Structure-Mobility Relationship in kraft lignin-modified Poly(butylene succinate-co-terephthalate)
발표자
박태경 (충남대학교)
연구책임자
구준모 (충남대학교)
공동저자
구준모 (충남대학교), 박태경 (충남대학교)
초록
내용
Controlling polymer chain mobility, which governs the glass transition temperature (Tg), remains a key challenge in designing biodegradable polyesters with balanced thermal and mechanical performance. Conventional approaches often rely on compositional modification or post-blending, offering limited control over chain dynamics.
In this work, kraft lignin was introduced as a biomass-based rigid aromatic component to modulate chain mobility in poly(butylene succinate-co-terephthalate) (PBST), yielding PBST and PBST–kraft lignin composites via in-situ polymerization. The presence of kraft lignin restricted segmental motion of PBST chains through structural constraints arising from its rigid aromatic nature and intermolecular interactions. This study provides insight into structure–mobility relationships in kraft lignin-containing biodegradable polyesters and suggests a molecularly informed approach for tuning thermal and mechanical properties.