Methods for Reducing Heat Release of Polymeric Materials
Organic polymeric materials,classified as one of the three major types of materials together with metal materials and inorganic non-metallic materials,are widely used in various fields of national economy and national defense construc-tion.However,due to their organic chemical structure,most polymer materials are flammable and easily ignited,leading to fire accidents and jeopardizing people's lives,health and property safety.Evaluation of flame-retardant polymeric materials is mostly focused on whether it is difficult to ignite,easy to self-extinguish,etc.,however,once ignited,the materials'heat release will directly determine whether it is easy to develop into a tragic fire disaster.Reducing the heat release of polymer materials during combustion can delay the time for the material to reach ignition,and provide more time for personnel es-cape.Here,this review focuses on the flame-retardant methods to reduce the heat release of polymeric materials,including"all-in-one"intumescent char-forming,organic/inorganic nanocomposites blocked layer,phosphorus based flame retardant and high-temperature char-forming based on self-crosslinking/rearrangement,and further in-depth discusses the challenges and the development trend of these methods in the future.
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