Journal
CARBOHYDRATE POLYMERS
Volume 90, Issue 4, Pages 1452-1460Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.07.015
Keywords
Biodegradable films; Extrusion blow molding; Blends; Surfactant; Lipids
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Funding
- Brazilian Federal Agency
- Evaluation of Graduate Education (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - CAPES)
- Council for Scientific and Technological Development (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq)
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Starch extruded in the presence of a plasticizer results in a material called thermoplastic starch (TPS). TPS mixed with poly(butylene adipate co-terephthalate) (PBAT), soybean oil (SO), and surfactant may result in films with improved mechanical properties due to greater hydrophobicity and compatibility among the polymers. This study characterized films produced from blends containing 65% TPS and 35% PBAT with SO added as compatibilizer. The Tween 80 was added to prevention of phase separation. The elongation and resistance were greater in the films with SO. The infrared spectra confirmed an increase in ester groups bonded to the PBAT and the presence of groups bonded to the starch ring, indicating TPS-SO and PBAT-SO interactions. The micrographs suggest that the films with SO were more homogenous. Thus, SO is considered to be a good compatibilizer for blends of TPS and PRAT. (C) 2012 Elsevier Ltd. All rights reserved.
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