Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies

Reprocessability of PHB in extrusion: ATR-FTIR, tensile tests and thermal studies

Author Rivas, Leonardo Fabio Google Scholar
Casarin, Suzan Aline Google Scholar
Nepomuceno, Neymara Cavalcante Google Scholar
Alencar, Marie Isabele Google Scholar
Marcondes Agnelli, Jose Augusto Google Scholar
de Medeiros, Eliton Souto Google Scholar
Wanderley Neto, Alcides de Oliveira Google Scholar
de Oliveira, Mauricio Pinheiro Autor UNIFESP Google Scholar
de Medeiros, Antonio Marcos Google Scholar
Ferreira e Santos, Amelia Severino Google Scholar
Abstract Mechanical recycling of biodegradable plastics has to be encouraged, since the consumption of energy and raw materials can be reduced towards a sustainable development in plastics materials. In this study, the evolution of thermal and mechanical properties, as well as structural changes of poly(hydroxybutyrate) (PHB) up to three extrusion cycles were investigated. Results indicated a significant reduction in mechanical properties already at the second extrusion cycle, with a reduction above 50% in the third cycle. An increase in the crystallinity index was observed due to chemicrystallization process during degradation by chain scission. On the other hand, significant changes in the chemical structure or in thermal stability of PHB cannot be detected by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analyses (TGA), respectively.
Keywords biopolymer
degradation
PHB
recycling
reprocessing
xmlui.dri2xhtml.METS-1.0.item-coverage Sao Carlos
Language English
Sponsor National Foundation for Science and Technology Development (CNPq)
Date 2017
Published in Polimeros-Ciencia E Tecnologia. Sao Carlos, v. 27, n. 2, p. 122-128, 2017.
ISSN 0104-1428 (Sherpa/Romeo, impact factor)
Publisher Assoc Brasil Polimeros
Extent 122-128
Origin http://dx.doi.org/10.1590/0104-1428.2406
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000407389300005
SciELO ID S0104-14282017000200122 (statistics in SciELO)
URI https://repositorio.unifesp.br/handle/11600/54765

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