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.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2010年第4期5-8,共4页
Engineering Plastics Application
关键词
超临界流体
聚碳酸酯
微孔
泡沫塑料
成核
结构
supercritical
polycarbonate
microcellular
foam plastics
nucleation
structure
