| 초록 |
In recent decades, cellulose nanofibrils (CNF) have been extensively studied as potential natural reinforcing fillers in environmentally-friendly polymer composites due to their lightweight, non-toxic, and biodegradability. However, owing to their hydrophilicity, CNFs are relatively poor in dispersion in most commercially available hydrophobic polymeric materials such as polyolefins. To obtain CNF-reinforced polyolefin composites with enhanced thermal and mechanical properties through improved interfacial adhesion and dispersion, glycidyl methacrylate-grafted polypropylene (PPGMA) was prepared via reactive melt-mixing and was compounded with CNFs in various proportions. The molecular interaction and dispersion of CNF/PPGMA composites were characterized by using FT-IR, SEM, EDS, and XRD. The thermal and mechanical properties of the composites were measured using DSC, TGA, DMA, and Izod impact tester, and the results were analyzed considering the CNF content and molecular interactions. |
