基于化学再生DMT的PETG合成及性能研究  

Synthesis and Properties Study of PETG Based on Chemical Regenerating DMT

作　　者：孟继承 MENG Jicheng(Key Laboratory of Clean Dyeing and Finishing Technology of Zhejiang Province,Shaoxing University,Shaoxing 312000,China)

机构地区：[1]绍兴文理学院浙江省清洁染整技术研究重点实验室,浙江绍兴312000

出　　处：《塑料科技》2025年第3期50-53,共4页Plastics Science and Technology

基　　金：2022年浙江省“尖兵”“领雁”研发攻关计划(2022C01197)。

摘　　要：为了实现绿色生产,以化学法再生对苯二甲酸二甲酯(DMT)、乙二醇(MEG)及1,4-环己烷二甲醇(CHDM)为原料,合成聚对苯二甲酸乙二醇-1,4-环己烷二甲醇酯(PETG)。结果表明:在n(CHDM+MEG)∶n(DMT)为2.2∶1、酯交换反应温度为205℃、缩合聚合反应温度为275℃的条件下可以合成得到PETG,该共聚物特性黏度为0.7489 dL/g,熔融温度为182.10℃。通过分析共聚酯的化学结构及热性能,测试熔融注塑后样品的拉伸力学性能,并与工业生产装置产品的性能进行对比,发现主要官能团组成一致,但热稳定性能和力学性能有所下降。In order to realize green production,poly 1,4-cyclohexyledimethylene terephthalate(PETG)was synthesized through chemical regenerating dimethyl terephthalate(DMT),mono ethylene(MEG)and 1,4-cyclohexyledimethanol(CHDM).The results showed that PETG can be synthesized under the conditions of n(CHDM+MEG):n(DMT)of 2.2:1,transesterification temperature of 205℃and polycondensation reaction temperature 275℃.The intrinsic viscosity of the co-polyester was 0.7489 dL/g,the melting temperature was 182.10℃.Through analysing the chemical structure and thermodynamic performance for co-polyester,testing the mechanical tensile properties for melted injection moulding samples,and comparing with the product from industrial plant,it was found that the composition of the main functional groups was consistent,but the thermal stability and mechanical properties were reduced.

关 键 词：化学再生对苯二甲酸二甲酯 1 4-环己烷二甲醇 共缩聚反应 

分 类 号：TQ322.2[化学工程—合成树脂塑料工业]