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Hopes Beyond PET Recycling: Environmentally Clean and Engineeringly Applicable

机译：超越PET回收的希望：环境清洁和工程适用

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摘要

Disposal of plastics in the environment has become a core of anxiety in developing countries, while in the developed countries the focus has additionally been placed on design and manufacture of emerging products from plastic wastes-a somewhat vague yet promising horizon. Central to environmental concerns are poly(ethylene terephthalate) (PET) wastes, mainly from post-consumer bottles. Because of a considerable drop in molecular weight in the course of recycling, recycled PETs are not suitable for engineering uses. An efficient yet reasonably green synthesis route is employed here to convert PET wastes into polyurethane, and then carbon nanotubes (CNTs) was added at different levels to obtain nanocomposites with high mechanical properties. The effects of isocyanate (NCO)/hydroxyl (OH) molar ratio and CNTs content on the morphology, physical and mechanical properties were discussed. Chemical/physical crosslink density was calculated from initial slope of stress-strain curves, Mooney-Rivlin plots, strain-hardening modulus, rubbery-plateau storage modulus and swelling data. High tensile strength (300 MPa) and breaking elongation (160%) of polyurethane/CNTs nanocomposites born from PET wastes seemed promising. Microscopic analyses by AFM, SEM, and TEM gave useful information about distribution of CNTs in polyurethane. Lastly, structural changes were correlated to mechanical properties improvement.
机译：在环境中处置塑料已成为发展中国家的忧虑之心，而在发达国家，重点还放在设计和制造利用塑料废料生产的新兴产品上，这是一个模糊而又充满希望的视野。环境关注的中心是聚对苯二甲酸乙二醇酯（PET）废物，主要来自消费后的瓶子。由于在回收过程中分子量显着下降，因此回收的PET不适合工程用途。这里采用有效而合理的绿色合成路线将PET废料转化为聚氨酯，然后以不同的含量添加碳纳米管（CNT），以获得具有高机械性能的纳米复合材料。讨论了异氰酸酯（NCO）/羟基（OH）摩尔比和碳纳米管含量对形态，物理和机械性能的影响。化学/物理交联密度是根据应力-应变曲线的初始斜率，门尼-里夫林图，应变硬化模量，橡胶-高原储能模量和溶胀数据计算得出的。由PET废料产生的聚氨酯/ CNTs纳米复合材料的高拉伸强度（300 MPa）和断裂伸长率（160％）似乎很有希望。通过AFM，SEM和TEM进行的微观分析提供了有关CNT在聚氨酯中分布的有用信息。最后，结构变化与机械性能的提高相关。

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  • 来源
    《Journal of Polymers and the Environment》 |2019年第11期|2490-2508|共19页
  • 作者

    Shamsi Ramin; Sadeghi Gity Mir Mohamad; Vahabi Henri; Seyfi Javad; Sheibani Reza; Zarrintaj Payam; Laoutid Fouad; Saeb Mohammad Reza;

  • 作者单位

    Amirkabir Univ Technol Dept Polymer Engn & Color Technol Tehran Iran|Marun Petrochem Co Res & Dev Ctr Mahshahr Iran;

    Amirkabir Univ Technol Dept Polymer Engn & Color Technol Tehran Iran;

    Univ Lorraine Cent Supelec LMOPS F-57000 Metz France|Univ Paris Saclay Cent Supelec Lab Mat Opt Photon & Syst F-57070 Metz France;

    Azad Univ Shahrood Branch Dept Chem Engn POB 36155-163 Shahrood Iran;

    Marun Petrochem Co Res & Dev Ctr Mahshahr Iran;

    Urmia Univ Fac Engn Polymer Engn Dept Orumiyeh Iran|Amirkabir Univ Technol CPRC POB 15875-4413 Tehran Iran|ICS Adv Mat Grp POB 1591637144 Tehran Iran;

    Univ Mons UMONS LPCM Ctr Innovat & Res Mat & Polymers CIRMAP Pl Parc 20 B-7000 Mons Belgium|Univ Mons UMONS Materia Nova Res Ctr Pl Parc 20 B-7000 Mons Belgium;

    Univ Lorraine Cent Supelec LMOPS F-57000 Metz France|Univ Paris Saclay Cent Supelec Lab Mat Opt Photon & Syst F-57070 Metz France|ICS Adv Mat Grp POB 1591637144 Tehran Iran|Inst Color Sci & Technol Dept Resin & Addit POB 16765-654 Tehran Iran;

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  • 正文语种 eng
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  • 关键词

    Nanocomposites; PET waste; Polyurethane; CNTs; Recycling;

    机译：纳米复合材料;PET废料;聚氨酯碳纳米管;回收利用;

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