间歇式超临界流体微孔发泡的成核机理研究  

STUDY ON MECHANICS OF NUCLEATION OF BITCH-TYPE SUPERCRITICAL MICROCELLULAR FOAMING

作　　者：刘涛[1] 罗世凯[1] 余雪江[1] 王宪忠[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,绵阳621900

出　　处：《工程塑料应用》2010年第4期5-8,共4页Engineering Plastics Application

摘　　要：采用间歇式超临界流体微孔发泡技术制备出一系列的聚碳酸酯(PC)微孔泡沫塑料,通过扫描电子显微镜研究了间歇式超临界流体微孔发泡的成核机理。结果表明,间歇式超临界流体微孔发泡其泡核的成核位置是由外部开始,逐渐向内部扩散,最终形成了微孔泡沫塑料,这与传统发泡其泡核初始位置存在明显的不同。同时,在间歇式超临界流体微孔发泡过程中,PC微孔泡沫塑料的结构由初期的多层结构转变为最终的层芯结构。A series of microcellular polycarbonate foams were prepared by bitch-type supercritical microcellular foaming technology.By means of SEM,mechanics of nucleation of bitch-type supercritical microcellular polycarbonate foaming was studied.The results showed that in the process of bitch-type supercritical microcellular foaming,the initial point of nucleation was from the outside in,which was different from the traditional foaming.At the same time,the structure of microcellular polycarbonate foam changed from multi-layer to layer-core.

关 键 词：超临界流体 聚碳酸酯 微孔 泡沫塑料 成核 结构 

分 类 号：TQ328[化学工程—合成树脂塑料工业]