Polycondensation of diethyl adipate, 1,4butanediol, and dilinoleic diol in the presence of CAL-B was conducted in diphenyl ether and in bulk. The impact of the polymerization method was assessed in terms of E-factor, copolymer chemical structure, composition, yield by weight (%), number, and weight averaged molecular weight (Mn and Mw, respectively), as well as thermal and thermomechanical properties.