A versatile method for preparing linear, unsaturated polyesters through condensation polymerization of trans-beta-hydromuconic acid (HMA) with a variety of diols using Sn(Oct)(2) and Novozyme-435 as catalysts was explored. Poly(1,8-octanediol hydromuconoate) was the highest molecular weight homopolymer prepared with a < M-n > of 10.5 x 10(3) g/mol and polydispersity of 2.0. These materials showed unique melting behavior that was dependent on the number of carbons in the diol. Melting points ranged from 40 to 70 degrees C. Copolymers where the amount of HMA was diluted by adipic acid were prepared and had a < M-n > as high as 13.0 x 10(3) g/mol and polydispersities below 2.0. The double bonds of these materials were chemically modified through epoxidation in yields greater than 93% and with no degradation of the polymer backbone. Materials with hydroxyl end groups were prepared through stoichiometric mismatch. Unsaturated poly(ester ether)s that are amorphous liquids with T-g below -40 degrees C were prepared using diethylene glycol as the diol.