Branched Copolymer Based on Glycerol, Ethylene Glycol and Adipic Acid, Linear Copolymer Based on Lactic Acid, Ethylene Glycol and Succinic Acid: Thermal and Microbial Degradation Comparatives Studies

In this work, we aim compare the thermal and microbial degradation of two copolyesters a Branched copolyester Based on Glycerol, Ethylene Glycol and Adipic acid COP B [27] and a linear copolyester based on Lactic Acid, Ethylene Glycol and Succinic Acid COP L [2]. The quantitative and qualitative biodegradation phenomenon of the prepared copolyesters studied using two selected strains of Aspergillus sp S1 and Penicillium sp S2. The mechanism illustrating this process was proposed. The mean of the apparent activation energy (Ea) of COP L is biggest than noted for COP B. In case of the biomass growth obtained for Aspergillus sp S2 and Penicillium sp S1 a high increase of biomass was observed for COP B. The branched biodegradable copolyester exhibit potential to replace linear biodegradable copolyester.