Experimental Study and Numerical Simulation for Effect of Carbon Black on Laser Energy Absorption of PEEK

doi:10.19491/j.issn.1001-9278.2020.10.008

Abstract

Abstract:

Polyetheretherketone （PEEK）/carbon black （CB） blending sheets with an thickness of 0.5 mm were prepared by a compression molding process using Victrex PEEK-450PF as a raw material， and their optical characteristics were characterized by a laser power meter and UV-Vis-IR spectrophotometer. The effect of CB content on the laser energy deposition efficiency of blending sheets was investigated under the process condition of a laser power density of 35 W/cm² and a moving speed of 5 mm/s. A numerical model was established for the laser energy absorption of PEEK by using the COMSOL software. The results indicated that pure PEEK sheet did not strongly absorb the laser at a wavelength of 1070 nm. However， the addition of CB could significantly reduce the reflection and transmission of PEEK to the laser and enhance the photo?thermal conversion efficiency of blending sheets. There was little effect on the tensile strength of blending sheets. In addition， the numerical simulation results were found to be in good agreement with the experimental ones.

Key words: polyetheretherketone, carbon black, laser, numerical simulation

CLC Number:

TQ 324.8

TIAN Renjie, ZHU Guangming, LYU Yuwei, WU Taotao, REN Tianning, MA Zhiliang, ZHANG Shuang. Experimental Study and Numerical Simulation for Effect of Carbon Black on Laser Energy Absorption of PEEK[J]. China Plastics, 2020, 34(10): 44-50.

Figures/Tables 13

Fig.1. Schematic diagram of preparation method and test method for the PEEK sample

Fig.2. Schematic diagram of laser energy distribution

密度/g·cm^-3	比热容/kJ·kg^-1·K^-1	热导率/W·m^-1·K^-1
1.3	2.0	0.25

Tab. 1. Physical properties of PEEK

Fig.3. Meshing of geometric models

Fig.4. Effect of carbon black filler on the absorbance and reflectance of PEEK

Fig.5. Determination of PEEK transmittance with different contents of carbon black

Fig.6. Ablation of PEEK during laser irradiation

Fig.7. Heating curves of PEEK with different carbon black content during laser irradiation

Fig.8. Tensile strength of PEEK with different carbon black content

Fig.9. SEM pictures of PEEK with different carbon black content

CB含量/%	反射率/%	透射率/%	吸收系数/mm^-1
0	41.2	55.6	0.112
0.01	20.0	36.6	1.564
0.03	12.5	19.3	3.023
0.05	7.1	11.4	4.196
0.1	7.0	5.0	5.844

Tab. 2. Absorption coefficient of PEEK with different content of carbon black

Fig.10. Heating curves of PEEK with different carbon black content during laser irradiation

Fig.11. Temperature clouds of numerical simulation of PEEK sheets with different carbon black content

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