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首页> 外文期刊>ACS Macro Letters >Thermally Healable and Reprocessable Bis(hindered amino)disulfide-Cross-Linked Polymethacrylate Networks
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Thermally Healable and Reprocessable Bis(hindered amino)disulfide-Cross-Linked Polymethacrylate Networks

机译：热可愈合和再加工的双（受阻氨基）二硫键 - 交联的聚甲基丙烯酸酯网络

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src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/amlccd/2017/amlccd.2017.6.issue-11/acsmacrolett.7b00762/20171115/images/medium/mz-2017-00762j_0006.gif">A facile approach to polymethacrylate networks that contain thermally exchangeable bis(2,2,6,6-tetramethylpiperidin-1-yl)disulfide (BiTEMPS) cross-linkers is reported, and the easily inducible healability and reprocessability of the obtained networks are discussed. The free radical polymerization of BiTEMPS cross-linkers and hexyl methacrylate (HMA) monomers afforded insoluble and colorless networks of poly(hexyl methacrylate) (PHMA) films, whose structures were characterized after de-cross-linking via thermal BiTEMPS exchange reactions with added low-molecular-weight BiTEMPS. Swelling experiments and stress-relaxation measurements at elevated temperatures revealed the contribution of BiTEMPS as a polymer chain exchanger both in the gels and in the bulk. The BiTEMPS-cross-linked PHMA networks showed damage healability and repeatable reprocessability in the bulk by simple hot pressing at 120 °C under mild pressure (～70 kPa). These results should grant facile access to various vinyl polymer networks with on-demand malleability.
机译：src =“http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/amlccd/2017/amlccd.2017.6.issue-11/acsmacrolett.7b00762/20171115/images/medium/mz报道了含有热交换性BIS（2,2,6,6-四甲基哌啶-1-基）二硫化物（比特型液）交联剂的聚甲基丙烯酸酯网的容易方法，并且易诱导凝固性讨论了所获得的网络的再加工性。比特型互联网和己基丙烯酸己酯（HMA）单体的自由基聚合得到了不溶性和无色网络的聚（己基甲基丙烯酸酯）（PHMA）膜，其结构在通过热比特膜的交换反应通过热比特蛋白酶交换反应进行了结转，其特征在于通过加入低 - 重量重量的比特仪。升高温度下的膨胀实验和应力松弛测量揭示了凝胶和散装中的比特仪作为聚合物链式交换器的贡献。在温和的压力下，在120℃下，在体积下在120℃（〜70kPa）下，比特型翻译PHMA网络在体积下造成损伤愈合性和可重复的再加工性。这些结果应赋予各种乙烯基聚合物网络的便利接触，随需按需延续性。

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  • 来源
    《ACS Macro Letters》 |2017年第11期|共5页
  • 作者

    Akira Takahashi; Raita Goseki; Kohzo Ito; Hideyuki Otsuka;

  • 作者单位

    Department of Organic and Polymeric Materials and Department of Chemical Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan;

    Department of Organic and Polymeric Materials and Department of Chemical Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan;

    Department of Advanced Materials Science The University of Tokyo 5-1-5 Kashiwanoha Kashiwa-shi Chiba 277-8561 Japan;

    Department of Organic and Polymeric Materials and Department of Chemical Science and Engineering Tokyo Institute of Technology 2-12-1 Ookayama Meguro-ku Tokyo 152-8550 Japan;

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  • 正文语种 eng
  • 中图分类 有机化学;
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