Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/26079

TítuloPoly(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-chaveInterfaces
Nanocomposites
Morphology
Polyesters
Reactive extrusion
Data2013
EditoraWiley
RevistaJournal 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.
Tipoarticle
URIhttp://hdl.handle.net/1822/26079
DOI10.1002/pola.26778
ISSN1099-0518
Arbitragem científicayes
AcessorestrictedAccess
Aparece nas coleções:IPC - Artigos em revistas científicas internacionais com arbitragem

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