Analysis of morphology development in immiscible Newtonian polymer mixtures during shear flow

The aim of this work was to investigate the influence of morphology evolution in immiscible blends of Polyisobutene/(Polydimethylsiloxane) on their rheological properties both in steady and transient states under linear and nonlinear flow regimes. The focus was made on the region below the critical shear rate of drops breakup. Such critical shear rate was determined experimentally through a new route using small angle light scattering technique. Interfacial shear stress, first normal stress difference and shear viscosity of the blend were measured in steady shear regime below the critical shear rate and the obtained results were compared to the predictions of the model of Yu et al. [Yu, W., M. Bousmina, M. Grmela, and C. Zhou, “Modeling of oscillatory shear flow of emulsions under small and large deformation field,” J. Rheol. 46, 1401–1418 (2002a) and Yu, W., M. Bousmina, M. Grmela, J. F. Palierne, and C. Zhou, “Quantitative relationship between rheology and morphology in emulsions,” J. Rheol. 46, 1381–13...