Grafting of Poly(tBA) and PtBA‐b‐PMMA onto the Surface of SWNTs Using Carbanions as the Initiator

Abstract

Summary: Soluble carbon nanotubes were prepared by treating SWNTs with sec‐butyllithium and subsequently using the generated carbanions as the initiator to graft PtBA and PtBA‐b‐PMMA onto the surface of SWNTs. The anionic polymerization initiated by SWNTs‐bearing carbanions not only provides a powerful strategy for functionalizing SWNTs but also gives us knowledge of the sidewall chemistry of SWNTs. The results indicate that a carbanion born on SWNTs behaves like an anionic initiator with high steric hindrance.Anionic polymerization of (meth)acrylate monomer.imageAnionic polymerization of (meth)acrylate monomer.

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“…Using the same approach, Chen et al [38] showed that the carbanions on the surface of SWNTs can initiate the polymerization of tert-butyl acrylate (t-BA) but not that of methyl methacrylate (MMA) (Scheme 7). The authors suggested that a possible reason for this behavior was the difference in the reactivity of the two monomers toward the delocalized carbanions on the SWNTs.…”