抗氧剂1010对3D打印用聚乳酸氧化降解性能的影响

为研究抗氧剂1010(KY1010)对3D打印用聚乳酸(PLA)氧化降解性能的影响,以PLA和KY1010为原料,通过挤出成型工艺制得3D打印用PLA丝材,并采用FDM工艺制备复合材料,研究KY1010添加量对PLA丝材拉伸性能、动态热机械性能、氧化诱导期以及复合材料力学性能的影响.结果表明,KY1010可有效改善PL...

Effect of Antioxidant 1010 on Oxidative Degradation of Poly(lactic acid)for 3D Printing

To understand the effect of antioxidant 1010(KY1010)on the properties of poly(lactic acid)(PLA)wire materials for 3D printing,a modified wire material for 3D printing was prepared by melt blending extrusion,and then a composite material was prepared by FDM process using this modified wire material.The effect of antioxidant addition on the oxidation induction period,tensile properties,dynamic thermal mechanical properties and mechanical properties of PLA wire material was investigated.The results indicated that KY1010 effectively improved the oxidation resistance of PLA.The tensile strength and storage modulus of PLA increased at first and then tended to decrease with an increase in the concentration of KY1010.However,its elongation at break decreased gradually,and the oxidation induction time and oxidation induction temperature increased gradually with an increase in the concentration of KY1010.On the other hand,the tensile strength and elastic modulus of the composites increased at first and then decreased with the concentration of KY1010,but the impact strength and notch impact strength increased gradually.The PLA wire material achieved the optimum comprehensive performance with the addition of 0.5 wt% KY1010.In this case,the oxidation induction time and oxidation induction temperature of the PLA wire material increased by 1655.19% and 16.91%,respectively.Its tensile strength increased by 15.35%,but its elongation at break decreased by 29.43%.Moreover,its storage modulus reached a maximum value.The composite material achieved an increase in tensile strength by 26.04%and in elastic modulus by 33.23%.A comparative experiment indicated that TGA was more suitable to measure the oxidation induction period of PLA than DSC.