用超临界CO_2制备微孔聚苯乙烯/热致液晶聚合物原位复合材料  

PREPARATION AND CHARACTERIZATION OF MICROCELLULAR POLYSTYRENE/LCP in situ COMPOSITES BY USING SUPERCRITICAL CO_2

作　　者：王进[1] 程兴国[1] 袁明君[1] 何嘉松[1] 

机构地区：[1]中国科学院化学研究所分子科学中心工程塑料国家重点实验室,北京100080

出　　处：《高分子学报》2001年第4期541-544,共4页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 5 9873 0 2 6)

摘　　要：Microcellular polystyrene/LCP in situ composites with cell diameter less than 4 μm are prepared by using pressure quenching after supercritical CO 2 saturating at 25?MPa, 80℃ for 6 h. Characterization of the microcellular structure of these blends is conducted to reveal the influence of LCP addition, LCP ratio and compatibilizer on the microcellular blends. The typical structure of these microcellular PS/LCP blends is that the microvoids only exist in the polystyrene phase. This structure results from the poor adsorption of supercritical CO 2 by LCP under the experimental conditions. The cell diameter of the microcellular blends is smaller than that of microcellular PS. An increase of cell size is also found from skin to core in microcellular blends. The microcellular blends with ZnSPS has larger cell size than those without ZnSPS, which is the consequence of the improvement of interfacial adhesion. It is because CO 2 could easily diffuse out through the gap between poor adhesion interface of blends without ZnSPS.Microcellular polystyrene/LCP in situ composites with cell diameter less than 4 mum are prepared by using pressure quenching after supercritical CO2 saturating at 25 MPa, 80 degreesC for 6 h. Characterization of the microcellular structure of these blends is conducted to reveal the influence of LCP addition, LCP ratio and compatibilizer on the microcellular blends. The typical structure of these microcellular PS/LCP blends is that the microvoids only exist in the polystyrene phase. This structure results from the poor adsorption of supercritical CO2 by LCP under the experimental conditions. The cell diameter of the microcellular blends is smaller than that of microcellular PS. An increase of cell size is also found from skin to core in microcellular blends. The microcellular blends with ZnSPS has larger cell size than those without ZnSPS, which is the consequence of the improvement of interfacial adhesion. It is because CO2 could easily diffuse, out through the gap between poor adhesion interface of blends without ZnSps.

关 键 词：微孔聚合物 原位复合材料 磺化聚苯乙烯 热致液晶聚合物 超临界三氧化碳 

分 类 号：TB332[一般工业技术—材料科学与工程]