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

Nadka Tzankova Dintcheva; Sahar Al-Malaika; Elisabetta Morici; Rossella Arrigo

doi:10.1002/app.44974

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

Nadka Tzankova Dintcheva^*, Sahar Al-Malaika, Elisabetta Morici, Rossella Arrigo

^*Corresponding author for this work

Chemical Engineering & Applied Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	44974
Journal	Journal of Applied Polymer Science
Volume	134
Issue number	24
Early online date	20 Feb 2017
DOIs	https://doi.org/10.1002/app.44974
Publication status	Published - 20 Jun 2017

Bibliographical note

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 http://dx.doi.org/10.1002/app.44974. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

Keywords

bio-based nanocomposites
montmorillonite
polylactic acid
thermo-oxidative stability
PLA

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10.1002/app.44974

Thermo-oxidative stabilization of polylactic
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 http://dx.doi.org/10.1002/app.44974. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Accepted author manuscript, 623 KB

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

abstract = "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.",

keywords = "bio-based nanocomposites, montmorillonite, polylactic acid, thermo-oxidative stability, PLA",

author = "Dintcheva, {Nadka Tzankova} and Sahar Al-Malaika and Elisabetta Morici and Rossella Arrigo",

note = "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 http://dx.doi.org/10.1002/app.44974. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.",

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AU - Arrigo, Rossella

N1 - 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 http://dx.doi.org/10.1002/app.44974. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

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N2 - 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.

AB - 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.

KW - bio-based nanocomposites

KW - montmorillonite

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KW - thermo-oxidative stability

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

Abstract

Bibliographical note

Keywords

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