Journal
POLYMER TESTING
Volume 51, Issue -, Pages 109-116Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2016.03.005
Keywords
Thermal stability; Poly(lactic acid); Shear; B900 stabilizer; Molecular weight
Funding
- Programa Operacional Regional do Norte [(ON.2), PEst-C/CTM/LA0025/2013 (Strategic Project - LA 25 - 2013-2014), PEST-C/QUI/UIO686/2013]
- NMR Portuguese network (PTNMR, Brucker Avance III 400-Univ. Minho)
- FAPESP [2010/07651-9]
- CNPq [304902/2012-8]
- Fundação para a Ciência e a Tecnologia [PEst-C/CTM/LA0025/2013] Funding Source: FCT
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [10/07651-9] Funding Source: FAPESP
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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.
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