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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Starch plasticized with glycerol from biodiesel and polypropylene blends

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Autor(es):
Rosa, D. S. [1] ; Bardi, M. A. G. [1] ; Machado, L. D. B. [2] ; Dias, D. B. [2] ; Silva, L. G. A. [2] ; Kodama, Y. [2]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Francisco, Programa Posgrad Stricto Sensu Engn Ciencia Mat P, Lab Polimeros Biodegradaveis & Solucoes Ambientai, BR-13251900 Itatiba, SP - Brazil
[2] IPEN CNEN SP, Ctr Tecnol Radiacoes, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 102, n. 1, p. 181-186, OCT 2010.
Citações Web of Science: 26
Resumo

Plastics have been used in short-life products, which have presented harmful consequences for the nature, due to the low degradation rate reached by the most common polyolefins, such as the polypropylene. By this way, the incorporation of pro-oxidants has been shown nice results to the bio-assimilation of the common polymers. The aim of this study is to evaluate the mechanical and thermal properties of pure iPP, plasticized starch (TPS) with biodiesel glycerol (TPS(Bio)) or commercial glycerol (TPS(Com)), and their blends (iPP/TPS(Plas)). TPS was plasticized in proportions of 80/20 (wt starch/wt glycerin). Blends of iPP/TPS(Plas) were obtained by extrusion in the following composition rates: 95/5, 90/10, 80/20, and 70/30 of modified PP/TPS(Plas). Mechanical properties, calorimetric analysis, and thermogravimetric data were obtained, and biodegradation under simulated soil was performed. It can be verified that there were no meaningful variation induced by the incorporation of TPS(Plas) on the melting temperature on the blends, when compared to pure iPP. The addition of TPS(Plas) caused an increasing on the crystallinity of iPP, mainly for the compositions 90/10 and 80/20 of iPP/TPS(Plas), probably due a morphological alteration such as crosslinking, which may have modified the molecular arrangement of the iPP macromolecules by the presence of glycerol, which was also indicated by mechanical evaluations. (AU)

Processo FAPESP: 04/13359-8 - Avaliação do efeito de aditivos pró-oxidantes em blendas de polipropileno e amido plastificado
Beneficiário:Marcelo Augusto Gonçalves Bardi
Linha de fomento: Bolsas no Brasil - Iniciação Científica