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Corn starch and cellulose were mixed in common solvent, ionic liquid 1-ethyl-3-methylimidazolium acetate (EMIMAc). The properties of mixtures in the liquid state (flow, viscosity, miscibility) and of films obtained via wet casting were investigated. No phase separation in mixtures was observed even at high polymer concentration studied (up to 10wt%). Mixture zero-shear rate viscosity plotted as a...
The formation and structure of interpolymer complexes between amphiphilic multi-block copolymers—poly(dimethylsiloxane-N-vinylpyrrolidone) and poly(dimethylsiloxane-methacrylic acid)—were studied using potentiometric and conductometric titration, viscometry and fluorescence spectroscopy. The ratio of hydrophobic/hydrophilic groups in the copolymer and the molecular weight of each sequence were varied...
The behaviour of a strongly charged polyelectrolyte gel under uniaxial compression was studied experimentally, demonstrating gel deformation and solvent loss at the same time. A theoretical interpretation used was based on a thermodynamic approach developed for weakly charged gels. The proposed approach was considered as a first approximation of the solution of the problem on gel volume loss under...
The kinetics of swelling of a strongly charged hydrogel is studied. The influence of external load on the rate of swelling and on the equilibrium degree of swelling is experimentally investigated. With the help of a sensitive technique it is shown that two different mechanisms governing the process of swelling may be clearly determined. The first one (at the beginning of swelling) is connected...
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