废弃PET的醇解及其不饱和聚酯树脂的制备与表征  

Alcohosis of PET waste and its application in preparation of unsaturated polyester resin

作　　者：刘华夏[1] 芦璐[1] 高远鹏[1] 刘觉靖 廖正福[1] 陈佳宇[1] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《材料研究与应用》2015年第3期166-171,共6页Materials Research and Application

基　　金：广东省产学研项目(2013B090600011);广东工业大学大学生创新训练计划项目(XJ201411845088)

摘　　要：以回收的废弃PET为基本原料，通过化学解聚、马来酸酯化等步骤制备了一种不饱和聚酯树脂，探讨了醇解工艺条件对不饱和聚酯性能的影响．研究结果表明，在氮气氛条件下，采用1，2-丙二醇作为醇解剂，以醋酸锌为催化剂（用量为PET聚酯的1％（质量分数）），醇解温度190℃，醇解时间3．5h，可得到分子量3000—5000的醇解产物：醇解产物在氮气氛下温度为190—200YC时，与顺丁烯二酸酐反应1．5h，可得到酸值低于30mgKOH／g，综合性能良好的不饱和聚酯树脂，为综合回收利用废弃的PET提供了一条途径．An unsaturated polyester resin was prepared by chemical depolymerization and condensation polyesterification with recycled PET as raw materials and the effects of glycolysis conditions on properties of the unsaturated polyester resin was discussed in this paper. The results showed that the optimal glycolysis is 1,2- propanediol as glycolysis, zinc acetate as a catalyst（in an amount of 1wt.% PET polyester）, glycolysis temperature of 190 ℃ and glycolysis time is 3.5 h under an atmosphere of nitrogen, at which the molecular weight of the glycolysis products distributed from 3000-5000. Meanwhile, an unsaturated polyester resin with acid value below 30 mg KOH/g was obtained by condensation polymerization of the glycolysis products with maleic anhydride at the temperature of 190-200℃ and reaction timel.5h under the atmosphere of nitrogen. The comprehensive properties of the resulted unsaturated polyester resin, such as viscosity, acid value, solid content and stability, can meet the requirements practical application.

关 键 词：聚对苯二甲酸乙二醇酯(PET) 回收 不饱和聚酯树脂 制备 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]