固化温度对道路补修用环氧树脂胶拉伸强度的影响研究  

Study on the effect of curing temperature on the tensile strength of epoxy resin adhesive for road repair

作　　者：史晓贞 祝李京 吴克宝 Shi Xiaozhen;Zhu Lijing;Wu Kebao(Wuhan Huazhong Science and Technology University Testing Technology Co.,Ltd.,Wuhan 430074,Hubei,China)

机构地区：[1]武汉华中科大检测科技有限公司,湖北武汉430074

出　　处：《中国胶粘剂》2023年第9期34-38,共5页China Adhesives

基　　金：国家自然科学基金委员会面上项目(51778262)。

摘　　要：使用E-51型环氧树脂、T31型固化剂、三种稀释剂等材料,对道路补修用环氧树脂胶试样进行制备。通过力学测试设备,测试不同固化温度对环氧树脂胶拉伸强度的影响。研究结果表明:(1)固化温度超过正常工作温度时,试样胶体会产生大量气泡,这些气泡会消耗胶体能量,增大环氧树脂胶的断裂伸长率,降低环氧树脂胶的抗拉伸强度。当固化温度为105℃时,胶样本的抗弯强度为90.6 MPa,抗压强度为128.9 MPa,此时试样力学性能较好。(2)固化温度越高,可提高试样粘接性能,但是过高的固化温度,会使胶体出现过固化现象,导致胶层比较脆弱,降低试样的T型剥离强度。当固化温度为85℃、固化时间为160 min时,试样粘接强度最佳,且添加CYD660型稀释剂可有效提高环氧树脂胶的力学性能。Epoxy resin adhesive samples for road repair were prepared by using materials such as E-51 epoxy resin,T31 curing agent,and three diluents.The effect of different curing temperatures on the tensile strength of epoxy resin adhesive was tested by using mechanical testing equipment.The research results showed that,(1)when the curing temperature exceeded the normal working temperature,the sample adhesive would generate a large number of bubbles,these bubbles would consume energy of adhesive,which increased the elongation at break of epoxy resin adhesive,and reduced the tensile strength of epoxy resin adhesive.When the curing temperature was 105℃,the bending strength and compressive strength of the adhesive sample were 90.6 MPa and 128.9 MPa respectively,indicating that the mechanical properties of the sample were good.(2)The higher the curing temperature,the better the bonding performance of the sample.However,an excessively high curing temperature could cause the adhesive to have excessive curing phenomenon,which resulted in a more fragile adhesive layer and reduced the T-peel strength of the sample.When the curing temperature was 85 C and the curing time was 160 minutes,the bonding strength of the sample was the best,and the addition of CYD660 diluent could effectively improve the mechanical properties of epoxy resin adhesive.

关 键 词：道路补修 环氧树脂胶 固化剂 稀释剂 固化温度 拉伸强度 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]