Preparation of Polydecalactone-Grafted Microcrystalline Cellulose for Toughening Fully Bio-Based PLLA Composite Materials
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초록
내용
In this study, we designed novel methods to prepare a fully bio-based thermoplastic poly(l-lactide) (PLLA) composites with improved mechanical properties based on the new approaches of utilization of alkyl-branched microcrystalline cellulose (MCC). To control the dispersibility and interfacial interactions of MCCs, we grafted the MCC with poly(ε-decalactone) via ring-opening polymerization (ROP) of ε-decalactone (ε-DL), resulting in cellulose graft copolymeric (Cell-g-PDL) filler. The mixing ratio was controlled by varying the amount of filler from 5 wt% to 20 wt% relative to that of matrix. As the contents of Cell-g-PDL increased, it was found that the PLLA composites displayed an unnoticed decrease in strength with gradually increased elongation as compared to PLLA. With increasing the Cell-g-PDL composition, the more toughened composites were fabricated. This result was thought to be a marked increase in toughness induced by the action of rigid cellulose and PDL graft chain.