Green Composites from Natural Resources

31Valorization of Agricultural By-Products in Poly(Lactic Acid)

decomposition (lignin). After 500°C, char oxidation occurred with a char amount of

around 25%. The same decomposition mechanisms were reported in the literature

(Tserki et al. 2005) for olive husk our.

2.2.2.3 Biocomposite Properties

2.2.2.3.1 Thermal Properties

DSC experiments (Perkin-Elmer, Pyris Diamond, 10°C/min, nitrogen) are investi-

gated rst to study the thermal behavior of PLA/olive pit powder biocomposites

(Table2.3). An increase in the crystallinity ratio (+4%–8%) with the presence of

Temperature (°C)

Weight (mg) %

30

60

90

200

22%

23%

5%

29%

25%

400 600

FIGURE 2.15 TGA curves o ...