The optical spectroscopy of poly(p-phenylene vinylene)/polyvinyl alcohol blends: from aggregates to isolated chromophores
نویسندگان
چکیده
We report the effects of blending a non-conjugated polymer, polyvinyl alcohol (PVA), with the precursor polymer of poly(p-phenylene vinylene) (PPV). After thermal conversion, the PVA/PPV blends show markedly different absorption and luminescence spectra than neat PPV, even in blends containing only 1 wt.% PVA. These changes coincide with the disappearance of the nanocrystalline domains present in neat PPV. The temperature dependence of the fluorescence decay is not as sensitive to PVA concentration, but also disappears for blends containing more than 60% PVA. The extreme sensitivity of PPV’s optical spectroscopy to small amounts of amorphous blends suggests that the ordered domains play an important role in determining its spectroscopic properties. © 2003 Elsevier B.V. All rights reserved.
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