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In situ polymerization of methyl methacrylate/multi-walled carbon nanotube composites using cationic stearyl methacrylate copolymers as dispersants |
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| Authors: | M Lahelin A Vesterinen A Nykänen J Ruokolainen J Seppälä |
| Institution: | aAalto University School of Science and Technology, Department of Biotechnology and Chemical Technology, Polymer Research Group, Kemistintie 1, P.O. Box 16100, FI-00076 Aalto, Finland;bAalto University School of Science and Technology, Department of Information and Natural Sciences, Molecular Materials Research Group, Puumiehenkuja 2, P.O. Box 15100, FI-00076 Aalto, Finland |
| Abstract: | Novel water-soluble amphiphilic copolymers (poly(stearyl methacrylate)-stat-(2-(methacryloyloxy)ethyl] trimethyl ammonium iodide)]) for dispersing multi-walled carbon nanotubes (MWCNTs) were used to carry out in situ methyl methacrylate (MMA) polymerization. The morphology of the poly(methyl methacrylate)/MWCNT composites and the dispersion of the MWCNTs were analyzed by transmission electron microscopy. The dispersion of multi-walled carbon nanotubes in the composites was excellent for cationic SMA (stearyl methacrylate) copolymers, even at high MWCNT loading (6.0 wt.%). The mechanical properties and electrical and thermal conductivities of the composites were also analyzed. Mechanical properties were improved by MWCNTs; the strain at break values remained stable up to 6.0 wt.% MWCNT loading. Both electrical and thermal conductivities were improved by the addition of MWCNTs. |
| Keywords: | Nanocomposite In situ polymerization Polymeric surfactant Mechanical properties Electrical conductivity Electron microscopy |
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