Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Starch plasticized with glycerol from biodiesel and polypropylene blends

Full text
Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 102, n. 1, p. 181-186, OCT 2010.
Web of Science Citations: 22
Abstract

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)