Abstract
2H quadrupole echo NMR spectra have been obtained from stacked films of stretched vinylene-deuterated poly(p-phenylenevinylene) with their draw axes ligned relative to the NMR magnetic field. The 2 H spectra show that the orientation of the vinylene C-D bonds of PPV-d 2 is similar to that of a structure based on trans-stilbene. Spectra obtained at high temperature reveal substantial chain motion and are consistent with a 180° rotational jump of portions of the PPV chain about the crystallographic c axis. Inversion-recovery quadrupole echo spectra were obtained for these films to determine tha anisotropy and magnitude of T 1 .
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