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首页> 外文期刊>Journal of Applied Polymer Science >Using ionic liquid catalyst for conversion of waste polyethylene terephthalate and soybean oil to polyester polyol
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Using ionic liquid catalyst for conversion of waste polyethylene terephthalate and soybean oil to polyester polyol

机译：使用离子液体催化剂将废旧的聚对苯二甲酸乙二醇酯和大豆油转化为聚酯多元醇

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摘要

An imidazolium ionic liquid was synthesized, characterized and used as a catalyst for conversion of polyethylene terephthalate (PET) and soybean oil to polyester polyol (PE polyol). The degradation of PET waste was carried out using glycerol and low cost soybean oil that resulted in the formation of PE polyols. Formed PE polyols were characterized using Fourier transform infrared (FT-IR) and mass spectra method, thermo gravimetric and differential thermal analysis and gel permeation chromatoghraphy. The first step in the overall process is proposed to be the transesterification of soybean oil with glycerol to form monoglyceride or/and diglyceride of soybean oil fatty acids. In the second step, the obtained glycerides can react with PET to form PE polyol. Both steps could be combined in one process and acidic catalyzed by an ionic liquid. Ionic liquid can be used as active catalyst and show a high reusability. The influence of some factors such as amount of glycerol used in transesterification of soybean oil with glycerol, PET degradation time, and temperature on PET conversion were investigated to find the suitable conditions for the process. Under suggested optimum parameters (mass ratio of soybean oil to glycerol of 2:1, a time of 8 h and a temperature of 180 degrees C for PET degradation), a PET conversion of 87.3% was reached. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43920.
机译：合成了咪唑鎓离子液体，进行了表征并用作将聚对苯二甲酸乙二酯（PET）和大豆油转化为聚酯多元醇（PE多元醇）的催化剂。 PET废料的降解使用甘油和低成本豆油进行，导致形成PE多元醇。使用傅立叶变换红外（FT-IR）和质谱法，热重和差热分析以及凝胶渗透色谱法对形成的PE多元醇进行表征。提出整个过程的第一步是大豆油与甘油的酯交换反应以形成大豆油脂肪酸的甘油单酯或/和甘油二酯。在第二步骤中，所获得的甘油酯可以与PET反应以形成PE多元醇。这两个步骤可以合并在一个过程中，并且可以通过离子液体进行酸性催化。离子液体可用作活性催化剂，并显示出高可重复使用性。研究了一些因素，例如大豆油与甘油的酯交换中所用的甘油量，PET的降解时间和温度对PET转化率的影响，以找到适合该工艺的条件。在建议的最佳参数下（大豆油与甘油的质量比为2：1，时间为8小时，温度为180摄氏度，PET降解），PET转化率为87.3％。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43920。

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