Interface motion and slipping layer formation in sheared polymer solutions

Akira Onuki

Physica A: Statistical Mechanics and its Applications, 1994, vol. 204, issue 1, 499-520

Abstract: We consider the motion of an interface when a solvent layer with thickness d appears between a semidilute polymer solution and a moving boundary wall. The layer serves as a slipping layer with small viscosity. If the temperature T is fixed at an equilibrium coexistence temperature Tcx, the thickness d generally decreases with increasing shear ⋗g and jumps from a finite value to zero for relatively large ⋗g. On the other hand, if ⋗g is fixed in the Newtonian region and T is lowered, d can jump from zero to a finite value at T slightly below Tcx. We introduce an osmotic bulk modulus Kst in two-phase coexistence under shear, the two-phase state being dynamically unstable for Kst < 0. In addition, we also propose nucleation experiments in weak shear.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:204:y:1994:i:1:p:499-520

DOI: 10.1016/0378-4371(94)90445-6

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