The role of shear and stabilizer on PLA degradation

Author(s)

Oliveira, Manuel ^[1] ; Santos, Elsa ^{[1, 2]} ; Araujo, Andreia ^[1] ; Fechine, Guilhermino J. M. ^[3] ; Machado, Ana V. ^[1] ; Botelho, Gabriela ^[2]

Affiliation

^[1] Univ Minho, Inst Polymers & Composites I3N, Campus Azurem, P-4800058 Guimaraes - Portugal

^[2] Univ Minho, Ctr Dept Chem, Campus Gualtar, P-4710057 Braga - Portugal

^[3] Univ Prebiteriana Mackenzie, Graphene & Nanomat Res Ctr Mackgraphe, Sao Paulo - Brazil

• Document type: Journal article
• Source: Polymer Testing; v. 51, p. 109-116, MAY 2016.
• Web of Science Citations: 14

Abstract

The role of temperature, shear and oxygen on PLA degradation was investigated. Thermo-mechanical degradation induces a larger decrease in PLA molecular weight than thermo-oxidative degradation. This was associated with different degradation processes (mainly chain scission) that took place under the two conditions. Given the PLA robustness to endure reprocessing, it was possible to conclude that the primary and secondary antioxidant (B900) had a synergetic effect on PLA stability. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 10/07651-9 - Degradation and stabilization of biodegradable polymeric blends and composites
• Grantee: Guilhermino José Macêdo Fechine
• Support Opportunities: Regular Research Grants