The ability to determine polymer elasticity and force-extension relations from polymer dynamics in flow has been challenging, mainly due to difficulties in relating equilibrium properties such as free energy to far-from-equilibrium processes. In this work, we determine polymer elasticity from the dynamic properties of polymer chains in fluid flow using recent advances in statistical mechanics. ...

The Oldroyd-B fluid has become the starting point for almost all complex flow calculations and analysis involving behavior of dilute polymer solutions. reasons this are clear: based on kinetic theory high molecular weight “phantom” chains near equilibrium, resulting model, in its simplest form, produces a single mode description solution constitutive equation terms symmetric dyad order paramete...

We are concerned here with the effect of added filler particles on the linear and non-linear rheological properties of viscoelastic systems. Whilst the addition of spherical or near-spherical filler particles will almost always increase the level of both the linear and the non-linear viscometric properties (so leading to increases in pressure drops, etc.), we usually find a decrease in the leve...

I. Fluid Rheology In this note (I of IV) we summarize the rheological properties of the test fluid in shear and extension. The viscoelastic fluid consists of an 0.025 wt% solution of monodisperse polystyrene (PS) (Scientific Polymer Products, Inc.) with a polydispersity of 1.03. The polystyrene is dissolved in oligomeric styrene (Hercules Piccolastic A5) to yield a dilute solution with c/c* = 0...

Two anthracene derivatives appended on cyclen (1,4,7,10-tetraazacyclododecane) moieties were synthesized and characterized. In these new compounds, the anthryl is used as a substitute for the nucleobases of classical PNA backbone, and the cyclen moiety appends on the terminal amino group. The interaction of the compounds with DNA was systematically investigated by absorption, fluorescence, and ...

We have previously presented a microelectromechanical system (MEMS) based viscometric sensor for continuous glucose monitoring using protein Concanavalin A (Con A). To address its drawbacks, including immunotoxicity and instability issues, we have synthesized stable, biocompatible copolymers poly(acrylamide-ran-3-acrylamidophenylboronic acid) (PAA-ran-PAAPBA) for viscosity based glucose sensing...