Effect of Blend Composition on PBAT/PLA Biodegradable Polymers
발표자
이나원 (경북대학교)
연구책임자
이동윤 (경북대학교)
공동저자
이나원 (경북대학교), 이동윤 (경북대학교)
초록
내용
This study examines the effects of composition on the mechanical and thermal properties of biodegradable poly(butylene adipate-co-terephthalate) (PBAT) and polylactic acid (PLA) blends. PBAT/PLA specimens with different blend ratios were prepared and analyzed using tensile testing (UTM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical analysis (DMA). Increasing PBAT content improved elongation at break and viscoelastic behavior, while increasing PLA content enhance tensile strength and modulus but caused brittle fracture. Thermal analysis showed stable glass transition and melting temperatures, whereas crystallinity and thermal stability decreased with increasing PLA content. DMA results confirmed a transition from ductile to stiffness-dominated behavior with higher PLA content. These findings demonstrate that PBAT/PLA properties can be tailored through compositional control, providing guidelines for biodegradable polymer design.