低卤协同阻燃SBR燃烧性能和热失重行为的研究

以丁苯橡胶（SBR）为主体材料,利用十溴二苯乙烷（DBDPE）、三氧化二锑（Sb2O3）、膨胀阻燃剂（IFR）和氢氧化铝（Al（OH）3）/红磷（P）复配制备了阻燃SBR。利用氧指数仪（LOI）、垂直燃烧试验仪（UL-94）、锥形量热仪（CONE）和热重分析仪（TG）研究了阻燃SBR的燃烧性能和热失重行为。结果表明,加入40份DB-DPE/Sb2O3/IFR、DBDPE/Sb2O3/Al（OH）3/P和DBDPE/Sb2O3/IFR/Al（OH）3/P阻燃体系,使SBR的LOI分别达到23%,25%,27%,PHRR值分别下降到564,747,536kW/m2,DBDPE/Sb2O3/IFR/Al（OH）3/P阻燃体系阻燃效果最好,具有低卤高效的阻燃性能;热失重研究表明,空气气氛下,在500℃时,DBDPE/Sb2O3与Al（OH）3/P不会发生反应,独立阻燃;在800℃时,SBR/DBDPE/Sb2O3/IFR/Al（OH）3/P阻燃SBR残炭量最高,说明随着温度的升高,阻燃剂之间逐渐发生反应,协同阻燃,有效地促进成炭,从而提高了试样的阻燃性能。

Research on the Burning and Thermo-gravimetric Behavior of SBR

Flame retardant SBR were prepared by using styrene butadiene rubber （SBR） as the main material, and Sb2Oa,DBDPE, IFR,AI（OH）aand P as flame retardant. Oxygen index （LOI）, Vertical burning test instrument （UL-94）, Cone calorimeter testing （CONE） and TG were used to study the burning and thermo-gravimetric behavior of SBR. The results showed that the LOI of the SBR could go up to 23% ,25% ,27%, and PHRR decreased to 564,747,536kW/m2 by adding the flame retardant system of DBDPE/Sb203/IFR, DBDPE/Sb203/A1 （OH）3/P and DBDPE/SbzO3/IFR/ AI（OH）3/P at 40 phr. The effect of DBDPE/Sb203/IFR/AI（OH）3/P flame retardant was best, which had low-halogen and high efficiency on flame retardancy. Thermo-gravimetric analysis showed that, under air atmosphere, DBDPE/SbzO3 and AI（OH）3/P did not react at 500 ~C, displaying inde- pendently in flame retardant. The residual char content of SBR with DBDPE/Sb203/IFR/AI（OH）3/P was highest at 800 ~C, because with the increasing of temperature, flame retardant reacted with Char- ring, played a synergistic effect on flame-retarding and promoted Charring, thereby improving flame retardant properties of the sample.