DOI: https://doi.org/10.15421/081803

THE EFFECT OF SURFACE MODIFICATION OF PARTICULATE KCL FILLER ON RHEOLOGICAL BEHAVIOUR OF ITS PASTE-LIKE COMPOSITES

Alexandr B. Surovtcev, Anton M. Polyvianyi, Viktor S. Tokarev, Mykhaylo P. D'yachenko, Oleh M. Shevchuk, Stanislav V. Tokarev

Abstract


The paste-like composites of particulate KCl filler in a liquid rubber were prepared and their rheological properties were studied using a cone-and-plate rotation viscometer. Effects of the nature and concentration of surfactant added to composite, as well as the surface modification of KCl particles by functional polyperoxide on rheology of the paste prepared are discussed in this paper. In case of unmodified filler, temperature enhanced and surfactants added brought about some reduction of the paste viscosity, while effect of the KCl surface modification by functional polyperoxide was more complicated. At room temperature such modification brought about essential reduction of the paste viscosity (by 1.5–2 times) imparting them flowability; however after heating, these pastes demonstrated a manifold growth in viscosity because of interaction of functional polyperoxide with macromolecules of liquid rubber and the formation of interphase chemical bonds. Thus, preheating of the pastes containing peroxide-modified filler allows to control their rheological properties.


Keywords


rheological properties, high-filled paste-like composites, particulate filler, surface modification of filler, liquid rubber, surfactants, polyperoxide

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