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首页> 外文期刊>Polymers for advanced technologies >Functionalized ZrP nanosheet with free‐radical quenching capability and its synergism in intumescent flame‐retardant polypropylene
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Functionalized ZrP nanosheet with free‐radical quenching capability and its synergism in intumescent flame‐retardant polypropylene

机译：具有自由基淬火能力的官能化ZRP纳米片及其在膨胀型阻燃聚丙烯中的协同作用

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摘要

> The combination of catalyzing carbonization and free‐radical quenching mechanism is proposed to be a promising strategy for the preparation of high‐efficiency flame‐retardant polypropylene (PP). Herein, a novel functionalized zirconium phosphate (RQZrP) nanosheet with free‐radical quenching capability was fabricated by decorating macromolecular N‐alkoxy hindered amine (MNOR) onto the surface of ZrP. It was combined with an intumescent flame retardant (IFR) to flame‐retard PP. The results showed that there was a good synergism between RQZrP and IFR, which effectively improved the fire safety of PP. When the content of RQZrP was 2 wt% and IFR was 23 wt%, the limiting oxygen index (LOI) of PP increased from 19.0% to 33.0%, and it achieved a UL‐94 V‐0 rating. Meanwhile, the peak heat release rate (PHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO 2 P) were significantly decreased. It revealed that nitroxyl radicals generated by RQZrP could capture alkyl radicals and peroxy radicals that produced during the degradation and combustion of PP. Meanwhile, RQZrP acted as a solid acid that catalyzed PP chains rapidly cross‐linking to form char on its surface, and it also played as a supporting skeleton to enhance the strength and compactness of the char layer, thus effectively preventing the transmission of heat, oxygen, and combustible gases.
机译： > 提出催化碳化和自由基猝灭机理的组合是制备高效阻燃聚丙烯（PP）的有希望的策略。这里，通过在Zrp的表面上装饰大分子N-烷氧基受阻胺（MNOR）来制造具有自由基猝灭能力的新型官能化磷酸锆（RQZRP）纳米晶片。将其与膨胀阻燃剂（IFR）与火焰延迟PP相结合。结果表明，RQZRP和IFR之间存在良好的协同作用，从而有效提高了PP的火灾安全性。当RqZRP的含量为2wt％并且IFR为23wt％时，PP的限制氧指数（LOI）从19.0％增加至33.0％，并且它达到了UL-94 V-0等级。同时，峰值热释放率（PHRR），总热释放（THR），一氧化碳生产（COP）和二氧化碳生产（CO 2 p）显着降低。它揭示了由RqzRP产生的硝基根基团可以捕获在PP的降解和燃烧期间产生的烷基自由基和过氧基团。同时，RqzRP作为催化PP链快速交联以在其表面上形成焦炭的固体酸，并且它也作为支撑骨架，以提高炭层的强度和紧凑性，从而有效地防止热量的传播，氧气和可燃气体。

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  • 来源
    《Polymers for advanced technologies》 |2020年第3期|共14页
  • 作者

    Li Jiaxin; Lai Xuejun; Li Hongqiang; Zeng Xingrong; Liu Yuncong; Zeng Yunsheng; Jiang Changcheng;

  • 作者单位

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

    College of Materials Science and Engineering Key Lab of Guangdong Province for High Property and Functional Polymer MaterialsSouth China University of TechnologyGuangzhou China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    polypropylene; flame retardant; free‐radical quenching; catalyzing carbonization;

    机译：聚丙烯;阻燃剂;自由基淬火;催化碳化;

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