Core-shell structure flame retardant, preparation method and application of core-shell structure flame retardant in preparation of low-smoke density material

The invention discloses a core-shell structure flame retardant, a preparation method and application of the core-shell structure flame retardant in preparation of a low-smoke-density material. The core-shell structure flame retardant comprises a structure with polytetrafluoroethylene as a core and styrene polymerized PAN-based carbon fibers as a shell. According to the flame retardant disclosed by the invention, the styrene polymerized PAN-based carbon fiber is taken as a shell, and the polytetrafluoroethylene is taken as a core, so that not only can the formation of a carbon layer be accelerated during combustion, but also the dispersing capacity of the polytetrafluoroethylene in matrix resin can be improved, and the mechanical property of the PC material can be improved. 本发明公开了一种核壳结构阻燃剂、制备方法及其在制备低烟密度材料中的应用，所述阻燃剂包含以聚四氟乙烯为核，以苯乙烯聚合PAN基碳纤维为壳的结构。本发明中阻燃剂以苯乙烯聚合PAN基碳纤维为壳，以聚四氟乙烯为核，不仅能在燃烧时加速碳层的形成，同时也能提高聚四氟乙烯在基体树脂中的分散能力，改善PC材料机械性能。