ROMP of norbornene catalysed by Grubbs functionalized carbon nanotubes
P. Longo, C. Costabile, F. Grisi, G. Siniscalchi, P. Ciambelli, M. Sarno, C. Leone, D. Sannino
University of Salerno, IT
Keywords: romp, Grubbs catalyst, carbon nanotubes, norbernene
Abstract:Recently, carbon nanotubes have attracted attention for their unique structural and electronic properties, which position them as one of the leading materials for a wide array of potential nanotechnological applications. The synthesis of homogeneuos polymeric materials containing multi-walled carbon nanotubes (MWNTs), able to combine the mechanical strength and electronic conductivity of carbon nanotubes with the solubility and processability of polymers, still represents a challenge. To improve the properties of the materials, polymers can be grown directly on a nanotube surface presenting a grafted catalyst. Herein, the synthesis of polynorbornene by ring opening metathesis polymerization (ROMP) in the presence of 1st and 2nd generation Grubbs catalyst-functionalized nanotubes, is reported. A full characterization of the 1st and 2nd generation Grubbs catalyst-functionalized nanotubes was performed by IR (Infrared) and TGA (Thermogravimetric Analysis) on-line connected with a quadrupole-mass spectrometer, in order to quantify the amount of catalyst grafted to the nanotube surface. The activities of the catalyst-functionalized nanotubes in ROMP of 2-norbornene were compared with those of pure 1st and 2nd generation Grubbs catalysts and the obtained materials were characterized by DSC (Differential Scanning Calorimetry), IR, TG-DTA-MS analysis, and Scanning Electron Microscopy (SEM) images.