Compatibility of biodegradable poly (lactic acid) (PLA) and poly (butylene succinate) (PBS) blends for packaging application

摘要: Biodegradable polymeric blends are expected to be widely used by industry due their environmental friendliness and comparable mechanical thermal properties. Poly (lactic acid) (PLA) poly (butylene succinate) (PBS) such biodegradable polymers which aim replace commodity in future applications. Since cost brittleness of PLA is quite high, it not economically feasible use alone for day as a packaging material without blending. In this study, PBS with various compositions were prepared using laboratory-scale twin-screw extruder at 180oC. Morphological, thermal, rheological properties investigated on the samples obtained compression molding explore suitability these Morphology was scanning electron microscopy (SEM). showed clear phase difference trend depending blend composition. Modulated differential calorimetry (MDSC) thermograms indicated that glass transition temperature ( ) did change much addition PBS, but analysis PLA/PBS up 80/20 composition there partial miscibility between two polymers. The tensile strength modulus measured Instron Universal Testing Machine. Tensile strength, percentage (%) elongation break decreased content. However, values nearly follow mixing rule. Rheological results also show less than 20% weight. reduced PLA, thus making contender plastics This work found investigating morphological