摘要
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PLA的抗氧化性,随KY1010添加量的增加,PLA丝材拉伸强度和储能模量先增加后减少,氧化诱导时间和氧化诱导温度逐渐增加;复合材料拉伸强度和弹性模量先增加后减少,冲击强度和缺口冲击强度逐渐提高;当KY1010添加量为0.5%(质量分数,下同)时,PLA丝材的综合性能最好,PLA丝材的氧化诱导时间和氧化诱导温度分别提高了1655.19%和16.91%,拉伸强度提高了15.35%,储能模量最佳;复合材料的拉伸强度和弹性模量分别提高了26.04%和33.23%。
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.
作者
谭玉林
王翠翠
李明鹏
王戈
程海涛
TAN Yulin;WANG Cuicui;LI Mingpeng;WANG Ge;CHENG Haitao(International Center for Bamboo and Rattan,Beijing 100102,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2021年第1期84-90,共7页
China Plastics
基金
国际竹藤中心基本科研业务费专项资金项目资助(1632018015)。
关键词
聚乳酸
抗氧化剂
三维打印
氧化诱导期
力学性能
poly(lactic acid)
antioxidant
three-dimensional printing
oxidation induction time
mechanical property
