The crystallization, mechanical and biodegradation properties of poly(lactic acid)/natural rub-ber/cellulose nanocrystals (CNC) bionanocomposites were evaluated. Three types of CNC were used in thisstudy, one unmodified (CNC), long alkyl chain grafted CNC (C18-g-CNC) and PLA grafted CNC (PLA-g-CNC).The CNC modifications determined the affinity of the nanocrystals toward the polymers and reflectedon the ultimate properties. Interestingly, PLA-g-CNC acted as a nucleating agent for the PLA matrixin the bio-based PLA/NR blend. Good mechanical properties were reported, as the bionanocompositesmaintained a high elongation at break for a concentration up to 3 wt.% of cellulose nanocrystals. More-over, the disintegration study confirmed that the materials completely disintegrated after one month incompost.
Poly(lactic acid)/Natural rubber/Cellulose nanocrystal bionanocomposites Part II. Properties evaluation.
FORTUNATI, ELENA;KENNY, Jose Maria;TORRE, Luigi;
2013
Abstract
The crystallization, mechanical and biodegradation properties of poly(lactic acid)/natural rub-ber/cellulose nanocrystals (CNC) bionanocomposites were evaluated. Three types of CNC were used in thisstudy, one unmodified (CNC), long alkyl chain grafted CNC (C18-g-CNC) and PLA grafted CNC (PLA-g-CNC).The CNC modifications determined the affinity of the nanocrystals toward the polymers and reflectedon the ultimate properties. Interestingly, PLA-g-CNC acted as a nucleating agent for the PLA matrixin the bio-based PLA/NR blend. Good mechanical properties were reported, as the bionanocompositesmaintained a high elongation at break for a concentration up to 3 wt.% of cellulose nanocrystals. More-over, the disintegration study confirmed that the materials completely disintegrated after one month incompost.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
