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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