Bhoite Sangram P, Kim Jonghyuck, Jo Wan, Bhoite Pravin H, Mali Sawanta S, Park Kyu-Hwan, Hong Chang Kook
School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea.
HDC HYUNDAI EP R & D Center, Yongin-si 16889, Korea.
Polymers (Basel). 2022 Aug 30;14(17):3570. doi: 10.3390/polym14173570.
A low-cost and effective flame retarding expanded polystyrene (EPS) foam was prepared herein by using a hybrid flame retardant (HFR) system, and the influence of gypsum was studied. The surface morphology and flame retardant properties of the synthesized flame retardant EPS were characterized using scanning electron microscopy (SEM) and cone calorimetry testing (CCT). The SEM micrographs revealed the uniform coating of the gypsum-based HFR on the EPS microspheres. The CCT and thermal conductivity study demonstrated that the incorporation of gypsum greatly decreases the peak heat release rate (PHRR) and total heat release (THR) of the flame retarding EPS samples with acceptable thermal insulation performance. The EPS/HFR with a uniform coating and the optimum amount of gypsum provides excellent flame retardant performance, with a THR of 8 MJ/m, a PHRR of 53.1 kW/m, and a fire growth rate (FIGRA) of 1682.95 W/ms. However, an excessive amount of gypsum weakens the flame retardant performance. The CCT results demonstrate that a moderate gypsum content in the EPS/HFR sample provides appropriate flame retarding properties to meet the fire safety standards.
本文采用混合阻燃剂（HFR）体系制备了一种低成本且有效的阻燃膨胀聚苯乙烯（EPS）泡沫，并研究了石膏的影响。使用扫描电子显微镜（SEM）和锥形量热测试（CCT）对合成的阻燃EPS的表面形态和阻燃性能进行了表征。SEM显微照片显示了基于石膏的HFR在EPS微球上的均匀包覆。CCT和热导率研究表明，加入石膏大大降低了阻燃EPS样品的峰值热释放速率（PHRR）和总热释放量（THR），同时具有可接受的保温性能。具有均匀包覆且石膏用量最佳的EPS/HFR具有优异的阻燃性能，THR为8 MJ/m，PHRR为53.1 kW/m，火灾增长速率（FIGRA）为1682.95 W/ms。然而，过量的石膏会削弱阻燃性能。CCT结果表明，EPS/HFR样品中适量的石膏含量可提供适当的阻燃性能，以满足消防安全标准。
