超临界氮气对聚苯乙烯微观形态的影响——喷泉效应与层状结构的形成  

THE EFFECTS OF SUPERCRITICAL FLUID ON MORPHOLOGY OF POLYSTYRENE IN GAS ASSISTED INJECTION MOLDING—FOUNTAIN FLOW EFFECT AND LAMINAR STRUCTURE

作　　者：王东燕[1] 王进[1] 屈小中[1] 梁瑞凤[1] 漆宗能[1] 

机构地区：[1]中国科学院化学研究所

出　　处：《高分子学报》2000年第1期111-113,共3页Acta Polymerica Sinica

摘　　要：The effect of supercritical fluid on morphology of polystyrene in gas assisted injection molding was studied,the SEM result showed that the morphology of polystyrene treated by supercritical fluid nitrogen gas was very different from that of untreated polystyrene.There was a laminar structure in treated polystyrene that induced by fountain flow when the melt was propelled by the gas in gas assisted injection molding.It was also found that gas penetration induced the occurrence of self similar structure,e.g.fractal structure which was related with viscosity finger effects.The effect of supercritical fluid on morphology of polystyrene in gas assisted injection molding was studied,the SEM result showed that the morphology of polystyrene treated by supercritical fluid nitrogen gas was very different from that of untreated polystyrene.There was a laminar structure in treated polystyrene that induced by fountain flow when the melt was propelled by the gas in gas assisted injection molding.It was also found that gas penetration induced the occurrence of self similar structure,e.g.fractal structure which was related with viscosity finger effects.

关 键 词：超临界流体 聚苯乙烯 氮气 微观形态 

分 类 号：O632.13[理学—高分子化学] O631.13[理学—化学]