Thermo-oxidative stabilization of poly(lactic acid)-based nanocomposites through the incorporation of clay with in-built antioxidant activity


In this work, an innovative approach to overcome the issue of the poor thermo-oxidative stability of polymer/clay nanocomposites is proposed. Specifically, biodegradable polylactic acid (PLA)-based nanocomposites, containing organo-modified clay with in-built antioxidant activity, were prepared. Through a two-step chemical protocol, a hindered phenol antioxidant was chemically linked to the ammonium quaternary salt which was then intercalated between the clay platelets [(AO)OM-Mt]. The nanocomposites were characterized and their thermo-oxidative stability during melt processing and under long-term thermal test conditions was investigated. PLA nanocomposites containing the (AO)OM-Mt showed higher oxidative stability, along with better clay dispersion, compared to PLA-nanocomposites containing commercial clay and a free hindered phenol antioxidant. Obtained results can be explained considering that (AO)OM-Mt may act locally, at the interface, between the silicate layers and the polymer macromolecules, thus contributing to the observed improved stability of the polymer both during processing and under long-term thermal-oxidative conditions.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
Additional Information: This is the peer reviewed version of the following article: Dintcheva, N. T., Al-Malaika, S., Morici, E., & Arrigo, R. (2017). Thermo-oxidative stabilization of polylactic acid-based nanocomposites through the incorporation of clay with in-built antioxidant activity. Journal of Applied Polymer Science, Early view., which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords: bio-based nanocomposites,montmorillonite,polylactic acid,thermo-oxidative stability,PLA,Chemistry(all),Surfaces, Coatings and Films,Polymers and Plastics,Materials Chemistry
Publication ISSN: 1097-4628
Last Modified: 04 Mar 2024 08:20
Date Deposited: 19 Aug 2019 10:10
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2017-06-20
Published Online Date: 2017-02-20
Accepted Date: 2017-02-06
Submitted Date: 2016-12-20
Authors: Dintcheva, Nadka Tzankova
Al-Malaika, Sahar (ORCID Profile 0000-0002-1378-0603)
Morici, Elisabetta
Arrigo, Rossella



Version: Accepted Version

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