Nuclear Magnetic Resonance Spectroscopy for the Analysis of Soft Materials

(3) Solid State NMR Study of Rubbers and Nanocomposites

Abstract

In this review, we discussed the characteristics of the high-resolution solid state NMR analysis for the rubbers and nanocomposites. The change of the molecular motion of the vulcanized styrene-butadiene rubber (SBR) affected by the magic angle spinning (MAS) were studied by the temperature dependence of the ¹H spin-lattice relaxation time (T₁). We investigated the orientation direction of the unvulcanized natural rubber through the static angular-dependent ¹³C NMR. The rubbers having the double bond in the unit showed the angular dependence of the magnetic susceptibility against the applied static magnetic field, while the rubbers without the double bond did not show such dependence. The role of the organic modifier on clay surface in the Nylon6/clay nanocomposites was analyzed by the simple ¹H MAS NMR spectra.