氯氧镁水泥对聚苯乙烯泡沫板阻燃性能及物理性能的影响

Effect of magnesium oxychloride cement on flame retardance and physical properties of polystyrene cystosepiment

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。

Polystyrene cystosepiment with flame retardance is prepared by impregnating polystyrene cystosepiment in magnesium oxychloride cement. The effects of different mole ratios and viscosity of magnesium oxychloride cement on flame retardant properties,density and tensile strength of polystyrene cystosepiment are studied. The results show that oxygen index can achieve 31. 7 when n（ Mgo） ∶ n（ Mg Cl_2·6H_2O） in magnesium oxychloride cement is 7 ∶ 1 and the viscosity of magnesium oxychloride cement is less than 2 000 MPa·s. However,when magnesium oxychloride cement is introduced,the density of the polystyrene cystosepiment is significantly enhanced but the tensile strength is decreased,compared with the pure EPS. At the same time,the trend that the density of polystyrene cystosepiment is inversely proportional to its tensile strength appears.