Relevance of swelling corrections in a polyelectrolyte chain below six dimensions

Relevance of swelling corrections in a polyelectrolyte chain below six dimensions

2014 The importance of swelling corrections in the field-theoretic model describing an isolated, unscreened polyelectrolyte chain below six dimensions is examined using the renormalization theory of higher composite operators. Evidence is given of the relevance of these corrections below an unspecified dimension d* 6, when the unphysical exact result 03BD = 2/( d 2) breaks down and the system i...

Unscreened polyelectrolyte chain in d dimensions : a Monte Carlo simulation

Polyelectrolyte chain dimensions and concentration fluctuations near phase boundaries

We have measured the temperature ~T! dependence of the correlation length ~j! for concentration fluctuations in aqueous solutions of sodium–poly~styrene sulfonate! with a fixed level of added barium chloride salt. Apparent critical behavior is observed upon lowering the temperature to precipitation phase boundaries that complements our earlier work on salt-dependent behavior. We interpret exper...

Dynamic measurements on polymer chain dimensions below the -temperature

2014 To observe the contraction of a flexible chain, quasi-elastic light scattering and viscosity experiments were performed below the 03B8-temperature. The systems used were monodisperse polystyrene (Mw = 1.71 x 105, Mw =4.11 105, Mw = 1.26 106) dissolved in cyclohexane. It is observed that : 2014 Hydrodynamic and viscosity expansion factors, 03B1H and 03B13~, scale with the reduced variable (...

The entropy of water in swelling PGA/PAH polyelectrolyte multilayers.

We investigated the thermodynamical properties of water exchanged in poly(l-glutamic acid)/poly(allylamine)hydrochloride (PGA/PAH) polyelectrolyte multilayers containing ferrocyanide. Oxidation/reduction of the ferrocyanide in the multilayer caused a reversible swelling/contraction of the film due to the uptake/release of counter ions and water. We used electrochemical quartz crystal microbalan...