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Synthesis, structure-property and flame retardancy relationships of polyphosphonamide and its application on epoxy resins

机译：聚膦酰胺的合成，结构性和阻燃关系及其对环氧树脂的应用

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摘要

A series of polyphosphonamides (PPDA) with heteroatoms and phosphonamide structures are proposed as highly effective flame retardants in epoxy resins (EP). The PPDAs were synthesized by solution polycondensation and well characterized. The impact of the heteroatoms on the thermal properties, pyrolysis route and flammability of PPDAs and their EP composites was investigated in detail. All the PPDAs show good thermal stability, high glass transition temperatures (T-g) and low flammability, associated to their backbone structures. With the addition of PPDAs, the flame retardancy of the composites was gradually enhanced. It is noteworthy that the heat release rate and thermal properties highly depend on the chemical environment of the phosphorus atom in PPDAs. The flame retardant mechanisms are suggested to enhance the charring of EP, protect the matrix in the condensed phase, and have a flame inhibition effect in the gas phase. The potential for increasing flame retardancy and maintaining high Tg and high fracture toughness is highlighted in this study.
机译：提出了具有杂原子和磷酰胺结构的一系列多膦酰胺（PPDA）作为环氧树脂（EP）中的高效阻燃剂。通过溶液缩聚合成PPDA，其特征良好。详细研究了杂原子对PPDA的热性质，热解途径和可燃性的影响及其对复合材料。所有PPDA显示出良好的热稳定性，高玻璃过渡温度（T-G）和低易燃性，与其骨干结构相关。随着PPDA的添加，复合材料的阻燃性逐渐增强。值得注意的是，热释放率和热性能高度取决于PPDA中磷原子的化学环境。建议阻燃机制增强EP的炭化，保护基质在冷凝相中，并在气相中具有火焰抑制效果。在本研究中强调了增加阻燃性和维持高Tg和高裂缝韧性的可能性。

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  • 来源
    《RSC Advances》 |2017年第79期|共12页
  • 作者

    Zhao Wei; Wang Gong; Liu Jiping; Ban Daming; Cheng Tianjin; Liu Xiaodong; Li Yongxiang; Huang Yongqing;

  • 作者单位

    Chinese Acad Sci Technol &

    Engn Ctr Space Utilizat Beijing 100094 Peoples R China;

    Chinese Acad Sci Technol &

    Engn Ctr Space Utilizat Beijing 100094 Peoples R China;

    Beijing Inst Technol Sch Mat Sci &

    Engn Beijing 100081 Peoples R China;

    Guizhou Normal Univ Sch Chem &

    Mat Sci Guiyang 550001 Guizhou Peoples R China;

    Chinese Acad Sci Technol &

    Engn Ctr Space Utilizat Beijing 100094 Peoples R China;

    Chinese Acad Sci Technol &

    Engn Ctr Space Utilizat Beijing 100094 Peoples R China;

    Chinese Acad Sci Technol &

    Engn Ctr Space Utilizat Beijing 100094 Peoples R China;

    Shandong Univ &

    Technol Coll Chem &

    Environm Engn Qingdao 266590 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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