Steady shearing and planar extensional flows are kinematically equivalent such that the extensional viscosity can be reconstructed from shear material functions by removing the rotational component of shear.
The material is a ‘barely entangled’ semidilute solution and the modified entanglement number in the solution [30] is Zsol =(M/M e,0)ϕ1/(3ν−1)≃0.7
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Kinematic and rheological equivalence of steady shearing and planar extensional flows
Steady shearing and planar extensional flows are kinematically equivalent such that the extensional viscosity can be reconstructed from shear material functions by removing the rotational component of shear.