摘要：

We demonstrate experimentally that the unjamming (Payne effect) transition in filled rubbers behaves as an isoenergetic transition. The strength of the jamming state depends on the nature of filler’s particular associations that break up at certain critical mechanical energy. This isoenergetic behavior of the transition is not limited to the filled rubbers studied here, as it is also found to exist in many other systems, such as silica colloidal particles in oil, aqueous suspensions of boehmite alumina powders, and latex dispersions of polystyrene particles. This discovery allows all tested results at different frequency, shear rate, strain and stress be collapsed into one master curve. This superposition principle has important significance in nonlinear rheology of complex matters for it can be used to estimate mechanical properties from known properties at a reference state.

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个人简介:

Dr. Xiaorong Wang earned his Ph.D. in the Chemical Engineering and Material Science in 1994 from Syracuse University and worked as a Research Associate at Princeton University. He joined Bridgestone/Firestone Research in 1995, became a Senior Scientist of Key Management Band (KMB) in the company and served as the Project & Group Leaders for a number of research groups. Dr. Wang has over 100 invention disclosures, among them 84 inventions have been granted as international patents. Many of his inventions are now in commercial uses, ranging from tires to electronics. He authored and coauthored over 40 peer-reviewed paper publications. Dr. Wang in 2013 joined Shanghai Tongji University as a Distinguished Professor. His research interests include: anionic polymerization, molecular rheology, complex fluids, reinforcement, particle jamming, micro-phase engineering, damping, rolling resistance and traction.