A series of aliphatic biodegradable poly (butylene succinate-block-butylene sebacate) (PBSuBSe) copolyesters were synthesized by incorporation of PBSe into the PBSu molecular chains. The molecular weight, crystallization behaviors and the crystal structure of the copolyesters were investigated by using gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXD), respectively. The copolyesters might be potentially useful as the biodegradable materials.

This study synthesizes a series of aliphatic biodegradable poly (butylene succinate-block-1,3-propylene sebacate) (PBS-b-PPS) copolyesters by incorporation of PPS into the PBS molecular chains at various molar ratios. The effects of these compositions on the thermal properties, crystallinity and biodegradability were investigated.The PBS-b-PPS were characterized using 1H NMR, DSC and POM.Biodegradability was evaluated by enzymatic hydrolysis with a lipase from Pseudomonas cepacia. The copolyesters might be potentially useful as the biodegradable materials.