Viscoelastic response of diblock copolymers to oscillatory shear.
A mesoscopic model for diblock copolymers is combined with a simple rheological description of the viscoelastic contrast of its two phases. Under oscillatory shear the contrast generates secondary velocity fields and substantial deviations of volume-averaged flow parameters. The validity of our analytical findings is tested with three-dimensional numerical simulations. Furthermore, we consider the effect of advection by the generated flows on the stability of ordered lamellar states and propose a new criterion for the selection of orientations.
Rüdiger
S
S
Physikalisches Institut, Universität Bayreuth, 95440, Bayreuth, Germany. sten.ruediger@hmi.de
D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D004548:Elasticity; D008956:Models, Chemical; D009991:Oscillometry / Q000379:methods*; D011108:Polymers / Q000032:analysis* / Q000737:chemistry*; D012212:Rheology / Q000379:methods*; D033081:Shear Strength; D013314:Stress, Mechanical; D014783:Viscosity
D011108:Polymers