Polyetheretherketone (PEEK) sheets with the thickness of 0.5 mm were prepared by compression molding process using Victrex PEEK-450PF, and then PEEK sheets with different crystallinities were obtained by controlling the cooling rate. The optical characteristics of the samples were respectively measured by laser power meter, UV-VIS-IR spectrophotometer. And with the process parameters of laser power density of 245 W/cm² and moving speed of 5 mm/s, the effect of crystallinity on the laser energy absorption of PEEK and the influence of laser irradiation on the crystallization properties of PEEK sheets were systematically studied. Finally, numerical model of laser energy absorption by PEEK was constructed with COMSOL software. The results show that the reflectivity of PEEK will increase with the increase of crystallinity, while the transmittance decreases. The pure PEEK sheets do not strongly absorb the laser at the wavelength of 1070 nm and the amorphous PEEK is more likely to be ablated. Carbonized samples during the laser irradiation was taken for XRD test and found to be amorphous. After laser irradiation, the crystallinity of the semi-crystalline PEEK material will decrease, but the originally amorphous peek crystallinity will increase slightly. Besides, the numerical simulation results are in good agreement with the experimental results.

使用Victrex PEEK-450PF通过压缩成型工艺制备厚度为0.5 mm的聚醚醚酮（PEEK）片，然后通过控制冷却速率获得具有不同结晶度的PEEK片。样品的光学特性分别通过激光功率计，UV-VIS-IR分光光度计测量。并且工艺参数的激光功率密度为245 W / cm ²以5 mm / s的移动速度，结晶度对PEEK激光能量吸收的影响以及激光辐照对PEEK片材结晶性能的影响进行了系统的研究。最后，利用COMSOL软件建立了PEEK吸收激光能量的数值模型。结果表明，PEEK的反射率将随着​​结晶度的增加而增加，而透射率则下降。纯PEEK片不会强烈吸收1070 nm波长的激光，非晶PEEK更有可能被烧蚀。激光照射过程中碳化的样品用于XRD测试，发现是无定形的。激光照射后，半结晶PEEK材料的结晶度将降低，但最初的无定形聚醚醚酮结晶度将略有增加。除了，