New monomer

4-undecylen-[10]-amidoazobenzene was prepared.New polymer

poly(methyl

undecanoic amidoazobenzene-siloxane)was synthesized by hydrosilation reaction of poly(methylhydrosiloxane)with monomer.The chemical structure of monomer and polymer was confirmed by IR and 1H-NMR analysis.The linear dependence of Ar on time in photoisomerization reaction of azobenzene groups of polymer and monomer in benzene solution are in accordence with a first kinetics.km and kp are3.011×10-7·s-1 and 4.350×10-8·s-1

respectively. These results indicate that the macromolecular stucture does not significantly affect the photoisomerization rate

therefore the polymer shows both good mechnical properties stemming form polysiloxane and photochromism stemming form monomer. The quantum yield fo photoisomerization of monomer in benzene solution is 0.37.