Salvatore Costanzo

TL;DR: The results demonstrate that the flow properties of nanocomposites are complex and can be tuned via changes in filler loading, that is, the character of polymer bridges which ‘tie' NPs together into a network.

TL;DR: In this article, the authors investigate the nonlinear shear and uniaxial extensional rheology of entangled polystyrene (PS) melts and solutions having the same number Z of entanglements, hence identical linear viscoelasticity.

TL;DR: In this article, the authors present linear and nonlinear shear rheology data of an experimentally pure ring polystyrene and its linear precursor, showing that rings are much less shear thinning compared to their linear counterparts, whereas both obey the lattice animal-based model.

TL;DR: In this article, the steady-state shear viscosity of unconcatenated ring polymer melts as a function of the shear rate γ is studied by a combination of experiments, simulations, and theory.

TL;DR: A series of homologous dendronized polymers with generations (g) 1 − 3 and backbone nominal degrees of polymerization (Pn) in the range 50 −3000 have been synthesized and characterized in order to investigate the g- and Pn-dependent viscoelastic properties and packing of this class of densely grafted, associating and effectively “thick” macromolecules in their molten state as mentioned in this paper.