Regioselectively substituted cellulose benzoate propionates for compensation film in optical displays

Cellulose benzoate propionates (CBzP) were prepared via a staged addition of Pr₂O followed by Bz₂O to cellulose dissolved in tributylmethylammonium dimethyl phosphate (TBMADMP) providing regioselectively substituted cellulose esters in which the benzoate was preferentially installed at C2 and C3. By systematically varying the DS_Pr, DS_Bz, and DS_OH (DS = degree of substitution), we synthesized CBzP that could potentially be utilized as a unique compensation film in optical displays.