| abstract |
The present invention discloses a polymer comprising a poly (alkylene-co-dianhydrosugar ester) dicarboxylate, and a process for preparing the polymer by reacting alkylene diols, terephthalic acid and the residues of formula (1).n n n [Formula 1]n n n n n n n n In the above formula,n n n A is an ester moiety derived from anhydrosugar alcohol or dianhydrosugar alcohol,n n n I is an ester moiety derived from a diacid or a dialkyl ester of a diacid,n n n X is H when connected to the A moiety, OH when connected to the I part derived from the dibasic acid, OR is connected to the I part derived from the dialkyl ester of the dibasic acid,n n n R is a C1-C4 straight or branched alkyl group,n n n a and b are independently 0 or 1,n n n n is 1 to 10. |