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利用氧指数(LOI)、UL-94测试、锥形量热仪(CONE)和热失重分析技术(TG)探讨了十溴二苯乙烷(DBDPE)与Sb2O3协同阻燃SBR时的协同效应及热失重行为。结果表明,当阻燃剂总用量为40份且DB-DPE/Sb2O3配比为23/7时,SBR胶料的LOI达到26.5%,UL-94为V-1级,热释放速率大幅降低,DB-DPE与Sb2O3复合阻燃SBR时表现出一定程度的协同作用。热失重研究表明,在空气气氛下DBDPE与Sb2O3反应产生的HBr气体能够消耗橡胶高分子降解时产生的自由基,延缓或终断了燃烧时的链反应;该气体是一种难燃气体,其密度比空气大,可在高分子材料表面形成屏障,降低可燃性气体的浓度,具有良好阻燃效果。
The synergistic effect of DBDPE and Sb2O3 in synergistic flame retardant SBR was investigated by using LOI, UL-94, CONE and TG. Weight loss behavior. The results showed that the LOI of the SBR was 26.5% when the total amount of flame retardant was 40 and the DB-DPE / Sb2O3 ratio was 23/7. The UL-94 level was V-1, the heat release rate was greatly reduced, DB-DPE and Sb2O3 composite flame retardant SBR showed a certain degree of synergy. Thermogravimetric studies have shown that the HBr gas produced by the reaction of DBDPE with Sb2O3 in an air atmosphere can consume free radicals generated during the degradation of the rubbery polymer and delay or terminate the chain reaction during combustion; the gas is a flammable gas, Density than the air, the surface of polymer materials to form a barrier to reduce the concentration of flammable gases, with good flame retardant effect.