PET/滑石粉复合材料结晶性能、热性能和力学性能研究

采用差示扫描量热仪、热重分析仪等研究了滑石粉作为成核剂对聚对苯二甲酸乙二醇酯（PET）结晶性能、热性能以及力学性能的影响。结果表明，滑石粉的添加量为0.5 %（质量分数，下同）时，可有效改善PET的结晶性能，结晶温度（Tc）比经历相同热历程的PET空白试样提高11.36 ℃，且结晶完善程度随降温速率的减小而提高；非等温结晶动力学研究发现，Jeziorny法和莫志深法更符合复合材料的非等温结晶过程，而二次结晶的存在使Ozawa法并不适用；由于滑石粉与基体树脂相容性好并可均匀分散，从而很好地保持了原树脂的热性能，且所得复合材料的力学性能均有所提高，其中拉伸性能提高12 %。

Study on Crystallization Behavior,Thermal and Mechanical Properties of PET/Talc Composites

The crystallization, thermal, and mechanical properties of PET/talc composite were studied using differential scanning calorimeter and thermogravimetric analysis. When the loading of talc was 0.5 wt%, the crystallization temperature was increased by 11.36 ℃ based on neat PET. Ozawa, Jeziorny, and Mo methods were used to describe the non-isothermal crystallization kinetics. It was found that Jeziorny and Mo methods could well describe the non-isothermal crystallization, while Ozawa was not suitable. Because of the good dispersion of talc in PET, the thermal property of PET was well maintained, and the tensile property was improved 12 %.