Highly conducting lithium polyelectrolytes based on maleic anhydride-styrene copolymers

Article Abstract:

The conductivity of solid and solvent-plasticized polyelectrolytes having immobilized carboxylic anions based on maleic anhydride-styrene copolymers has been studied. The polyelectrolytes were crosslinked by free-radical polymerization of the C-C bonds present in the side-chain terminal group in order to improve the mechanical properties of the gels obtained. Results show the conductivity of the solid comblike polyelectrolytes is dependent on the number of oxyethylene units incorporated to the side chain. The conductivity changes with temperature indicating that the motions of cations are linked with segmental motions of side polyether-type chains.

Electrical conductivity

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Effect of pH on the binding of beta-lactoglobulin to sodium polystyrenesulfonate

Article Abstract:

Frontal analysis continuous capillary electrophoresis was used in studying the binding of beta-lactoglobulins to sodium polystyrenesulfonate. This analytical method hastens the collection of protein-polyelectrolyte binding data in a rapid and reproducible manner. The obtained data were plotted on a modified Scatchard plot and the intrinsic binding constant was measured as a function of pH at an ionic strength of 0.05 M. Results indicate the binding of beta-lactoglobulin is very much dependent on the pH value. Binding takes place when the protein has a negative net charge and similar to the sign of the polyelectrolyte.

DNA-ligand interactions, DNA binding, Cooperative binding (Biochemistry)

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Quenching of excited state pyrene by halothane in poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) triblock copolymers

Article Abstract:

A study of the quenching of excited state pyrene by halothane in solutions of poly(oxyethylene)-poly(oxypropylene)-poly(oxyethylene) triblock copolymers at 25 degrees centigrade is presented.

Research, Chemical reaction, Rate of, Chemical kinetics, Halothane

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