Volume 76, Number 2, October 2006
|Page(s)||278 - 284|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||08 September 2006|
Spectral hole burning to probe the nature of unjamming (Payne effect) in particle-filled elastomers
Applied Physics Research Group, Bridgestone Americas, Center for Research and Technology - 1200 Firestone Parkway, Akron, OH 44317-0001, USA
Accepted: 21 August 2006
The Payne effect is a low-strain hysteretic softening in particle-filled elastomers which we recognize as part of jamming physics. We find that aging at a fixed oscillatory strain produces a hole in the unjamming loss modulus spectrum which is localized near the aging strain for a silica-filled elastomer. This cannot be predicted by any existing Payne effect model. By applying the Einstein fluctuation-dissipation relation and comparing our findings to nonequilibrium glassy behavior, we show that oscillatory strain amplitude in particle-filled elastomers can be interpreted as an effective temperature.
PACS: 64.70.Dv – Solid-liquid transitions / 81.05.Qk – Reinforced polymers and polymer-based composites / 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids
© EDP Sciences, 2006
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