RT Journal Article
T1 Curing of epoxy/carbon nanotubes physical networks
A1 Chapartegui, Maialen
A1 Markaide, Nerea
A1 Florez, Sonia
A1 Elizetxea, Cristina
A1 Fernandez, Mercedes
A1 Santamaria, Anton
AB A melt-mixing procedure has been used to disperse multi-walled carbon nanotubes (MWCNT) in an epoxy matrix. According to dynamic viscoelastic results, a physical network is formed for carbon nanotube concentrations of 0.3 weight per cent (wt%) and above. The temperature activated curing process is followed analyzing the evolution of the dynamic viscoelastic functions and the dielectric loss with time. Curing process from a physical to a chemical network is monitored. The presence of MWCNT accelerates curing, even when the rheological percolation is not reached (absence of physical network). Several hypotheses are considered to explain this result. Electrical conductivity decreases during cure, so lower electrical conductivities are found for cured MWCNT/epoxy samples than for dispersions: this is explained by a distortion of nanotubes physical network and a reduction of the ionic conductivity contribution of the liquid phase.
SN 0032-3888
YR 2012
FD 2012-03
LK https://hdl.handle.net/11556/4147
UL https://hdl.handle.net/11556/4147
LA eng
NO Chapartegui , M , Markaide , N , Florez , S , Elizetxea , C , Fernandez , M & Santamaria , A 2012 , ' Curing of epoxy/carbon nanotubes physical networks ' , Polymer Engineering and Science , vol. 52 , no. 3 , pp. 663-670 . https://doi.org/10.1002/pen.22131
DS TECNALIA Publications
RD 29 sept 2024