Static State ¹³C NMR Chemical Shift Change induced by Magnetic Susceptibility of Natural Rubber rolled by Magic-Angle Spinning

Abstract

We investigated the effect of deformation of natural rubber (NR) on ¹³C NMR spectra. The deformation is occurred by the high centrifugal pressure of the fast magic-angle spinning (MAS). The static state ¹³C NMR spectrum of NR after MAS showed broad and apparently anisotropic peaks, while that of NR before MAS was isotropic. We concluded that the origin of the anisotropic ¹³C peak relates to the magnetic susceptibility difference according to the molecular orientation.