Ionization equilibria and conformational transitions in polyprotic molecules and polyelectrolytes

Article Abstract:

The coupling between proton binding and conformational degrees of freedom in polyprotic molecules and polyelectrolytes is studied theoretically by combining the classical rotational isomeric state (RIS) model developed by Flory and the site binding (SB) model used to treat proton binding equilbria. The model rationalizes the very different titration behavior of poly(acrylic acid) (PAA) and poly(methacrylic acid) (PMAA).

Methods, Analysis, Conformational analysis, Binding sites (Biochemistry), Active sites (Biochemistry), Ionization, Structure

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Clouding: Origin phase separation in oppositely charged polyelectrolyte/Surfactants mixed solutions

Article Abstract:

A study to investigate the phase behavior in the system of cationic modified poly (vinyl alcohol) (CPVA), sodium dodecylsulfate (SDS), and water was conducted. The clouding phenomenon was proven to be the origin of the phase separation in the CPVA-SDS mixed system.

Surface active agents, Surface Active Agent Manufacturing

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Modelling layer-by-layer assembly of flexible polyelectrolytes

Article Abstract:

The layer-by-layer assembly process of flexible polyelectrolytes on flat surfaces is modelled. An exponential growth is found for the first several layers, followed by a linear growth for subsequent layers evolving toward a steady state.

Polymers

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