Structure-Property Relationship of Green Nanocomposites Based on Glycidyl Methacrylate-grafted Polylactide and Cellulose Nanofibrils
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초록
내용
Polylactide (PLA) has gained commercial importance due to renewability, biodegradability, and excellent thermo-mechanical properties. But PLA has some disadvantages such as slow crystallization rate, brittleness, low heat distortion temperature. Cellulose nanofibrils (CNF) emerge as a renewable and sustainable feedstock for bio-based materials with good mechanical properties. When CNF is dispersed within non-polar polymers such as PLA, they tend to bundle together due to the intermolecular hydrogen bonding between adjacent CNF chains. In this study, to improve the compatibility of PLA and CNF, glycidyl methacrylate (GMA) was grafted onto PLA. Then PLA-g-GMA was melt-compounded with CNF to improve its physical properties. The microstructure and morphology of PLA-g-GMA nanocomposites reinforced with CNF were characterized using FT-IR and SEM. The thermal transition, thermal stability, mechanical, and rheological properties were analyzed using DSC, TGA, DMA, and rheometer, respectively.