改性纳米CaCO_(3)/PLA复合材料的制备及性能

Preparation and Properties of Modified Nano CaCO_(3)/PLA Composites

采用铝酸酯偶联剂对纳米碳酸钙(CaCO_(3))进行表面改性,与聚乳酸(PLA)熔融共混制备改性纳米CaCO_(3)/PLA复合材料。结果表明:改性纳米CaCO_(3)的加入,使改性纳米CaCO_(3)/PLA复合材料的拉伸性能、冲击强度呈现先上升后下降的趋势,硬度则一直呈上升趋势,熔体流动速率呈下降趋势。添加10~15质量份改性纳米CaCO_(3)时,改性纳米CaCO_(3)/PLA复合材料的拉伸性能、冲击强度、维卡软化温度等综合性能最佳,超过PLA的性能,且可以降低成本,给实际生产带来一定的参考价值。

Aluminate coupling agent was used to modify the surface of nano calcium carbonate(CaCO_(3))and melt blend with polylactic acid(PLA)to prepare nano CaCO_(3)/PLA composites.The results show that the addition of modified nano CaCO_(3)leads to a trend of first increasing and then decreasing in tensile properties and impact strength of the modified nano CaCO_(3)/PLA composites,while hardness continues to increase and the melt flow rate decreases.When adding 10~15 phr modified nano CaCO_(3),the modified nano CaCO_(3)/PLA composites have the best comprehensive properties such as tensile properties,impact strength and Vicat softening temperature,surpassing the performance of PLA,and can reduce costs,which can provide some reference value for actual production.