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Placing of concrete requires much more water than the cement needs for its hydration. This results in a certain porosity in the hardened concrete, which facilitates chemical degradation of this material. By adding small amounts of polymeric admixtures, cal ...
Comprehensive counterion activity studies have revealed clear influence of the polyelectrolyte concn. and chain length on the polyion-counterion interaction, neither of which is evident from the existing theor. models. The counterion activity coeff. (fa) i ...
The partial molar volume, .hivin.V, and the partial sp. vol., .hivin.n, were estd. for more than 25 polyelectrolyte structures. The materials investigated by d. measurements in highly dild. aq. solns. (c < 10-2 monomol/L) included both synthetic polyelectr ...
Conductometry and potentiometry have been employed to examine the influence of macromol. parameters and chem. structure on the electrochem. behavior of flexible polyelectrolytes with finite chain length in the concn. range 10-6 < cp < 10-2 monomol.l-1. For ...
A brief review with 18 refs. is provided of the principal research and development activities of the Lab. of Polyelectrolytes and BioMacromols. at the Swiss Federal Institute of Technol. These include, in particular, the synthesis of tailor-made polyelectr ...
A method for encapsulating a core material within a capsule having a permeable or semipermeable membrane is disclosed using a complex formation reaction between oppositely charged polymers, wherein one of the polymers is an oligosaccharide such as chitosan ...
A general description of the electrolytic cond. behavior of highly charged strong polyelectrolytes in dil. and semidilute aq. solns. is presented. For the first time this model considers the effects of the molar mass, charge d. (for charge distances less t ...
