列车用复合材料阻燃性能研究

不同类别的阻燃剂配合使用能产生协效作用,大大提高阻燃效果。在甲基丙烯酸类不饱和聚酯树脂9001基体中,添加微囊化红磷/氢氧化铝/三氧化二锑/甲基膦酸二甲酯(MRP/Al(OH)3/Sb2O3/DMMP)阻燃剂体系,对其树脂体系固化物及玻璃纤维织物复合材料的力学性能和阻燃性能进行了实验研究,提出了一种有望用于列车复合材料大尺寸构件制造的性能优异、价格低廉的新体系。结果表明,当质量添加比例分别为12%MRP、50%Al(OH)3、2%Sb2O3时,树脂体系室温粘度100mPa.s左右,凝胶时间超过80min,适用于RTM和VIMP等大尺寸构件成型工艺;复合材料拉伸强度215.4MPa,弯曲强度177.15MPa,拉伸模量13.85GPa,弯曲模量13.36GPa,氧指数39.7。

The flame retardants of composites in carriage of train

Various kinds of flame retardants mixed together will improve the flame retardation significantly. Effects of a mixture of microencapsulated red phosphorus/aluminum hydroxides/stibium oxides/methyl phosphoric dimethyl on flame retardant performance and mechanical properties of the matrix resin 9001 were investigated, and a new price-advantages resin system which showed excellent mechanical and flame retardant performance was determined. The test results showed that the properties of resin 9001 with flame retardant system 12%MRP,50%Al(OH)₃,2%Sb₂O₃ is the best of all. Viscosity of the resin system at room temperature is about 100mPa·s, and the gel time of the resin is beyond 80 min, which satisfies the requirement of RTM and VIMP process for large composite parts. The tensile strength and modulus of the glass fabric reinforced the resin composites are 215.4MPa and 13.85GPa, respectively. The bending strength and modulus are 177.15MPa and 13.36GPa, respectively. And the LOI of the composites is 39.7.