再生聚酯微醇解解聚技术研究Study on Micro Glycolysis Depolymerization Technology of Regenerated Polyester
方叶青,陈浩
FANG Ye-qing,CHEN Hao
摘要(Abstract)：
为了合理地利用资源、保护环境、降低回收成本、实现再生产品的高值化利用,采用微醇解解聚技术对废弃聚酯瓶片进行循环利用。通过工艺的探索及再生聚酯的测试,确定了较佳的工艺参数:EG质量分数0.01%～0.05%,微醇解时间10～20 min,聚合时间120～150 min。同时对物理法及微醇解法再生聚酯切片进行了凝胶色谱测试,结果表明:微醇解法制备的再生聚酯的特性黏度为0.75～0.77 dL/g,这有利于纺制高品质的长丝;微醇解法再生聚酯切片的数均分子质量、重均分子质量、Z均分子质量等均比物理法再生聚酯切片的高,且相对分子质量分布更窄。
In order to rationally utilize resources, protect the environment, reduce the cost of recycling, and realize the high value utilization of recycled products, the micro glycolysis technology was used to recycle waste PET bottles. Through the exploration of the process and the test of regenerated polyester, the better process parameters were determined: EG mass fraction 0.01%～0.05%, micro glycolysis time 10～20 min,and the polymerization time 120～150 min. At the same time, the physical method and regenerated polyester chips were tested by gel chromatography. The results showed that the prepared regenerated polyester had an intrinsic viscosity of 0.75～0.77 dL/g, which was advantageous for spinning high-quality filaments. The number average molecular weight, weight average molecular weight and Z-average molecular weight of the micro glycolysis-regenerated polyester chips were higher than those of the physical-regenerated polyester chips, and the molecular weight distribution was narrower.
关键词(KeyWords)：
再生聚酯;微醇解;特性黏度;二甘醇;端羧基
regenerated polyester;micro glycolysis;intrinsic viscosity;DEG;terminal carboxyl group
基金项目(Foundation):
作者(Author):
方叶青,陈浩
FANG Ye-qing,CHEN Hao
DOI: 10.16090/j.cnki.hcxw.20190808.001
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