In this work, the effect of several carbon fillers, exfoliated graphite (EG), functionalized graphene sheets (FGS), multi-walled carbon nanotubes (MWCNTs), and oxidized multi-walled carbon nanotubes (f-MWCNTs), were compared on the curing process and physical properties of a cationically photocurable epoxy resin. The extent of the photopolymerization was monitored by Real-Time FTIR spectroscopy. It was found that all the nanofillers delayed the curing reaction probably due to a shielding effect as well as to an increase of the resin viscosity. All the systems showed an electrical percolation threshold, but with MWCNTs was attained at a lower concentration (< 0.1 wt.%). In addition, FGS showed the best response in terms of the dynamic mechanical and microindentation performances. An increase of more than 20 C in the glass transition temperature was observed with the addition of 1 wt.% of FGS.
Cationic photocured epoxy nanocomposites filled with different carbon fillers / M. Martin-Gallego; M. Hernandez; V. Lorenzo; R. Verdejo; M.A. Lopez-Manchado; M. Sangermano. - In: POLYMER. - ISSN 0032-3861. - ELETTRONICO. - 53(2012), pp. 1831-1838. [10.1016/j.polymer.2012.02.054]
|Titolo:||Cationic photocured epoxy nanocomposites filled with different carbon fillers|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.polymer.2012.02.054|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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