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The effect of anionic clay particles on the structure and thermomechanical behavior of sodium partially-neutralized EMAA ionomer
Ardanuy Raso, Mònica; Velasco Perero, José Ignacio; Rodríguez-Pérez, Miguel Ángel; Saja, José Antonio de
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia
Electronic version of an article published as "Journal of Applied Polymer Science", Vol. 116, issue 5, p.2573–2579 (2010)
Nanocomposites based on a sodium partially-neutralized ionomer of poly (ethylene-comethacrylic acid) (EMAA) and MgAl layered double hydroxide (LDH) particles with and without organic modification were prepared from a melt mixing process. The structure was characterized using X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). Although TEM micrographies revealed the presence of agglomerates of LDH sheets, the achievement of an exfoliated structure was observed when dodecyl sulphate-modified LDH particles were used. The effects of the LDH particles on the thermomechanical properties of EMAA were analyzed using differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). The thermal transition of the ionic aggregates and dynamic mechanical response of EMAA were found strongly modified by these particles, resulting in an increase on the storage modulus and a decrease on the loss factor values. Moreover, the alpha relaxation of the composites was visibly shifted to higher temperatures
Àrees temàtiques de la UPC::Enginyeria química::Indústria dels processos químics
Layered double hydroxides
Ionomers
Productes químics
Compostos tensoactius
Tensoactius
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Article - Draft
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