以环氧树脂为基体，不同碳链链长分散剂改性的银粉为填料，制备出银导电胶。通过间接测量、计算分析的手段，研究了不同分散剂对银导电胶体积电阻率、剪切强度、黏度、触变及点胶性能的影响。结果表明，不同的分散剂对银导电胶的性能有很大影响，碳链长的饱和酸作为分散剂时，制备出的导电胶体积电阻率更低，触变和黏度也更大，剪切强度与分散剂的碳链链长呈反比，与分散剂有无双键无关，不饱和18个C的油酸作为分散剂时制备出的导电胶与饱和碳链的8个C的正辛酸性能相近。
A conductive silver adhesive was prepared using epoxy resin as matrix and silver powders modified by dispersant with different chain length. Effects of different dispersants on resistivity, shear strength, viscosity thixotropy and dropping properties of silver conductive colloids were studied. The results showed that the saturated acid with long C chain was more beneficial to the bulk resistivity of the conductive adhesive, meanwhile, the thixotropy and viscosity were higher while the shear strength was inversely proportional to the chain length of the dispersant.
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