Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/24336
Título: | The influence of carbon nanotube functionalization route on the efficiency of dispersion in polypropylene by twin-screw extrusion |
Autor(es): | Novais, Rui Manuel Freitas Simon, Frank Paiva, M. C. Covas, J. A. |
Palavras-chave: | Polymer–matrix composites (PMCs) Extrusion Surface treatments A. Polymer-matrix composites (PMCs) E. Extrusion E. Surface treatments |
Data: | Ago-2012 |
Editora: | Elsevier 1 |
Revista: | Composites Part A: Applied Science and Manufacturing |
Resumo(s): | The joint effect of chemical functionalization and polymer melt blending conditions on carbon nanotube dispersion in polypropylene, as well as its influence on the electrical and mechanical properties of the resulting composites were investigated. Melt blending was performed using a prototype twin screw extruder enabling sampling along the barrel. The carbon nanotube dispersion was assessed by optical and scanning electron microscopy. The functionalization reaction was tailored for compatibility with the polymer, and characterized by X-ray photoelectron spectroscopy. In particular, nanotubes covalently bonded to polypropylene showed distinctive dispersion ability, while the carbon nanotube dispersion remained stable even after re-melting. However, the polypropylene-functionalized nanotubes produced composites with higher electrical resistivity, possibly due to the insulating effect of the polymer bonded to the nanotubes surface. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/24336 |
DOI: | 10.1016/j.compositesa.2012.08.004 |
ISSN: | 1359-835X |
Versão da editora: | http://dx.doi.org/10.1016/j.compositesa.2012.08.004 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Composites Part A_2012_2nd.pdf Acesso restrito! | Estudo da dispersão de PP - 2 | 1,74 MB | Adobe PDF | Ver/Abrir |