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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Aromatic/Aliphatic Polyester Blends

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Author(s):
Quental, A. C. [1] ; de Carvalho, F. P. [1] ; Rezende, M. L. [2] ; Rosa, D. S. [2] ; Felisberti, M. I. [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Inst Quim, BR-13083900 Campinas, SP - Brazil
[2] Univ Sao Francisco, Programa Pos Grad Engn & Ciencias Mat, BR-13251900 Itatiba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF POLYMERS AND THE ENVIRONMENT; v. 18, n. 3, p. 308-317, SEP 2010.
Web of Science Citations: 0
Abstract

Blends of poly(3-hydroxybutyrate) (PHB) and poly(ethylene terephthalate-co-1,4-cyclohexenedimethanol terephthalate) (PETG) were prepared in a batch mixer and in a twin screw extruder and characterized by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), field emission scanning electron microscopy (FE SEM), flexural tests, biodegradation tests in soil compost and in an enzymatic medium. The torque data showed that the addition of PETG to PHB improved its processability. DSC, DMA and FE SEM showed that the polymers are immiscible with morphology dependent on the processing conditions. A fine dispersion of PETG in the PHB matrix was observed for extruded and injection molded blends. Flexural modulus for blends was higher for blends in comparison with PHB, while the impact resistance of blends containing 20 wt% and 30 wt% of PETG is comparable to the value for PHB. PHB is biodegradable, while PETG did not degrade either in simulated soil or in the alpha-amylase medium. On the other hand, the PHB phase of the blends degrades under these aging conditions. Thus, the addition of PETG to PHB results in advantage such as improving of processability and Young's modulus without significant changes in the impact resistance while keeping the biodegradability of PHB. (AU)

FAPESP's process: 04/15084-6 - Polymeric materials of low environmental impact
Grantee:Marco-Aurelio de Paoli
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 03/09926-1 - Polymeric and ceramic materials
Grantee:Inez Valeria Pagotto Yoshida
Support Opportunities: PRONEX Research - Thematic Grants