Organosilicon Copolymers with Carbotricyclodecasiloxane Fragments in the Dimethylsiloxane Chain

The reaction of stage heterofunctional condensation of cis-1,3,5,7-tetrahydroxy-1,3,5,7-tetraphenylcyclo-tetrasiloxane (tetrol) with 1,3-dichlortetramethyldisiloxane and 1,3-dichlor-1,3-dimethyl-1,3-divinyldisiloxane by the ratio of initial products of 1:1:1 has been studied in the presence of pyridin and 1,3-divynil-1,3,9,9,11,11-hexamethyl-5,7,13,15-tetraphenyltricyclodecasiloxanehas been obtained. The reaction of hydrid polyaddition of α,ω-dihydriddimethylsiloxanes to 1,3-divinyl-1,3,9,9,11,11-hexamethyl-5,7,13,15- tetraphenyltricyclodecasiloxanes in the presence of platinochlorohydric acid and acetylacetonatdicarbonyl rodium catalyst has been studied. The reaction order, activation energies and hydrid polyaddition rate constants have been found. It has been established that with an increase of the length (n) of the α,ω-dihydriddimethylsiloxanes the degree of hydrid polyaddition is reduced. It was shown that in the case of acetylacetonatdicarbonyl rodium the obtained copolymers are structured. Thermogravimetric, thermomechanical and X-ray studies of the synthesized copolymers have been carried out.