Authors: Herwin Jerome Unidad Giovanni Ianniruberto
Publish Date: 2014/01/15
Volume: 53, Issue: 2, Pages: 191-198
Abstract
Recent experiments by Li and Wang Macromolecules 435904–5908 2010 on parallel superposition flows of nearly monodisperse entangled polymer solutions revealing a flowinduced acceleration of the relaxation dynamics are here analyzed by using a simple differential constitutive equation based on the tube model to examine the role of convective constraint release CCR in these situations Contrary to the expectations of Wang and coworkers we find that such a flowinduced acceleration is not a CCR effect Rather our results suggest that the acceleration is simply due to convection per se not to be confused with CCR and to nonlinear orientation effectsThe authors would like to thank Xin Li for providing the data published by Li and Wang 2010 The authors are also grateful to the anonymous reviewers for their insightful comments that helped in improving the manuscript Financial support from the EU through the Marie Curie ITN DYNACOP project grant n° 214627 is also acknowledged
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