共混型PET光扩散膜的制备和性能研究

Preparation and Prorerties of Mixed Light-Diffusing Film Based on PET

通过共混法在聚对苯二甲酸乙二酯(PET)中添加光扩散剂制备PET光扩散膜。利用Mie散射理论计算了光扩散剂颗粒的折射率和粒径对光扩散效果的影响,并通过实验对理论计算结果进行验证。结果表明,光扩散剂颗粒折射率对光扩散效果的影响较小,而颗粒粒径的影响较大,与理论计算结果相吻合。探讨了光扩散剂添加量对光扩散效果的影响和原因,制备出透光率为85.3%、雾度为90.86%的PET光扩散膜。

PET light-diffusing film was prepared by adding light-diffusing agent into poly（ethylene terephthalate）（PET） matrix via the simple melt blending process.The effects of the particle size refractive index of light-diffusing agent on the light-diffusion performance were investigated through Mie scattering theory calculation,and the theoretical calculation results were verified by experiments.The results indicate that the theory calculation results coincide with the experimental results：particle refractive index afflecting slightly,while particle size afflecting greatly.The effects of light-diffusing agent amount on the transmittance and haze of light-diffusing film were studied and the reason was analyzed.The light-diffusing film with transmittance and haze of 85.3% and 90.86% respectively was prepared.