耐水解PLA/PBS/滑石粉复合材料的制备及性能

Preparation and Properties of Hydrolysis Resistant PLA/PBS/Talc Powder Composites

制备了不同质量分数双(2,6-二异丙基苯)碳化二亚胺(Carbo D)的聚乳酸(PLA)/聚丁二酸丁二醇酯(PBS)/滑石粉复合材料。通过力学性能测试、端羧基滴定测试、傅里叶变换红外光谱分析、差示扫描量热分析以及水解老化测试研究了复合材料的水解稳定性。结果表明:Carbo D的加入可以明显提高PLA/PBS/滑石粉复合材料的耐水解性能,当Carbo D质量分数为1.0%时,复合材料综合性能最好,拉伸强度45.68 MPa,冲击强度5.54 kJ/m^(2),在85℃、85%湿度条件下,经48 h水解老化后复合材料拉伸强度仍达到31.62 MPa,仅下降了30.78%。

Polylactic acid(PLA)/polybutylene succinate(PBS)/talc powder composites with different mass fractions of bis(2,6-diisopropylphenyl)carbodiimide(Carbo D)were prepared.The hydrolytic stability of PLA/PBS/talc powder composites was studied through mechanical properties test,terminal carboxyl titration test,Fourier infrared spectroscopy,differential scanning calorimetry and hydrolytic aging test.The results show that the addition of Carbo D can significantly improve the hydrolysis resistance of PLA/PBS/talc powder composites.When the mass fraction of Carbo D is 1.0%,the composite material has the best comprehensive performance,with a tensile strength of 45.68 MPa and an impact strength of 5.54 kJ/m^(2).At 85℃and 85%humidity conditions,the tensile strength still reached 31.62 MPa after 48 h hydrolysis aging,which only decreased by 30.78%.