Mostra el registre d'ítem simple
Study of the cellular structure heterogeneity and anisotropy of polypropylene and polypropylene nanocomposite foams
dc.contributor.author | Antunes, Marcelo de Sousa Pais |
dc.contributor.author | Velasco Perero, José Ignacio |
dc.contributor.author | Redondo Realinho, Vera Cristina de |
dc.contributor.author | Solórzano Quijano, Eusebio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica |
dc.date.accessioned | 2010-03-30T15:56:12Z |
dc.date.available | 2010-03-30T15:56:12Z |
dc.date.created | 2009 |
dc.date.issued | 2009 |
dc.identifier.citation | De Sousa Pais, M. [et al.]. Study of the cellular structure heterogeneity and anisotropy of polypropylene and polypropylene nanocomposite foams. "Polymer engineering and science", 2009, vol. 49, núm. 12, p. 2400-2413. |
dc.identifier.issn | 0032-3888 |
dc.identifier.uri | http://hdl.handle.net/2117/6843 |
dc.description.abstract | This article presents the analysis of the processing parameters influence on the foaming behavior and cellular structure of PP-montmorillonite foams. Polypropylene nanocomposites containing 5.0 phr of an organically- modified montmorillonite (MMT) were initially melt-compounded in a twin-screw extruder with azodicarbonamide (ADC) and later foamed using a one-step compression-molding process. The cellular structure and morphology of the foams was assessed using both scanning and transmission electron microscopies. A time-dependant double-effect was observed during foaming: (1) first of all, the melt strength of the polymer, too high for shorter times, not allowing full cell growth, and too low for high foaming times due to thermal oxidation; (2) and polymer degradation, clearly observed for very high foaming times, directly affecting polymer’s melt resistance. Comparatively, PP-MMT foams exhibited a broader foaming time processing window, a more isometric type of cellular structure and decreased open-cell contents, indicating an effective nucleation and cell wall stabilization induced by the exfoliated MMT particles. |
dc.format.extent | 14 p. |
dc.language.iso | eng |
dc.publisher | Society of Plastics Engineers |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers |
dc.subject.lcsh | Polypropylene |
dc.subject.lcsh | Nanocomposites (Materials) |
dc.title | Study of the cellular structure heterogeneity and anisotropy of polypropylene and polypropylene nanocomposite foams |
dc.type | Article |
dc.subject.lemac | Polipropilè |
dc.contributor.group | Universitat Politècnica de Catalunya. POLYCOM - Polimers i compòsits: tecnologia |
dc.identifier.doi | 10.1002/pen.21488 |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 2170873 |
dc.description.version | Postprint (published version) |
local.citation.author | De Sousa Pais, M.; Velasco J.I.; De Redondo, V.; Solórzano, E. |
local.citation.publicationName | Polymer engineering and science |
local.citation.volume | 49 |
local.citation.number | 12 |
local.citation.startingPage | 2400 |
local.citation.endingPage | 2413 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [960]
-
Articles de revista [96]