Effects of blending on local chain dynamics and glass transition: Polystyrene/poly(vinyl methyl ether) blends as studied by high-resolution solid-state 13C nuclear magnetic resonance spectroscopy
- 15 February 1991
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 94 (4) , 3200-3206
- https://doi.org/10.1063/1.460707
Abstract
To evaluate effects of blending on molecular motion of the individual polymer components in a compatible polymer blend, polystyrene/poly(vinyl methyl ether)(PS/PVME), the temperature dependence of 13C nuclear magnetic resonance linewidth for CH carbon resonance of PVME was studied under conditions of magic‐angle spinning and proton dipolar decoupling. The observed temperature dependence was satisfactorily explained by assuming the following effects of molecular motion: (1) averaging the dispersion of isotropic chemical shifts in the glassy state and (2) the interference between local anisotropic motion and high‐power proton decoupling. The activation parameters for motion of PVME of the blends were determined, and the compositional dependence is discussed. It is concluded that microscopically homogeneous mixing is achieved for PS/PVME blends.Keywords
This publication has 19 references indexed in Scilit:
- The influence of blending on the local motions of polymers. Studies involving polycarbonate, poly(methyl methacrylate), and a polyesterMacromolecules, 1989
- Intermolecular polarization transfer study of polymer blend compatibilityJournal of Polymer Science Part C: Polymer Letters, 1987
- Off resonance heteronuclear spin-decoupling in solidsJournal of Magnetic Resonance (1969), 1986
- Carbon-13 chemical shielding tensors in l-threonineJournal of Magnetic Resonance (1969), 1983
- Setting the magic angle using a quadrupolar nuclideJournal of Magnetic Resonance (1969), 1982
- Resolution in 13C NMR of organic solids using high-power proton decoupling and magic-angle sample spinningJournal of Magnetic Resonance (1969), 1981
- The Influence of Solvent upon the Compatibility of Polystyrene and Poly(vinyl methyl ether)Macromolecules, 1971
- Calibration of methanol nuclear magnetic resonance thermometer at low temperatureAnalytical Chemistry, 1970
- Double Nuclear Magnetic Resonance and the Dipole Interaction in SolidsPhysical Review B, 1958
- The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymers and Other Glass-forming LiquidsJournal of the American Chemical Society, 1955