Multifunctional properties of multi-wall carbon nanotubes/cyanate-ester nanocomposites and CFRPs
2009
The incorporation of multi-wall carbon nanotubes at weight fractions of 0.5% wt. and 1% wt. in a PRIMASET cyanate
ester system (PT-30) was examined. The thermo-mechanical and electrical properties of the developed nanopolymers
were investigated and were compared with the neat matrix properties. A preparation method was developed for the
incorporation of the fillers in the resin system. The phenomenon of re-agglomeration of nanotubes took place in the first
stages of curing schedule but nevertheless according to the SEM images a good dispersion was generally achieved. DSC,
DMA, TGA and thermal conductivity tests were performed for the thermal characterization. For the electrical
characterization, AC and DC measurements took place. No significant change in the glass transition temperature (Tg),
thermal conductivity and mass loss values was observed in comparison with the neat resin systems. However, in both
cases the improvement of electrical conductivity was about nine orders of magnitude, indicating that percolation had
been achieved. The elastic modulus in bending was examined and a slight increase was observed in direct comparison
with the neat resin. Finally, the developed doped nanopolymer was used as matrix for the CFRPs manufacturing. A full
manufacturing protocol was developed in order to overcome the challenging issues concerning the cyanate esters'
handling and manufacturing processes. Moreover AC and DC measurements were performed along with thermal
conductivity measurements and TMA. The produced modified composites were tested for short beam strength.
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