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以膨胀蛭石为阻燃剂,采用中温发泡方法与酚醛树脂复合制备膨胀蛭石/酚醛阻燃保温复合材料。阻燃保温复合材料通过极限氧指数、锥形量热、导热系数和表观密度分析了发泡温度、固化剂含量、发泡剂含量、表面活性剂含量、固化时间以及蛭石含量对膨胀蛭石/酚醛阻燃保温复合材料阻燃及保温性能的影响。结果表明:以膨胀蛭石为阻燃剂制备的膨胀蛭石/酚醛阻燃保温复合材料的阻燃保温性能优越、表观密度低。单因素实验结果表明,膨胀蛭石/酚醛阻燃保温复合材料的最优条件为发泡温度80℃、固化剂含量10wt%、发泡剂含量10wt%、表面活性剂含量5wt%、固化时间2h以及蛭石含量60wt%。最优条件下的膨胀蛭石/酚醛阻燃保温复合材料表观密度为190.08kg/m3、压缩强度为0.32 MPa、导热系数为0.054 9 W/(m·K)、极限氧指数为71.1%、平均热释放速率为15kW/m~2。
The expansive vermiculite is used as a flame retardant, and the expanded vermiculite / phenolic flame retardant thermal insulation composite material is prepared by a medium temperature foaming method and a phenolic resin compound. The flame retardant and thermal insulation composites analyzed the influence of foaming temperature, curing agent content, foaming agent content, surfactant content, curing time and vermiculite content on the swelling leeches Effect of Stone / Phenolic Flame Retardant and Heat Retardant Composites on Flame Retardant and Thermal Insulation Properties. The results show that intumescent vermiculite / phenolic flame retardant and thermal insulation composites prepared by using expanded vermiculite as flame retardant have excellent flame retardant and thermal insulation properties and low apparent density. The results of single factor experiment showed that the optimum conditions of intumescent vermiculite / phenolic fire-retardant thermal insulation composites were: blowing temperature 80 ℃, curing agent 10wt%, foaming agent 10wt%, surfactant 5wt%, curing time 2h And vermiculite content of 60 wt%. Under the optimal conditions, the apparent density of expanded vermiculite / phenolic flame retardant composite was 190.08kg / m3, the compressive strength was 0.32 MPa, the thermal conductivity was 0.054 9 W / (m · K), the limit oxygen index was 71.1% The average heat release rate is 15kW / m ~ 2.