The reinforcing efficiency of SBA-15-type mesoporous silica, when used as additive in epoxy polymers, was evaluated this study. effects silica loading and its physicochemical characteristics on the thermal, mechanical, viscoelastic properties glassy rubbery mesocomposites were examined using SBA-15 silicas with varying porosities (surface area, pore size, volume), particle sizes, morphologies, ...

Glassy polymers show "strain hardening": at constant extensional load, their flow first accelerates, then arrests. Recent experiments under such loading have found this to be accompanied by a striking dip in the segmental relaxation time. This can be explained by a minimal nonfactorable model combining flow-induced melting of a glass with the buildup of stress carried by strained polymers. With...

The present series of three consecutive papers develops a general theory for linear and fmite solid viscoelasticity. Because the most important object for nonlinear studies are rubber-like materials, the general approach is specified in a form convenient for solving problems important for many industries that involve rubber-like materials. General linear and nonlinear theories for non-isotherma...

the separation of olefin/paraffin mixtures is an important process in petrochemical industries, which is traditionally performed by low temperature distillation with a high-energy consumption, or complex extractive distillationand adsorption techniques. membrane separation process is emerging as an alternative for traditional separation processes with respect to low energy and simple operation....

We study the dynamics of a polymer or a D-dimensional elastic manifold diffusing and convected in a non-potential static random flow (the “randomly driven polymer model”). We find that short-range (SR) disorder is relevant for d ≤ 4 for directed polymers (each monomer sees a different flow) and for d ≤ 6 for isotropic polymers (each monomer sees the same flow) and more generally for d < dc(D) i...