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

doi:10.19491/j.issn.1001-9278.2024.02.011

Abstract

Abstract:

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 parameters， 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 mechanical properties of the PLA/PTW blends was in a descending order of nozzle temperature > printing speed > printing 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.

Key words: 3D printing, poly（lactic acid）/ethylene?butyl acrylate?methacrylic acid glycerin ester copolymer, mechanical property

CLC Number:

TQ321

MA Xiuqing, LAO Zhichao, LI Mingqian, HAN Shuntao, HU Nan. Effect of 3D printing process parameters on mechanical properties of PLA/PTW blends[J]. China Plastics, 2024, 38(2): 70-75.

Figures/Tables 13

Fig.1. Schematic diagram of the screw configurations

区域	T₁	T₂	T₃	T₄	T₅	T₆	T₇
加工温度/ $℃$	150	160	170	180	180	170	155

区域	T₁	T₂	T₃	T₄	T₅	T₆	T₇
加工温度/ $℃$	150	160	170	180	180	170	155

Tab.1. Each barrel section and head temperature setting values

Fig.2. PLA/PTW modified silk material

Fig.3. Schematic diagram of FDM 3D printing

Fig.4. Sample of 3D printing

Fig.5. Effect of nozzle temperature on mechanical properties of the PLA/PTW

Fig.6. Effect of printing platform temperature on mechanical properties of the PLA/PTW

Fig.7. Effect of printing speed on mechanical properties of the PLA/PTW

水平	因素
水平	喷头温度（A）/ $℃$	打印平台温度（B）/ $℃$	打印速度（C）/mm·s^-1
1	200	60	40
2	210	70	50
3	220	80	60

水平	因素
水平	喷头温度（A）/ $℃$	打印平台温度（B）/ $℃$	打印速度（C）/mm·s^-1
1	200	60	40
2	210	70	50
3	220	80	60

Tab.2. Three⁃factor three⁃level orthogonal experimental protocol

实验编号	实验因素及水平			冲击强度/ kJ·m^-2	拉伸强度/MPa	综合力学性能指数
实验编号	A	B	C	冲击强度/ kJ·m^-2	拉伸强度/MPa	综合力学性能指数
1	1	1	1	29.43	18.24	47.67
2	1	2	2	28.97	18.73	47.70
3	1	3	3	29.07	18.54	47.61
4	2	1	2	28.89	18.97	47.86
5	2	2	3	28.92	18.94	47.86
6	2	3	1	30.23	18.79	49.02
7	3	1	3	27.86	18.66	46.52
8	3	2	1	29.34	18.69	48.03
9	3	3	2	28.26	19.09	47.35

Tab.3. Results of orthogonal experiment

性能指标	A	B	C
K₁	29.16	28.73	29.67
K₂	29.35	29.08	28.71
K₃	28.49	29.19	28.62
R	0.86	0.46	1.05

Tab.4. Average and range of the impact strength

性能指标	A	B	C
K₁	18.50	18.62	18.57
K₂	18.90	18.79	18.93
K₃	18.81	18.81	18.71
R	0.40	0.19	0.36

Tab.5. Average and range of the tensile strength

性能指标	A	B	C
K₁	47.66	47.35	48.24
K₂	48.25	47.86	47.64
K₃	47.30	47.99	47.33
R	0.95	0.64	0.91

Tab.6. Average and range of comprehensive mechanical property index

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