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Stretchable wires and electrodes were printed on a textile substrate using a polyurethane-based conductive paste with silver fillers loading. Variation in their electrical resistivity was examined during a cyclic uniaxial tensile test at 10 % strain. The resistivity decreased to approach an equilibrium value when the sample was fixed at 10 % strain. The resistivity also exhibited a similar time-dependency...
Novel design concept to improve stability in electrical conductivity of elastomer-based conductive pastes (stretchable conductive pastes) during cyclic mechanical tension was proposed in this work. Silver (Ag) micro-flakes were selected as the main conductive fillers to prepare polyurethane-based conductive pastes. By modifying this singlemodal conductive paste with Ag micro- and nanoparticles, two...
Fatigue damage induced in a polyurethane-based electrically conductive adhesive under a uniaxial cyclic tension was analysed. The electrical resistance was not found to be determined uniquely with the strain. The increase in the electrical resistance induced by stretching the adhesive is divided into the time-dependent component and the intrinsic increase. The viscoelastic recovery of the electrical...
In this paper we examined the fatigue behavior of stretchable printed wires using electrically conductive pastes loaded with Ag flakes and microparticles, mixed into a polyurethane-based binder. The fatigue test damaged the stretchable wires by two different mechanisms, including cracking and binder softening (Mullins softening). The damage caused by binder softening could be recovered by annealing...
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