模压法制备微孔发泡聚碳酸酯片材  

Preparation of microcellular polycarbonate foam by compression molding

作　　者：向帮龙[1] 管蓉[1] 方荃[1] 蒋亚静[1] 肖兆新[1] 

机构地区：[1]湖北大学化学与材料科学学院,湖北武汉430062

出　　处：《材料科学与工艺》2007年第2期233-236,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50473026)

摘　　要：为制备采用微孔挤出法、微孔注射法及常规发泡方法难以制备的薄型微孔发泡聚碳酸酯(PC)片材,首次采用具有制备周期短、工艺简单、操作容易、制备价格低廉等优点的模压法,通过快速降温降压制备了薄型微孔发泡PC片材,并探讨了加工参数对泡孔结构的影响,利用显微镜对泡孔结构进行了表征.实验结果表明:随着发泡时间的增加,泡孔尺寸先增加后恒定不变,泡孔密度先增加后降低;随发泡压力的增加,泡孔尺寸快速减小后变化不大,泡孔密度先快速增加后变化较小;随着发泡温度的增加,泡孔尺寸快速增加,泡孔密度快速降低;随活化比的增加,泡孔尺寸先减小后增加,泡孔密度则先增加后降低.通过控制发泡时间、发泡压力、发泡温度、活化比等加工参数可以控制微孔发泡PC的泡孔结构.Thin microcellular PC foam has been prepared by compression molding via temperature and pressure quench, which can＇ t be microcellularly processed by microcellular extrusion, microcellular injection and conventional foaming methods. The compression molding has the advantages of short processing cycle, simple technique, easy to operate and low processing cost. The effect of the processing parameters on the cellular structure has been investigated. The microcellular structure was characterized by optical microscopy. The results show that with the increase of foaming time, the cell size increases and then levels off, the cell density increases and then decreases; with the increase of foaming varies little, the cell density increases exponentially; with pressure, the cell size decreases rapidly and then the increase of foaming temperature, the cell size increases drastically while the cell density decreases sharply; with the increase of active ratio, the cell size decreases and then increases, but the cell density increases and then decreases. By controlling the foaming time, foaming pressure, foaming temperature and active ratio, the cellular structure of microcellular PC foam can be controlled.

关 键 词：模压法 微孔发泡 聚碳酸酯(PC) 制备 

分 类 号：O631[理学—高分子化学]