Masashi KITAMURA *1
Yoshiaki HATA *2
Hiroshi YASUOKA *2
Atsushi ASANO *1
*1:Department of Applied Chemistry, National Defense Academy, Hashirimizu, Yokosuka, Japan
*2:Department of Applied Physics, National Defense Academy, Hashirimizu, Yokosuka, Japan
Nippon Gomu Kyokaishi,(2013),86(9),285-290 Original Paper in Japanese
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.
(Received on May 8, 2013)
(Accepted on July 30, 2013)
Keywords: natural rubber, solid state 13C NMR, magnetic susceptibility, magic-angle spinning, molecular orientation
