| 초록 |
Although biodegradable plastics are continuously emerging as a solution to relieve the burgeoning plastic pollution, the performance is currently insufficient for commercialization. Herein, we report biodegradable nanocomposites composed of poly(butylene succinate) (PBS) and cellulose nanocrystals (CNCs) and suggest a rheological strategy to tailor their performances. Depending on measurement frequencies, the rheological results revealed two percolation thresholds at approximately 0.8 and 1.5 wt%. At high frequencies, the disappearance of the 1st threshold (0.8 wt%) and the sole persistence of the 2nd one (1.5 wt%) indicated the breakdown of the imperfect network of CNCs. The tensile and hydrolytic properties were found to undergo drastic changes at the thresholds. However, the reinforcing efficiency of CNC decreases sharply with further incorporation. On the other hand, hydrolytic degradation of the nanocomposites was rapidly accelerated above 1.5 wt% CNC loading. |
