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Enhancement of the thermal resistance of poly(lactic acid) obtained by reactive extrusion by adding nanoclays

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Carrasco Alonso, Félix ÁngelMés informació
Maspoch Rulduà, Mª LluïsaMés informacióMés informacióMés informació
Document typeArticle
Defense date2016-10-01
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
In the present work, poly(lactic acid) sheets (with a nominal width of 1 mm) reinforced with organically modified montmorillonite (with a mass content of 2.5%) have been manufactured through a reactive extrusion process. A chain extensor (with a mass content of 0.5%) has been used in order to improve poly(lactic acid) properties. The kinetics of the thermal degradation has been analyzed by means of the general analytical equation. Various empirical and theoretical solid-state mechanisms have been tested to elucidate the best kinetic model. In order to reach this goal, master plots have been constructed by means of standardized conversion functions. Given that it is not always easy to visualize the best accordance between experimental and theoretical values of standardized conversion functions, a new index, based on integral mean errors, has been developed to quantitatively discern the best mechanism. By doing that, it has been possible to ascertain that random scission of macromolecular chains was the best kinetic model. The presence of nanoparticles has been beneficial, thus enhancing the thermal resistance of poly(lactic acid).
CitationCarrasco, F., Maspoch, M. Enhancement of the thermal resistance of poly(lactic acid) obtained by reactive extrusion by adding nanoclays. "Afinidad: revista de química teórica y aplicada", 1 Octubre 2016, vol. 73, núm. 576, p. 251-258. 
URIhttp://hdl.handle.net/2117/104066
ISSN0001-9704
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  • Departament de Ciència dels Materials i Enginyeria Metal·lúrgica - Articles de revista [961]
  • POLY2 - Polyfunctional polymeric materials - Articles de revista [99]
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