Solid state NMR studies of syndiotactic polystyrene ethylbenzene and poly(ethylene oxide)/LiCF3SO3 molecular complexes

Solvent dynamics and polymer-solvent interactions in syndiotactic (s) polys tyrene (PS)/ethylbenzene (PhEt) clathrates, as well as polymer-salt interac tions in the poly(ethylene oxide) (PEO)/LiCF3SO3 complex, were characterize d by solid state H-1 and C-13 NMR. H-1 static and H-1 MAS NMR spectra have shown that PhEt molecules in s-PS clathrates retain relatively large, but s patially anisotropic mobility. C-13 CP/MAS (cross polarization/magic angle spinning) spectra and CP dynamics measured for s-PS-d(8)/PhEt system indica te that at least a part of PhEt molecules are intercalated between phenyl r ings of s-PS. C-13 CP/MAS NMR spectra show that PEO carbons in complex with LiCF3SO3 are more shielded in comparison to neat crystalline PEO. The resu lts (distances) obtained from CP dynamics are in agreement with the publish ed crystal structure of the PEO/LiCF3SO3 complex. C-13 spin-lattice relaxat ion time measurements have shown that the mobility of PEO in the complex is lower than that in neat crystalline PEO.