光氧老化对PET结构和热稳定性的影响  

Effect of Photooxidation Aging on Structure and Thermal Stability of PET

作　　者：陈强[1] 祁小宁 张攀岗 白文斌 赵永仙[1] Chen Qiang;Qi Xiaoning;Zhang Pangang;Bai Wenbin;Zhao Yongxian(Key Laboratory of Rubber Plastics Materials and Engineering Ministry of Education,Shandong Provincial Key Laboratory of Rubber Plastics Materials and Engineering, Qingdao University of Science and Technology, Qingdao,Shandong,266042)

机构地区：[1]青岛科技大学,橡塑材料与工程教育部重点实验室,山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《现代塑料加工应用》2021年第5期1-4,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金项目(51373084);山东省重点研发计划(公益类)立项项目(2019GGX102068)。

摘　　要：通过人工加速光氧老化试验研究了聚对苯二甲酸乙二醇酯(PET)光氧老化后结构与热稳定性的变化。结果表明:PET在光氧老化过程中端羧基含量增加,顺式构象降低,反式构象增加。随着光氧老化时间增加,PET的色差和黄色指数均增加,透明度下降,熔融温度和结晶峰温度总体升高,热稳定性呈现先升后降的趋势。The changes of structure and thermal stability of polyethylene terephthalate(PET)after photooxidative aging were studied by artificial accelerated photooxidative aging test.The results show that the content of terminal carboxyl groups increases,and the cis conformation decreases,and the trans conformation increases during the photooxidation aging process of PET.As the photooxidation aging time increases,the color difference and yellow index of PET increase,and the transparency decreases,and the melting temperature and crystallization peak temperature generally increase,and the thermal stability shows the trend of first increasing and then decreasing.

关 键 词：聚对苯二甲酸乙二醇酯 光氧老化 构象 结晶 热稳定性 

分 类 号：TQ3[化学工程]