中温固化松香基环氧树脂碳纤维增强复合材料性能

Properties of rosin based epoxy resin carbon fiber reinforced composites cured at medium temperature

以生物质松香基马来海松酸酐(MPA)作为固化剂固化石油基E-54、AG-80和014U三种环氧树脂混合物,研究松香基环氧树脂基体及其复合材料的热性能和力学性能,评价其作为先进树脂基复合材料应用在航空飞行器主承力结构件的可能性,拓宽生物质环氧树脂应用领域。结果表明:固化后的环氧树脂具有较高的力学性能和热失重温度,配方F2树脂固化后玻璃化转变温度为156℃、拉伸强度为82.6 MPa、拉伸模量为3.05 GPa、断裂伸长率为4.2%、5%热分解温度约为370℃;以F2/U3160预浸料制备的复合材料层合板干态玻璃化转变温度为158℃,湿态玻璃化转变温度为123℃,干态力学性能与已经应用于直升机旋翼系统的3261/HT3复合材料性能相当,并具备较高的湿态力学性能保持率。

Biomass maleopimaric anhydride(MPA) was used as curing agent and petroleum based E-54,AG-80 and 014 U mixture was used as epoxy resin to study the thermal and mechanical properties of rosin based epoxy resin matrix and its composites,in order to further evaluate the possibility of its application in advanced resin matrix composites for main load-bearing structures of aircraft and to broaden the application field of biomass epoxy resin.The results show that the cured epoxy resin has high mechanical properties and thermogravimetric temperature.The glass transition temperature of formula F2 resin is 156 ℃,the tensile strength is82.6 MPa,the tensile modulus is 3.05 GPa,the elongation at break is 4.2%,5% thermal decomposition temperature is about 370 ℃.The dry glass transition temperature of composite laminates prepared from F2/U3160 prepreg is 158 ℃ and the wet glass transition temperature is 123 ℃.The dry mechanical properties are equivalent to those of 3261/HT3 composites which have been applied to helicopter rotor system,and have a high retention rate of wet mechanical properties.