DSpace DSpace UPC
 Català   Castellano   English  

E-prints UPC >
Altres >
Enviament des de DRAC >

Empreu aquest identificador per citar o enllaçar aquest ítem: http://hdl.handle.net/2117/12467

Ítem no disponible en accés obert per política de l'editorial

Arxiu Descripció MidaFormat
ie101375f.pdf1.02 MBAdobe PDF Accés restringit

Citació: Martinez, A. [et al.]. Microcellular Foaming of Layered Double Hydroxide-Polymer Nanocomposites. "Industrial & engineering chemistry research", 2011, vol. 50, núm. 9, p. 5239-5247.
Títol: Microcellular Foaming of Layered Double Hydroxide-Polymer Nanocomposites
Autor: Martínez Benasat, Antonio Veure Producció científica UPC; Redondo Realinho, Vera Cristina de Veure Producció científica UPC; Sousa Pais Antunes, Marcelo de Veure Producció científica UPC; Maspoch Rulduà, Mª Lluïsa Veure Producció científica UPC; Velasco Perero, José Ignacio Veure Producció científica UPC
Editorial: American Chemical Society (ACS)
Data: 2011
Tipus de document: Article
Resum: Microcellular foams of polystyrene (PS), poly(styrene-co-acrylonitrile) (SAN), and poly(methyl methacrylate) (PMMA) having organically modified layered double hydroxides (LDH) were prepared using a high-pressure CO2 dissolution foaming process and characterized both structurally and thermo-mechanically. The saturation concentration of CO2 was found to increase with the incorporation of LDH nanoparticles into the PMMA, while the opposite effect was observed in the PS and SAN nanocomposites with respect to the pure polymers. The CO2 desorption diffusion coefficient substantially decreased in the nanocomposites comparatively to the respective pure polymers. The incorporation of hydrotalcite (HT) into the polymers and subsequent foaming resulted in foams with finer and more isotropic cellular structures, related to a cell nucleation effect promoted by the particles. No significant differences were found among the several foamed nanocomposites. Both PS and SAN nanocomposite foams displayed higher glass transition temperatures than the respective unfilled ones, related to a higher amount of residual CO2 in the last, favoring plasticization. The contrary effect was observed inPMMA, attributed to a combined plasticizing effect promoted by the higher affinity of PMMA for CO2 and greater interaction with the organically modified HT platelets. Although no significant differences were found among the several nanocomposite foams and respective unfilled counterparts, the incorporation of HT limited the reduction observed in the specific storage moduli with foaming, related to a finer cellular structure induced by the HT particles.
ISSN: 0888-5885
URI: http://hdl.handle.net/2117/12467
DOI: 10.1021/ie101375f
Apareix a les col·leccions:Altres. Enviament des de DRAC
POLYCOM - Polimers i compòsits: tecnologia. Articles de revista
Departament de Ciència dels Materials i Enginyeria Metal·lúrgica. Articles de revista
Comparteix:


Stats Mostra les estadístiques d'aquest ítem

SFX Query

Aquest ítem (excepte textos i imatges no creats per l'autor) està subjecte a una llicència de Creative Commons Llicència Creative Commons
Creative Commons

 

Valid XHTML 1.0! Programari DSpace Copyright © 2002-2004 MIT and Hewlett-Packard Comentaris
Universitat Politècnica de Catalunya. Servei de Biblioteques, Publicacions i Arxius