• Nichakorn Pathumrangsan


Branch structure, Blended Polylactide, Polylactide; Polyglycidol


Hyperbranched poly(L-lactide)(hb-PLLA)s for green environment  were synthesized by ring-opening polymerization of L-lactide (LLA) using polyglycidol (PG) as an initiator. hb-PLLAs  were blended with linear PLLA (l-PLLA) by varying the LLA branch content. Thermal, Mechanical and rheological properties, and optical transparency of hb-PLLAs and their blends with l-PLLA were investigated. All l-PLLA/hb-PLLAs blends showed slightly changes of Tg values, whereas the Tm  was significantly unchanged. A single Tgis was observed in all blends, indicating a completely miscible system. All blends exhibited an increase in crystallinity, as the branch structure acted as nucleating agent for crystallization of l-PLLA. Viscosity of the blends was decreased with the addition of l-PLLA. This provides easy processing conditions. The blends also showed high optical transparency, comparable to neat l-PLLA. Given these properties and their biocompatibility, the blends can be used in biomedical applications.


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บทความวิจัย (Research Article)