Polyethylene glycol-400(PEG-400)grafted in polystyrene-divinyl benzene(PS) supporter as macromolecule ligand was synthesized.The effects of such factors as temperature，time and solvent etc are also studied

and the structure of the ligand was characterized by IR spectrum.Polystyrene-supported PEG-400 molybdenum(Ⅵ) dioxo(2

4-pentanedione)［PS-PEG-MoO2(acac)］ used as epoxidation catalysis species

was for the first time synthesized by the phase transfer catalysis method

and was characterized by infrared spectrum technique.The affecting factors on the synthesis process of PS-PEG-MoO2(acac)were also discussed.Epoxycyclohexane synthesized by the reaction of cyclohexene and t-butyl hydroperoxide(t-BuOOH)with PS-PEG-MoO2(acac) as catalyst was investigated in the presence of nitrogen.The analysis method of Mo in the catalyst and the gas chromatogram (GC) method of epoxycyclohexane analysis were set up.The optimum reaction condition was obtained by orthogonal experiment design

that is

according to n(t-BuOOH)=0.1mol

n(cyclohexene)∶n(t-BuOOH)=3∶1

volume of solvent is about 5ml

reaction temperature～80℃

time～60min，and mass of molybdenum in the catalyst is～0.0198g.Under this condition

the yield of epoxycyclohexane calculated by the amount of t-BuOOH is more than 99.5%

the purity of epoxycyclohexan is about 99.5% by GC analysis.