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以自制的有机硅树脂为基体,通过添加耐热填料制得一种耐高温胶粘剂。探讨了无机耐热填料的受热温度、受热时间对胶粘剂剪切强度的影响。试验结果表明:当m(TiO2)∶m(ZnO)=1.0∶1.0时,胶粘剂在300℃时受热1 h,能够获得高达6.61 MPa的拉伸剪切强度;当受热时间延长至4 h时,胶粘剂仍可保持5.20 MPa的剪切强度;350℃受热1～4 h,胶粘剂获得了5.53～4.01 MPa的剪切强度;在400℃分别受热1 h和4 h,胶粘剂的剪切强度降至3.65 MPa和2.54 MPa。随着受热温度的升高、受热时间的延长,胶粘剂的剪切强度呈下降趋势。
To home-made silicone resin as the matrix, by adding heat-resistant filler to prepare a high temperature adhesive. The effects of heating temperature and heating time on the shear strength of inorganic fillers were discussed. The results show that when m (TiO2): m (ZnO) = 1.0:1.0, the tensile strength of the adhesive can reach as high as 6.61 MPa when it is heated at 300 ℃ for 1 h. When the heating time is prolonged to 4 h, The adhesive can still maintain the shear strength of 5.20 MPa; the shear strength of the adhesive obtained 5.53 ~ 4.01 MPa after heated at 350 ℃ for 1 ~ 4 h; the shear strength of the adhesive decreased to 3.65 after heated at 400 ℃ for 1 h and 4 h, respectively MPa and 2.54 MPa. With the increase of the heating temperature and the extension of the heating time, the shear strength of the adhesive tends to decrease.