Santos da Campo, Yan A.
Moreira, Kelly S.
Devens, Ana L.
dos Santos, Leandra P.
Burgo, Thiago A. L.
Total Authors: 8
 Univ Fed Santa Maria, Dept Chem, BR-97105900 Santa Maria, RS - Brazil
 Univ Fed Santa Maria, Dept Phys, BR-97105900 Santa Maria, RS - Brazil
Physical Chemistry Chemical Physics;
Web of Science Citations:
The recent discovery of electromechanical coupling in elastomers showed periodic electrification in phase with rubber stretching but following different electrostatic potential patterns. In this work, a Kelvin electrode monitored silicone and natural rubber electrification for extended periods until the rubber tubing underwent rupture. The electric potential of the rubber follows regular, quasi-sinusoidal patterns at the beginning and during the whole run, except when close to rubber fatigue failure, changing into complex waveforms. The attractors on natural latex and silicone rubber become chaotic at roughly 50 seconds before rubber rupture when the nearby orbits diverge wildly. Thus, mechanical-to-electrical transduction in rubber alerts fatigue failure nearly one minute ahead of the breakdown. Moreover, electrostatic potential maps of stretched rubbers show the electrification of the rupture sites, evidencing the electrostatic contribution to the breakdown. These results show the convenient features of electromechanical coupling in rubbers for the non-contact, real-time prediction of the rubber fatigue failure, adding to the possibility of environmental energy harvesting. (AU)