Abstract
Abstract The reaction of catalytic dehydrocondensation of dihydroorganocyclotetra(hexa)siloxanes with dihy-droxyorganocyclotetra(hexa)siloxanes in the presence of platinochlorohydric acid of anhydrous powderlike caustic potassium has been studied. High-molecular organosilicon polycyclic copolymers of the bead-like structure with cyclotetra- and cyclohexasiloxane fragments in the chain completely dissoluble in organic solvents were synthesized. Reaction order, activation energies and dehydrocondensation rate constants were found. Thermogravimetric, thermomechanical and X-ray studies of the synthesized polymers were carried out.
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