Morphological and Thermal Characteristics of PLA/PHA/PBAT Ternary Blends
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초록
내용
The growing issue of plastic waste has increased the demand for biodegradable plastics such as poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT). While blending these materials can enhance their properties, PLA/PBAT blends often exhibit poor compatibility, resulting in a sea-island morphology and increased fracture susceptibility. To mitigate this, poly(hydroxyalkanoates) (PHA) was introduced as a compatibilizer in the PLA/PBAT blend, improving the morphological, thermal, and mechanical properties. This study examined various ratios of PLA/PHA/PBAT blends, using diffusion coefficients to predict morphology and SEM to verify the interfaces. Results showed that PHA encapsulates PBAT, stabilizing the interface and increasing impact strength. By increasing the proportion of biomass-derived PHA, this approach also leads to more sustainable and eco-friendly plastic materials, potentially reducing carbon emissions.