writer：Sun PC, Zhu JJ, Chen TH
keywords：Rubber/clay nanocomposite, NMR, Clay dispersion, Confinement
source：期刊
specific source：Chinese Journal of Polymer Science 2009, 27, 71-76
Issue time：2009年
2H-NMR spectroscopy of the probe molecule, deuterated benzene, was applied to characterize organo-clay dispersion and confinement effect on the local motion of benzene in rubber/clay nanocomposite-gels. The observed 2H line shapes of benzene in intercalated and exfoliated nanocomposites were obviously different, which can be used to estimate clay-dispersion quality. 2H-NMR line shapes also reflect the different influence of intercalated or exfoliated layered-silicates on local motions of benzene, implying that probe molecules exhibit different local motions depending on different confined geometry in these nanocomposites. Viscosity measurements further confirmed these NMR results.