Nonlinear rheometry of entangled polymeric rings and ring-linear blends.

ABSTRACT: We present a comprehensive experimental rheological dataset for purified entangled ring polystyrenes and their blends with linear chains in nonlinear shear and elongation. In particular, data for shear stress growth coefficient, steady-state shear viscosity, and first and second normal stress differences are obtained and discussed as functions of shear rate as well as molecular parameters (molar mass, blend composition and decreasing molar mass of linear component in blend). Over the extended parameter range investigated, rings do not exhibit clear transient undershoot in shear, in contrast to their linear counterparts and ring-linear blends. For the latter, the size of the undershoot and respective strain appear to increase with shear rate. Universal scaling of strain at overshoot and fra

SUBMITTER: Parisi D 

PROVIDER: S-EPMC8896906 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature