液体缠绕工艺用阻燃环氧树脂性能研究

Study on the Properties of Flame Retardant Epoxy for Liquid Winding Process

针对液体缠绕工艺用环氧树脂进行阻燃改性,研究阻燃剂添加量对树脂与复合材料性能的影响。结果表明阻燃剂加入使树脂黏度略有降低,固化反应活性无明显改变。随着阻燃剂含量提高,环氧树脂拉伸强度基本稳定而冲击强度有所下降,其中30 phr阻燃剂添加的环氧树脂相比0 phr冲击强度下降44.1%。另外随着阻燃剂含量增加,树脂热分解稳定性提高,但过多添加阻燃成分不利于炭化层稳定形成。综合以上研究,20 phr阻燃剂添加量的树脂体系阻燃效果最优,50 W垂直燃烧测试结果达到V-0级,且力学性能具有较好保持率。改性后树脂与T700SC制备的复合材料NOL环拉伸强度达2790 MPa,层间剪切强度为50.7 MPa,树脂与纤维具有良好的结合界面。

Aiming at the flame retardant modification of epoxy resin by liquid winding process,the effect of flame retardant addition amount on the properties of resin and composite material was studied.The results show that the viscosity of the resin decreases slightly with the addition of flame retardant,and the curing reactivity does not change significantly.With the increase of flame retardant content,the tensile strength of epoxy resin is basically stable but the impact strength is decreases.The impact strength of epoxy resin added with 30 phr flame retardant is decreased by 44.1%compared with 0 phr.In addition,with the increase of flame retardant content,the thermal decomposition stability of resin is improved,but excessive addition of flame retardant components is not conducive to the stable formation of carbonized layer.According to the above research,the resin system with 20 phr flame retardant additive has the best flame retardant effect,the 50 W vertical combustion test results reach V-0 level,and the mechanical properties have a good retention rate.The tensile strength of NOL ring prepared by modified resin on T700SC reached 2790 MPa,and the interlayer shear strength is 50.7 MPa.The modified resin and fiber have good interfacial bonding.