Estudo das propriedades termomecanicas e morfologicas de blendas biodegradaveis de poli (epsilon-caprolactona) (PCL) com amido de milho natural e modificado, plastificada com alquil epoxi estearato, com e sem po de fibra de coco / Study of the thermo-mechanical and morphological properties of biodegradable blends based on poly (epsilon-caprolactone)/corn starch plasticized with alquil-epoxy sterate, with and without coconut powder fiber

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The mechanical properties of PCL (Polycaprolactone) blend with natural and modified starch (Adipic acid derivative), in the presence of a plasticizer like Alquil Epoxi Stearate, a totally biodegradable product, were studied in this dissertation. The necessity to develop biodegradable polymeric compositions with good mechanical properties, but with competitive cost, was the objective of this study where modified starch was incorporated to the PCL matrix to turn the final product commercially viable. Were prepared blends with 30 to 50% of PCL and 50 to 70% of a mix of Adipic acid modified starch and Edenol 3203 (70/30% w/w). These blends were mixed in a Dry blend system and processed in single and double screw extruder, in order to study the influence of processing in the final properties of the products. The best result, regarding to the mechanical properties, were obtained with the blend PCL/Starch adipic modified/Edenol 3203 w/w %(50:35:15), which was studied in details by Scanning Electron Microscopy (SEM), Differential canning alorimetry (DSC), X-ray analysis and Gel Permeation Chromatography (GPC). We also studies the incorporation of coconut powder, obtained from coconut fiber, into the blend PCL/Adipic acid modified starch /Edenol 3203 w/w %(50:35:15) to investigate the possibility to obtain a more resistant material with a higher rate of biodegradation. The results, however, showed blends with poor mechanical properties compared with blends without coconut fiber

ASSUNTO(S)

amidos polimeros - biodegradação biodegradable blends polymers poli (epsilon-caprolactona) polimeros starch alquil epoxy sterate

ACESSO AO ARTIGO

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