Journal
QUIMICA NOVA
Volume 34, Issue 9, Pages 1507-U366Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422011000900005
Keywords
starch; polyester; compatibilization
Categories
Funding
- CAPES
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Citric acid was used as a compatibilizer in the production of starch and PBAT films plasticized with glycerol and processed by blow extrusion. Films produced were characterized by WVP, mechanical properties, FT-IR-ATR and SEM. WPV ranged from 3.71 to 12.73x10(-11) g m(-1) s(-1) Pa-1, while tensile strength and elongation at break ranged from 1.81 to 7.15 MPa and from 8.61 to 23.63%, respectively. Increasing the citric acid concentration improved WVP and slightly decreased film resistance and elongation. The films micrographs revealed a more homogeneous material with the addition of citric acid. However, the infrared spectra revealed little about cross-linking esterification reaction.
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