Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/26079
Título: | Poly(lactic acid) composites with poly(lactic acid)-modified carbon nanotubes |
Autor(es): | Novais, R. M. Simon, Frank Potschke, Petra Villmow, Tobias Covas, J. A. Paiva, M. C. |
Palavras-chave: | Interfaces Nanocomposites Morphology Polyesters Reactive extrusion |
Data: | 2013 |
Editora: | Wiley |
Revista: | Journal of Polymer Science Part A: Polymer Chemistry |
Resumo(s): | This work reports the study of the effect of chemical functionalization of carbon nanotubes on their dispersion in poly(lactic acid). The nanotubes were functionalized by the 1,3-dipolar cycloaddition reaction, generating pyrrolidine groups at the nanotube surface. Further reaction of the pyrrolidine groups with poly(lactic acid) was studied in solution and in the polymer melt. The former involved refluxing the nanotubes in a dimethylformamide/polymer solution; the latter was carried out by direct melt mixing in a microcompounder. The carbon nanotubes collected after each process were characterized by thermogravimetry and by X-ray photoelectron spectroscopy, showing evidence of polymer bonded to the nanotube surface only when the reaction was carried out in the polymer melt. The composites with polymer modified nanotubes present smaller average agglomerate area and a narrower agglomerate area distribution. In addition, they show improved tensile properties at low CNT concentration and present lower electrical resistivity. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/26079 |
DOI: | 10.1002/pola.26778 |
ISSN: | 1099-0518 |
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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J Pol Sci Part A Pol Chem 2013.pdf Acesso restrito! | artigo | 1,26 MB | Adobe PDF | Ver/Abrir |