Abstract
Solid-state NMR and X-ray scattering are used to study intermolecular interactions in miscible blends of C60 with polystyrene, poly(9-vinylcarbazole), and phase-separate blends with poly(ethylene oxide). Miscible C60 blends prepared by solution precipitation with polystyrene and poly(9-vinylcarbazole) are purple in color, show intermolecular C60−polymer cross-polarization, and do not show the scattering peaks from C60 crystallites. The C60 dynamics measured using the chemical shift anisotropy filter pulse sequence shows that C60 rotates rapidly in the blend and averages the anisotropic line shape, while blending with C60 has a minor effect on the host polymer dynamics. These results demonstrate that C60 interacts weakly with polymers in miscible blends.
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