Mechanochemical synthesis of polyalumodiphenylsiloxanes

The purpose of the presented work was to study the possibility of mechanochemical synthesis of polyaluminomodiphenylsiloxanes. For the first time, diphenylsilanediol and tributoxyaluminium were used for synthesis under conditions of mechanical activation. It was found that alumodiphenylsiloxanes with a Si/Al ratio close to the set one are formed, and an increase in the activation time leads to an increase in the rate of homocondensation of the initial diphenylsilanediol and, as a result, an increase in the Si/Al ratio. Using IR- and NMR-spectroscopy, it was found that the aluminum atom forms a polymer aluminosiloxane chain with silanediol, in which butoxyl groups are preserved. It is shown that the obtained compounds have significantly lower thermal stability than spatially branched organometallic siloxanes. The compounds obtained in the work are characterized by modern methods of analysis.