| Abstract: | New polyesters were synthesized using Krebs cycle acids. Poly(1, 4-butanediol dilactate succinate)(PBDS) and poly(1, 4-butanediol dilactate 2-acetoxy succinate)(PBDAS) were prepared by the polycondensation of 1, 4-butanediol dilactate with succinic anhydride and 2-acetoxy succinic acid, respectively. Poly(1, 4-butanediol succinate)(PBS) was also synthesized from 1, 4-butanediol and succinic anhydride. PBS/PBDS and PBS/PBDAS blends were prepared by the method of solvent casting. The effects of crystallization time and temperature onto melting behavior of PBS/PBDS and PBS/PBDAS blends were investigated by differential scanning calorimetry. The compatibility of each blend system was discussed using equilibrium melting point depressions. The biodegradation behavior was studied using PBS, PBDS, and PBDAS as the sole carbon source by Aspergillus niger. The molecular weights of the polymers which were obtained from GPC analysis decreased after degradation in five weeks. |
