ORGANOSILICON COPOLYMERS WITH CARBOTRICYCLODECASILOXANE FRAGMENTS IN THE DIMETHYLSILOXANE CHAIN

The reaction of stage heterofunctional condensation of tetrahydroxy-1, 3,5,7-tetraphenylcyclotetrasiloxane (tetrol) with 1,3-dichlortetrameth yldisiloxane 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 o f pyridin and 1,3-divynil-1,3,9,9,11,11-hexamethyl-5,7,13, has been ob tained. The reaction of hydrid polyaddition of alpha,omega-dihydriddim ethylsiloxanes to amethyl-5,7,13,15-tetraphenyltricyclodecasiloxanes i n the presence of platinochlorohydric acid and acetylacetonatdicarbony l rodium catalyst has been studied. The reaction order, activation ene rgies and hydrid poly addition rate constants have been found. It has been established that with an increase of the length (n) of the alpha, omega-dihydriddimethylsiloxanes the degree of hydrid polyaddition is r educed. It was shown that in the case of acetylacetonatdicarbonyl rodi um the obtained copolymers are structured. Thermogravimetric, thermome chanical and X-ray studies of the synthesized copolymers have been car ried out.