| abstract |
PROBLEM TO BE SOLVED: To produce a cyclic ester-modified cellulose derivative which is advantageous for industrial practice such as good stirring, easy removal from a reactor and a high reaction rate until the end of the reaction. Provide a way. SOLUTION: When a cyclic ester is subjected to ring-opening graft polymerization to a cellulose derivative having a hydroxyl group in the presence of a ring-opening polymerization catalyst to produce a cyclic ester-modified cellulose derivative, polymerization is performed in a cyclohexanone or γ-butyrolactone solvent. I do. |