Premium
Solid state NMR studies of syndiotactic polystyrene/ethylbenzene and poly(ethylene oxide)/LiCF 3 SO 3 molecular complexes
Author(s) -
Spêváček Jiří,
Brus Jiři
Publication year - 1999
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19991380116
Subject(s) - polystyrene , ethylbenzene , nmr spectra database , chemistry , ethylene oxide , magic angle spinning , solid state nuclear magnetic resonance , polymer , solvent , styrene , polymer chemistry , copolymer , crystallography , materials science , nuclear magnetic resonance spectroscopy , spectral line , nuclear magnetic resonance , benzene , organic chemistry , physics , astronomy
Abstract Solvent dynamics and polymer‐solvent interactions in syndiotactic ( s ) polystyrene (PS)/ethylbenzene (PhEt) clathrates, as well as polymer‐salt interactions in the poly(ethylene oxide) (PEO)/LiCF 3 SO 3 complex, were characterized by solid state 1 H and 13 C NMR. 1 H static and 1 H MAS NMR spectra have shown that PhEt molecules in s ‐PS clathrates retain relatively large, but spatially anisotropic mobility. 13 C CP/MAS (cross polarization/magic angle spinning) spectra and CP dynamics measured for s ‐PS‐ dg /PhEt system indicate that at least a part of PhEt molecules are intercalated between phenyl rings of s ‐PS. 13 C CP/MAS NMR spectra show that PEO carbons in complex with LiCF 3 SO 3 are more shielded in comparison to neat crystalline PEO. The results (distances) obtained from CP dynamics are in agreement with the published crystal structure of the PEO/LiCF 3 SO 3 complex. 13 C spin‐lattice relaxation time measurements have shown that the mobility of PEO in the complex is lower than that in neat crystalline PEO.