Understanding the Microstructure-Rheology Connection in PBS/PBATBiodegradable Blends: Implications for Energy Dissipation and Storage

This study investigates the potential of blends formed by two biodegradable polyesters,Poly(Butylene Succinate) (PBS) and Poly(Butylene Adipate-co-Butylene Terephthalate) (PBAT), assubstitutes for conventional plastics. The polyesters were first melt blended in an internal mixer,followed by analysis of the resulting blend's flow behavior using parallel plate rheometer. Notably,the data revealed phase separation coinciding with the observed phase inversion due to the PBS'snetwork formation in PBS/PBAT (۴۵:۵۵) blend. This separation phenomenon leads to elasticbehavior at low frequencies, enhancing the material's reversible strain under these conditions. Priorto phase inversion, the mixture exhibits relative homogeneity, likely due to a transesterificationreaction. This reaction plays a crucial role in influencing the diverse properties of these polyesterblends. These findings contribute significantly to understanding the connection between themicrostructure and rheological properties of biodegradable plastic blends, ultimately paving the wayfor their development as viable alternatives to oil-based commercial plastics.

کلیدواژه ها:

Biopolymers ، Polymer Blend ، Structure-Rheology Correlation ، Poly (ButyleneSuccinate) ، Poly (Butylene Adipate-co-Butylene Terephthalate)