From rheology of nanocomposites to rheology of polymer melts: step back or forward?

摘要

For all heterophase systems including polymer ones the relation between rheology and stream morphology becomes very important. The stable tendency to combine rheological tests with "in situ" or at least "post factum" morphology or structure exists for this kind of objects. Rheooptics (including light scattering, birefringence, microscopy), as well as such scattering methods as X-ray or neutron-scattering are using for estimation of interrelationship between evolution and transformation of structure in flow and rheological response [1-3]. This approach helped us to obtain unusual morphological pictures for flowing nanocomposites based on polymer matrices, consisting in self-arrangement of filler particles [4]. These results forced us to find the driving force of such ordering, coming back to rheology of viscoelastic polymer melts behavior at high shear rates. Our vision of interrelationships between rheological properties of nanocomposite precursors and polymer melts are considered in this paper.