Vinyl functionalized multiwalled carbon nanotubes (MWCNT-vinyl) are synthesized and used as monomers to prepare poly(ethylene-co-norbornene)-grafted carbon nanotube composites by in situ polymerization with [Ti(?5-C5Me5)(N?CtBu2)Cl2] activated with methylalumoxane (MAO). The glass transition temperatures (Tg) of grafted MWCNT composites are more than 30 degrees C higher than those of copolymers. This difference is rationalized by the immobilization of the copolymer chain to the MWCNT surface by a covalent bond. The Young's modulus is shown to increase by more than 200% compared to poly(ethylene-co-norbornene) by incorporating 3.4 wt% functionalized MWCNT.
Ethylene-coNorbornene Copolymers Grafted Carbon nanotube Composites by In Situ polymerization.
Boggioni L;Scalcione G;Bertini F;D'Arrigo C;Tritto I
2012
Abstract
Vinyl functionalized multiwalled carbon nanotubes (MWCNT-vinyl) are synthesized and used as monomers to prepare poly(ethylene-co-norbornene)-grafted carbon nanotube composites by in situ polymerization with [Ti(?5-C5Me5)(N?CtBu2)Cl2] activated with methylalumoxane (MAO). The glass transition temperatures (Tg) of grafted MWCNT composites are more than 30 degrees C higher than those of copolymers. This difference is rationalized by the immobilization of the copolymer chain to the MWCNT surface by a covalent bond. The Young's modulus is shown to increase by more than 200% compared to poly(ethylene-co-norbornene) by incorporating 3.4 wt% functionalized MWCNT.| File | Dimensione | Formato | |
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Descrizione: Ethylene-coNorbornene Copolymers Grafted Carbon nanotube Composites by In Situ polymerization.
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