Electron beam crosslinked natural rubber/multiwalled carbon nanotube nanocomposite
The physical properties of the rubber blends are influenced by vulcanization and filler distribution. Normally, rubbers are vulcanized by systems based on sulfur or peroxide with the most common filler carbon black. Radiation can also produce crosslink densities like those obtained by sulphur cu...
| Main Authors: | , , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/23091/ http://irep.iium.edu.my/23091/ http://irep.iium.edu.my/23091/1/pp184.pdf |
| Summary: | The physical properties of the rubber blends are influenced by vulcanization and filler distribution.
Normally, rubbers are vulcanized by systems based on sulfur or peroxide with the most common filler
carbon black. Radiation can also produce crosslink densities like those obtained by sulphur curing, but the
net effects, are similar, though not identical. The type of crosslink formed in this method (–C–C–) give
rise to better mechanical properties at higher temperature. This work reports on the investigations carried
out on natural rubber (SMR) filled with the multiwall carbon nanotubes (MWCNTs). This system of
SMR/MWCNTs was subjected to different radiation dosages and compared with nonradiated samples in
order to determine the improvement in mechanical properties of the rubber system in the presence of
MWCNTs and irradiation dosages. The amount of MWCNTs in this study was varied from 1 to 7 Phr
and the irradiation doses were varied from 50 to 200 KGy. Mechanical properties, especially, tensile
strength (TS), elongation at break had been studied as a function of irradiation dose and degree of loading
with MWCNTs. Gel fraction indicated an increase in the degree of crosslink with the increase in the
MWCT and radiation dosage. XRD was carried out to check the increase in the crytallinty of the
nanocomposite system. The overall results obtained indicate significant improvement in the mechanical
and thermal properties by radiation crosslinking in presence of MWCNTs. These results were further
supported by TEM micrograph and nanoindentation. |
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