Polymer monomer used for stable blue phase liquid crystal and synthesis method

The present invention discloses a polymer monomer used for stable blue phase liquid crystal and a synthesis method therefor. By the polymer monomer, a polymer stable blue phase kerr coefficient can be increased. The general structural formula of the liquid crystal monomer compound is as shown in the specification, wherein A is isosorbide or R-binaphthyl phenol, B is benzene ring or cyclohexane, the value of m is 1 or 2, and the value of n is 1-3. Compared with the conventional olefinic bond of a polymer stable blue phase liquid crystal polymer monomer end group, the polymer monomer has the features that double olefinic bonds are introduced, polymerization performance is better, the raw materials are easy to obtain, the synthesis routine is simple, and the polymer monomer is suitable for large-scale production.