Preparation and characterizations of flame-retardant and heat-conductive polycarbonate-based composites with boron nitride and phosphaphenanthrene

Abstract

Abstract: A series of flame-retardant and heat conductive polycarbonate （PC） composites with boron nitride （BN） and phosphafetriazine compound （TAD） was prepared， and its flame retardancy and thermal conductance were investigated. Combustion experimental results indicated that the incorporation of BN and TAD improved the flame-retardant performance of PC effectively. The PC composite containing 20 wt% BN and 3 wt% TAD reached a UL 94 V-0 level in the vertical burning test， and its limiting oxygen index was 35.1 vol%. Cone calorimetric experimental results indicated that the BN/TAD flame-retardant and thermal conductive system effectively reduced the peak heat release rate， total heat release， effective heat of combustion， and other performance parameters， and it could generate an excellent synergistic char-forming effect in the condensed phase， resulting in excellent flame-retardant performance for PC. Moreover， the PC/BN/TAD composite system obtained an increased in the thermal conductivity by 320 % compared to pure PC， indicating high thermal conductance along with excellent flame-retardant performance of the PC-matrix composites.

Key words: polycarbonate, flame retardant, thermal conductivity, cocarbonization

References

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