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When doing research for shear-thinning. I come across to many interpreations.

  1. Shear-thinning is the non-Newtonian behavior of fluids whose viscosity decreases under shear strain.
  2. In other terms, the fluid possesses some kind of elasticity.
  3. This stems from some very complicated non-covalent Polymer-Particle interactions.

Are all of the above statements correct? If so, can you name a Polymer-Particle interaction that causes shear-thinning to happen?

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  • $\begingroup$ Not clear was the particle stand for. But there would be for sure some interaction, why not? That could be difficult to treat theoretically but must be non covalent, ie whatever goes under the umbrella terms of dispersive forces. I guess in this specific case they are modulated by the shape of the polymer chains too. For instance shear might flatten them, which in turn will effect the strength of the above polymer-particle interactions. $\endgroup$ – Alchimista Apr 6 at 8:02
  • $\begingroup$ Entanglement of polymer strands increases viscosity (resistance to a shear deformation) by facilitating momentum transfer between fluid layers. Increasing the rate of shear may reduce the extent of entanglement in which case the viscosity also decrease. This is nicely explained in the Wikipedia $\endgroup$ – Buck Thorn yesterday

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