耐紫外老化透明PET薄膜的光学性能研究  

Study on Optical Properties of Ultraviolet-Resistant Transparent PET Film

作　　者：陈科侠 赖垂林 徐静涛 Chen Kexia;Lai Chuilin;Xu Jingtao(Ningbo Radi-Cool Advanced Energy Technologies Co.,Ltd.,Ningbo,Zhejiang,315500)

机构地区：[1]宁波瑞凌新能源科技有限公司,浙江宁波315500

出　　处：《现代塑料加工应用》2024年第5期41-44,共4页Modern Plastics Processing and Applications

基　　金：宁波市青年科技人才培育项目基金项目(2023QL047)

摘　　要：在加速老化条件下,采用氙灯老化箱、高低温湿热试验箱、分光测色仪、紫外分光光度计研究了耐紫外老化透明聚对苯二甲酸乙二醇酯(PET)薄膜的光学性能。结果表明:紫外线引发的光氧化是该PET薄膜发生光学特性变化的主要原因。在氙灯老化试验中,PET薄膜的黄蓝值差(Δb)基本呈现线性变化,亮度差(ΔL)、色差(ΔE)、可见光透射比在老化49 d内均变化较小,但49 d后均剧烈变化。抗紫外线助剂可在短期内提升PET薄膜的紫外线防护性能,但在长期紫外线照射下,抗紫外线助剂逐渐衰减,导致PET薄膜老化失效。Under accelerated aging conditions, the optical properties of transparent polyethylene terephthalate(PET) films resistant to ultraviolet aging were studied using xenon lamp aging chamber, high and low temperature wet heat test chamber, spectrophotometer, and ultraviolet spectrophotometer. The results show that the photooxidation caused by ultraviolet light is the main reason for the changes in the optical properties of the PET film. In the xenon lamp aging test, the yellow blue value difference(Δb) of PET film shows a linear change, while brightness difference(ΔL), color difference(ΔE) and visible light transmittance all change slightly within 49 days of aging but dramatically after 49 days. Anti ultraviolet additives can improve the ultraviolet protection performance of PET films in the short term, but under long-term ultraviolet irradiation, the additives gradually decay, leading to the aging and failure of PET films.

关 键 词：透明PET薄膜 氙灯老化 颜色变化 光学性能 紫外防护 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业] TB383.2[一般工业技术—材料科学与工程]