【摘要】 以反应型磷-硅一体阻燃剂为主体阻燃剂,低黏度液体阻燃剂为强化阻燃剂,协同强化阻燃的同时提升体系的工艺性能。通过探究不同组分对双酚F型环氧树脂耐热性能、工艺性能、力学等性能的影响,制备一种60℃下适用期达1 h的高效无卤阻燃环氧树脂体系。结果表明:该树脂体系力学性能优良,固化后拉伸强度达72.4 MPa,弯曲强度达105 MPa,冲击韧性达8.43 kJ/m~2;阻燃防火性能优异,氧指数可达30.0,阻燃级别可达UL-94-VO,无余焰时间,离火立熄。使用VARI工艺成型的玻璃纤维复合材料,力学性能突出,拉伸强度可达459 MPa,弯曲强度达612 MPa,层间剪切强度达52.4 MPa,其综合性能与已商业化的无卤阻燃预浸料性能基本相当。更多还原

【Abstract】 The core of the flame retardant was a novel reactive phosphorus-silicone and the low viscosity liquid flame retardant improve the processing property of the system, synergistically intensifying the property of the flame retardant. Synthetically considering the influence of different components on the flame retardancy, thermal and mechnical properties of the resin system, a high-efficiency flame retardant epoxy resin with molding interval time for 1 hour at 60 ℃ is prepared, for which the tensile strength, flexural strength and impact toughness are 72.4 MPa, 105 MPa and 8.43 kJ·m^-2. The results reveal that V-0 level is reached during the UL-94 vertical combustion, the oxygen index（LOI） can be promoted up to 30.0 and the resin exhibits self-extinguish away from the fire. Composite materials of the resin immediately exhibit excellent mechanical properties, for which the tensile, flexural and shear strength are 459 MPa, 612 MPa and 52.4 MPa. The flame retardant and mechanical properties of the resin are comparable to the commercial halogen-free flame retardant prepregs.更多还原