有机磷阻燃剂对阻燃玻璃钢性能的影响

EFFECTS OF ORGANOPHOSPHORUS RETARDANT ON PERFORMANCES OF FLAME RETARDANT FIBER REINFORCED PLASTICS

在阻燃型玻璃钢复合材料结构件的制作中,反应型阻燃不饱和聚酯树脂由于粘度太大,不适合真空辅助树脂传递模塑工艺(VARTM)。采用添加液体有机磷阻燃剂甲基磷酸二甲酯(DMMP)的方法,降低树脂粘度以满足VARTM工艺性能要求,并进一步提高其阻燃性。结果表明,当DMMP添加量为12%时,树脂粘度降低50.3%,适合VARTM工艺;其浇铸体氧指数可达31.6%,制得的玻璃钢试样氧指数达37.0%,垂直燃烧分级达到V-0级,玻璃钢复合材料力学性能无明显降低。

During the process of making structure components of flame retardant fiberglass reinforced plastic composite materials,the viscosity of unsaturated polyester resin with reactive flame retardant groups is too large to be used in Vacuum-Assisted Resin Transfer Molding(VARTM) process.In this paper,a large amount of tests were conducted by the way of adding flame retardant of dimethyl methyl phosphate(DMMP) so as to make the resin fit for VARTM processing properties requirements as well as increase its flame retardant properties to a higher level.The results showed that,when the content of DMMP was 12%,the resin could be provided with lower viscosity with a reduction of 50.3%,making it possible for the resin to be used in vacuum import process.When the content of DMMP reached 12%,LOI of the casting body reached 31.6,with LOI of glass fiber reinforced plastic of 37.0%,the vertical burning classification of which reached V-0 level without significant drop on mechanical properties of fiberglass reinforced plastics.