通过将氯氧镁水泥浸渍于聚苯乙烯泡沫板的缝隙中,制成具有阻燃性能的聚苯乙烯泡沫板。研究了氯氧镁水泥摩尔比、黏度对聚苯乙烯泡沫板的阻燃性能、密度和抗拉强度的影响。结果表明:当n(Mg O)∶n(Mg Cl_2·6H_2O)为7∶1,黏度小于2 000 MPa·s时,其氧指数较高,为31.7。然而氯氧镁水泥的加入会使纯聚苯乙烯泡沫板的密度大幅度增加,抗拉强度下降,同时表现出聚苯乙烯泡沫板密度和抗拉强度成相反比例趋势。 A polystyrene foam board having flame retardancy was prepared by immersing a magnesium oxychloride cement in a gap of a polystyrene foam board. The effects of molar ratio of magnesium oxychloride and cement on the flame retardancy, density and tensile strength of polystyrene foam board were studied. The results show that the oxygen index is 31.7 when the viscosity of n (MgO): n (MgCl_2 · 6H_2O) is 7:1 and the viscosity is less than 2 000 MPa · s. However, the addition of magnesium oxychloride cement will greatly increase the density of pure polystyrene foam board, tensile strength decreased, while showing the density and tensile strength of polystyrene foam into the opposite proportion trend.