聚碳酸酯微孔泡沫塑料力学性能的研究

Research on Mechanical Properties of Microcellular Polycarbonate Foaming Material

采用超临界微孔发泡技术制备出一系列聚碳酸酯(PC)微孔泡沫塑料,通过扫描电镜、力学性能测试等方法研究了超临界流体温度对发泡剂(CO2)含量的影响,及发泡温度、发泡时间和超临界流体温度对PC微孔泡沫塑料力学性能的影响。结果表明:在测试范围内,随超临界CO2流体温度的升高,CO2含量降低;升高发泡温度或延长发泡时间均使PC微孔泡沫塑料的拉伸强度和冲击强度降低;随超临界CO2流体温度的升高,PC微孔泡沫塑料的拉伸强度增加,冲击强度降低。

A series of microcellular polycarbonate （PC） foaming materials were prepared by supercritical microcellular foaming technology, the effect of supercritical fluid temperature on the content of foaming agent （CO2） and the effect of foaming temperature, foaming time and supercritical fluid temperature on mechanical properties of microcellular PC foaming materials were investigated respectively by means of SEM and test of mechanical properties. The results show： in the range of measurement, the content of CO2 decreases with the increase of supercritical fluid temperature; both the tensile strength and impact strength of microcellular PC foaming material decrease with the increase of foaming temperature or foaming time; with the increase of supercritical fluid temperature, the tensile strength of microcellular PC foaming material increases, but the impact strength of it decreases.