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.
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