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首页> 外文期刊>Journal of Polymers and the Environment >One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters
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One-Pot Depolymerization and Polycondensation of PET Based Random Oligo- and Polyesters

机译：PET基无规低聚物和聚酯的单罐解聚和缩聚

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摘要

The glycolysis of PET is a promising well-developed technique that could be utilized in a wide range of processes. Due to its equilibrial nature, the high ratio of reagents and the purification steps it is an expensive process. In this study our goal was to modify the standard glycolysis to an easily modulateable method (acido-alcoholysis) suited for one-pot oligoester, polyester synthesis. Adipic acid was added to the depolymerization reaction to connect low molecular weighed components into oligoesters. PET depolymerization reaction series were carried out with ethylene-glycol/adipic acid and butane-1,4-diol/adipic acid to demonstrate the tuneability of these systems. The reaction products were thoroughly characterized with NMR, FTIR, TGA, DSC and functional group analysis. One-pot depolymerization-polycondensation reactions were engineered to produce unsaturated and saturated polyesters. The unsaturated polyesters were dissolved in styrene, cross-linked and moulded to be characterized with DMA. A decreasing tendency of the glass transition temperature and cross-link density were found in the function of the ratio of adipic acid used during the depolymerization step. Acido-alcoholysis proved to be a versatile technique that could be used to engineer oligoesters and polyesters. The reagent use can be minimalized, and the raw reaction products can be directly applied as mid-products.
机译：PET的糖酵解是一种有前途的，已发展成熟的技术，可以广泛应用于各种过程中。由于其平衡性质，高比例的试剂和纯化步骤，因此它是昂贵的过程。在这项研究中，我们的目标是将标准糖酵解法修改为一种易于调节的方法（酸-醇解法），适用于一锅低聚酯，聚酯的合成。将己二酸添加到解聚反应中，以将低分子量组分连接到低聚酯中。用乙二醇/己二酸和1,4-丁二醇/己二酸丁酯进行PET解聚反应系列，以证明这些系统的可调谐性。反应产物通过NMR，FTIR，TGA，DSC和官能团分析进行了彻底表征。设计一锅解聚-缩聚反应以生产不饱和聚酯和饱和聚酯。将不饱和聚酯溶解在苯乙烯中，进行交联，并模制以用DMA表征。发现玻璃化转变温度和交联密度的降低趋势是在解聚步骤中所用己二酸的比例的函数。事实证明，酸解醇解是一种通用技术，可用于工程化低聚酯和聚酯。可以最大程度地减少试剂的使用，并且可以将原始反应产物直接用作中间产物。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第10期|2167-2181|共15页
  • 作者

    Karpati Levente; Fogarassy Fanni; Kovacsik Daniel; Vargha Viktoria;

  • 作者单位

    Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, Lab Plast & Rubber Technol, Muegyetem Rkp 3HI, H-1111 Budapest, Hungary;

    Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, Lab Plast & Rubber Technol, Muegyetem Rkp 3HI, H-1111 Budapest, Hungary;

    Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, Lab Plast & Rubber Technol, Muegyetem Rkp 3HI, H-1111 Budapest, Hungary;

    Budapest Univ Technol & Econ, Dept Phys Chem & Mat Sci, Lab Plast & Rubber Technol, Muegyetem Rkp 3HI, H-1111 Budapest, Hungary;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    One-pot reaction; Polyesters; Acido-alcoholysis; NMR;

    机译：单壶反应;聚酯;酸甲醇分解;NMR;

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