The invention provides dianhydride
monomer containing photocrosslinkable phenyl vinyl
ketone element and a preparation method thereof, belonging to the technical field of a
macromolecule material. The middle of the
monomer structural formula contains the phenyl vinyl
ketone element which can generate photocrosslinking reaction under UV-
irradiation, two sides of the phenyl vinyl
ketone element do not contain or contain 2-6 -CH2- linear-chain flexible chains, and the ends of the phenyl vinyl ketone element are 2 aromatic anhydrides. In the preparation method, phenyl vinyl ketone containing 2 Ph-OH is obtained by
aldol condensation, phenyl vinyl ketone containing 2 alcoholic hydroxy and 2 flexible chains is further obtained by O-
alkylation, and the obtained phenyl vinyl ketone containing hydroxyl and
trimellitic anhydride acyl chloride are esterified and purified to obtain the dianhydride
monomer containing the phenyl vinyl ketone which meets the polycondensation purity requirement. The raw materials used in the preparation method are large-scale industrialization products, the control of the synthetic process is simple, and the obtained dianhydride has higher purity, thereby further meeting requirements for
polyimide polymerization production.