3D打印工艺参数对PLA/PTW共混物力学性能影响的研究

Effect of 3D printing process parameters on mechanical properties of PLA/PTW blends

采用3D打印中的熔融沉积成型(FDM)工艺制备了聚乳酸/乙烯-丙烯酸丁酯-甲基丙烯酸缩水甘油酯共聚物(PLA/PTW),通过单因素实验探究了3D打印工艺参数(喷头温度、打印平台温度和打印速度)对PLA/PTW共混物力学性能的影响,并在此基础上设计了三因素三水平正交实验,优化了3D打印的工艺参数。结果表明,共混物的冲击强度和拉伸强度均随喷头温度的增加呈现先上升后下降、均随打印平台温度的增加而增加、均随打印速度的增加出现下降的趋势。各工艺参数对PLA/PTW共混物综合力学性能的影响从大到小依次为:喷头温度、打印速度、打印平台温度,且当喷头温度为210℃、打印平台温度为80℃以及打印速度为40 mm/s时,打印出的PLA/PTW共混物的综合力学性能最佳。

Poly(lactic acid)(PLA)/ethylene-butyl acrylate-methacrylic acid glycerin ester copolymer(PTW)blends were prepared by 3D print through a fused deposition modeling(FDM)process,and the effect of 3D printing process pa-rameters,including nozzle temperature,printing platform temperature,and printing speed,on the mechanical properties of the PLA/PTW blends were investigated through a single-factor experiment.Based on this experiment,a 3-factor,3-level orthogonal experiment was designed to optimize the 3D-printing process parameters.The results indicated that the impact strength and tensile strength of the blends exhibited an increasing trend at first and then tended to decrease with an increase in the nozzle temperature,and both of them increased with an increase in the printing platform temperature but decreased with an increase in the printing speed.The influence of various process parameters on the comprehensive me-chanical properties of the PLA/PTW blends was in a descending order of nozzle temperature>printing speed>print-ing platform temperature.The printed PLA/PTW product exhibited optimal comprehensive mechanical properties at a nozzle temperature of 210℃,a printing platform temperature of 80℃,and a printing speed of 40 mm/s.