Colloidal–chemical and rheological properties of interfacial adsorption layers formed by soluble and poorly water-soluble block copolymers of ethylene oxide and propylene oxide

The colloidal-chemical properties of soluble and poorly water-soluble block copolymers of ethylene oxide and propylene oxide (pluronics), as well as the rheological properties of interfacial adsorption layers (IAL) formed by them and the polymer formed at the initiation of polymerization on the particle surface are studied. The influence of temperature, surfactant and polymer concentration on the values of the effective elastic modulus determined at lateral deformation of IAL is evaluated. The strongest interfacial layers are shown to be formed by low water-soluble pluronic containing a hydrophilic polyoxyethylene block surrounded by two hydrophobic polyoxypropylene blocks. The high strength of the interfacial adsorption layer on the particle surface is found to allow obtaining polymer suspensions with high polymer content (up to 33%) and narrow particle size distribution.