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首页> 外文期刊>Chemical and Biochemical Engineering Quarterly >Chemical Recycling of Postconsumer Poly(ethylene-terephthalate) Bottles - Depolymerization Study
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Chemical Recycling of Postconsumer Poly(ethylene-terephthalate) Bottles - Depolymerization Study

机译:消费后聚对苯二甲酸乙二醇酯瓶的化学回收-解聚研究

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摘要

Poly(ethylene-terephthalate), PET bottles waste was chemically recycled by glycolysis process. The glycolysis reaction was carried out at three temperatures 170, 180 and 190 °C in different time intervals (1,3,6 hours) with a weight ratio of ethylene glycol (EG) to PET 1:18 and the zinc acetate as a catalyst. The glycolysis reaction leads to formation of monomers bis(2-hydroxyethyl)terephthalate (BHET) and ethylene glycol as well as various types of PET oligomers. Depolymerization products were further characterized by infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). From the results it can be seen that remained PET products i.e. oligomers are thermally very stable and they are suitable for obtaining other polymers.
机译:聚对苯二甲酸乙二醇酯,PET瓶废料通过糖酵解工艺进行化学回收。糖酵解反应是在170、180和190℃这三种温度下,以不同的时间间隔(1、3、6小时)进行的,其中乙二醇(EG)与PET的重量比为1:18,乙酸锌为催化剂。糖酵解反应导致形成单体双(2-羟乙基)对苯二甲酸酯(BHET)和乙二醇,以及各种类型的PET低聚物。通过红外光谱(FTIR),差示扫描量热法(DSC)和热重分析(TGA)进一步表征了解聚产物。从结果可以看出,剩余的PET产物即低聚物是热非常稳定的,并且它们适合于获得其他聚合物。

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