 号：O632.1[理学—高分子化学]