Abstract
Poly(1,4-diethynyl-2,5-dibutoxybenzene), a polymer containing diacetylene group in the main chain, was synthesized by oxidative coupling polymerization. This polymer was confirmed to have relatively high molecular weight and expected to have polydiyne structure without defects. In solid state 13C NMR spectrum of this polymer, the peaks assigned to phenyl carbons were splitted to doublet because there were any kinds of conformation around the single bonds between triple bonds of diacetylene groups. A DSC curve of the polymer indicated that it was cross-linked at 620 K because of starting of the rotation around the single bond. Although conductivity of the polymer was very low, the polymer exhibited relatively high photoconductivity attributed to the nature of the repeating unit.
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Okawa, H., Uryu, T. Synthesis and Electrical Properties of Poly(1,4-diethynyl-2,5-dibutoxybenzene). Polym J 22, 539–545 (1990). https://doi.org/10.1295/polymj.22.539
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DOI: https://doi.org/10.1295/polymj.22.539