Dendrimers/Hyperbranched/Star Polymers

摘要

Hyperbranched polysiloxysilanes from monomers of type A2(dimemylbis(dimethylsiloxy)siloxane and tetramethyldisiloxane),and B'B_X(methylvinyldiallylsilane and vinyl triallylsilane),are produced via hydrosilylation.The process comprises two stages,1)silicon hydride selectively reacts with vinylsilane groups,which produces intermediate structures with one Si-H and two(or three)allyl groups which perform as monomers of type AB2 or AB3,respectively,and 2)the monomers self-polymerise to give hyperbranched polymers.