The general flammability of polymer materials is a crucial problem to be solved in industrial applications. Polyphosphazenes, a kind organic-inorganic polymer and whose main chain is alternating by single and double bonds of phosphorus, nitrogen are endowed with excellent natural flame retardant synergies and thermal stability. Therefore, utilizing the designability of molecular structure and excellent flame retardant performance of polyphosphazene, a series of polyphosphazene flame retardants based on linear and cyclocrosslinked structures have been synthesized to improve the comprehensive properties especially the flame retardant properties, thermal stability and mechanical properties of materials, which is reviewed here. In particular, the molecular structure design and morphological changes of polyphosphazenes, flame retardant mechanism and the performance of flame retardant materials have been systematically discussed. As an important member of environmentally friendly halogen-free flame retardants, the challenges and opportunities encountered by polyphosphazene flame retardant materials have also been proposed in this review. In view of the excellent physical and chemical properties of polyphosphazenes, it's believed that an increasingly important role would be played by polyphosphazenes not only in flame retardant application but also in other application fields such as biomedicine and environmental adsorption.

聚合物材料的一般易燃性是工业应用中要解决的关键问题。聚磷腈是一种有机-无机聚合物，其主链由磷，氮的单键和双键交替排列，具有出色的天然阻燃协同作用和热稳定性。因此，利用聚磷腈的分子结构的可设计性和优异的阻燃性能，合成了一系列基于线性和环交联结构的聚磷腈阻燃剂，以提高材料的综合性能，特别是阻燃性能，热稳定性和机械性能，在这里进行评论。特别是聚磷腈的分子结构设计和形态变化，系统地讨论了阻燃机理和阻燃材料的性能。作为环保型无卤阻燃剂的重要成员，本综述还提出了聚磷腈阻燃材料所面临的挑战和机遇。鉴于聚磷腈的优异的物理和化学性质，人们认为聚磷腈不仅在阻燃剂应用中而且在其他应用领域（如生物医学和环境吸附）中将发挥越来越重要的作用。这篇综述还提出了聚磷腈阻燃材料所面临的挑战和机遇。鉴于聚磷腈的优异的物理和化学性质，人们认为聚磷腈不仅在阻燃剂应用中而且在其他应用领域（如生物医学和环境吸附）中将发挥越来越重要的作用。这篇综述还提出了聚磷腈阻燃材料所面临的挑战和机遇。鉴于聚磷腈的优异的物理和化学性质，人们认为聚磷腈不仅在阻燃剂应用中而且在其他应用领域（如生物医学和环境吸附）中将发挥越来越重要的作用。