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首页> 外文期刊>Journal of Polymers and the Environment >Effects of Saturated Acids on Physical Properties of UPE Resins Prepared from Recycled PET Products
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Effects of Saturated Acids on Physical Properties of UPE Resins Prepared from Recycled PET Products

机译：饱和酸对再生PET产品制备的UPE树脂物理性能的影响

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摘要

In this study, effects of saturated acids on physical properties, including hardness, impact strength, flexural properties and thermal properties, of unsaturated polyester or UPE resins prepared from recycled PET bottles and fabrics were investigated. PET was depolymerized by glycolysis reaction with the excess propylene glycol in the presence of zinc acetate as a catalyst. UPE resins were then synthesized by polyesterification of these glycolyzed products with maleic anhydride as an unsaturated diacid as well as succinic acid and adipic acid as a saturated diacid. With the addition of styrene monomer, UPEs were subsequently casted into specimens by crosslinking reaction using methyl ethyl ketone peroxide and cobalt octoate as an initiator and a catalyst, respectively. Physical properties of the cured specimens were then studied. The results showed that, when a saturated acid was incorporated, the hardness of the cured UPE resins decreased due to the decreasing amount of crosslinks. The extended distance between crosslinking sites on molecular chains facilitated load distribution, resulting in the significant improvement of impact strength. The flexural strength was also improved when the small amount of saturated acid was used. The onset thermal degradation temperatures and the glassrntransition temperatures of the prepared UPE resins were almost unchanged.
机译：在这项研究中，研究了饱和酸对由回收的PET瓶和织物制成的不饱和聚酯或UPE树脂的物理性能（包括硬度，冲击强度，挠曲性能和热性能）的影响。在乙酸锌作为催化剂的存在下，通过与过量的丙二醇的糖酵解反应使PET解聚。然后，通过用马来酸酐作为不饱和二酸以及琥珀酸和己二酸作为饱和二酸对这些糖基化产物进行聚酯化反应，合成UPE树脂。在添加苯乙烯单体的情况下，随后分别通过过氧化甲乙酮和辛酸钴作为引发剂和催化剂通过交联反应将UPE浇铸成样品。然后研究固化样品的物理性质。结果表明，当引入饱和酸时，由于交联量的减少，固化的UPE树脂的硬度降低。分子链上交联位点之间的延长距离促进了载荷分布，从而显着提高了冲击强度。当使用少量的饱和酸时，弯曲强度也得到改善。制备的UPE树脂的起始热降解温度和玻璃化转变温度几乎不变。

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  • 来源
    《Journal of Polymers and the Environment》 |2009年第2期|65-70|共6页
  • 作者

    K. Puangsansuk; M. Opaprakasit; W. Udomkichdecha; P. Potiyaraj;

  • 作者单位

    Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;

    Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;

    Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;

    Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand National Center of Excellence for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand;

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  • 正文语种 eng
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  • 关键词

    recycled; PET unsaturated polyester; glycolysis; esterification;

    机译：回收PET不饱和聚酯;糖酵解酯化;

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