环氧树脂室温固化体系的研制及性能研究

以兼具引发剂和稀释剂功能的自制BH-1为固化剂,通过引入低黏度活性稀释剂,制备室温固化EP(环氧树脂)胶粘剂;然后以EP/BH-1/活性稀释剂为基体、单向玻璃纤维为增强材料,制备相应的复合材料。研究结果表明:当w(BH-1)=4%时,EP浇铸体的室温(25℃)凝胶时间约为8.5 h和玻璃化转变温度(Tg)为130.9℃,并具有优异的力学性能,其冲击强度为50.0 kJ/m2、拉伸强度和模量分别为0.075 GPa和2.80 GPa、弯曲强度和模量分别为0.136 GPa和3.02 GPa;当m(EP)∶m(BH-1)∶m(活性稀释剂)=100∶4∶10时,复合材料的弯曲强度(0.984 GPa)和层间剪切强度(56.1 MPa)分别提高了26.4%和15.2%。

Study on preparation and properties of epoxy resin system with room temperature curing

With self-made BH-1,which had both initiator function and diluent function,as curing agent,an EP(epoxy resin) adhesive with room temperature curing was prepared by introducing low viscosity reactive diluent.Then,with EP/BH-1/reactive diluent as matrix,unidirectional glass fiber as reinforcing material,the corresponding composite was prepared.The research results showed that the gelation time at room temperature(25 ℃) and glass transition temperature(Tg) of EP casting were about 8.5 h and 130.9 ℃ respectively,and EP casting had also excellent mechanical properties when mass fraction of BH-1 was 4% because its impact strength,tensile strength,tensile modulus,bend strength and bend modulus were 50.0 kJ/m2 and 0.075,2.80,0.136,3.02 GPa respectively.The bend strength(0.984 GPa) and interlaminar shear strength(56.1 MPa) of composite were increased by 26.4% and 15.2% when mass ratio of m(EP)∶m(BH-1)∶m(reactive diluent) was 100∶4∶10.