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Highly fluorinated poly(1,3,4-oxadiazole-ether)s. structural, optical and dielectric characteristics

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Abstract

New fluorinated poly(1,3,4-oxadiazole-ether)s were prepared by nucleophilic aromatic substitution technique of an activated aromatic difluorinated compound with a bisphenol containing three trifluoromethyl groups, namely 1,1-bis(4′-hydroxyphenyl)-1-(3′,5′-ditrifluoromethylphenyl)-2,2,2-trifluoroethane, 1, or with a mixture of 1 and 9,9-bis(4-hydroxyphenyl)fluorene. FTIR and NMR spectroscopy were used to confirm the structure of the polymers. The polymers were easily soluble in organic solvents and could be processed in flexible thin films. The film surfaces exhibited hydrophobic characteristics, as it was determined by contact angle measurements. The polymers had high thermal stability, up to 440 °C, and glass transition temperature in the range of 202–237 °C. They showed fluorescence in the blue region, both in solution and in solid state. The change in electronic absorption and emission spectra of one of the polymer in neat and binary solvent mixtures has been studied. Broadband dielectric spectroscopy was used to investigate the relaxation processes in polymers. The dielectric constant of the polymers was in the range of 2.84–2.96, at 100 °C and 10 kHz, and decreased with the increase of fluorine content.

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Acknowledgments

Paper dedicated to the 65th anniversary of “Petru Poni” Institute of Macromolecular Chemistry of Romanian Academy, Iasi, Romania. The authors gratefully acknowledge the financial support of UEFISCDI through PN-II-PT-PCCA-2013-4 project, contract no. 43/2014, funded under Joint Applied Research Projects - Parteneriate 2013.

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Authors and Affiliations

  1. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, Iasi, 700487, Romania

    Alina-Mirela Ipate, Corneliu Hamciuc, Mihaela Homocianu, Valentina Elena Musteata, Alina Nicolescu & Maria Bruma

  2. Nesmeyanov Institute of Organoelement Compounds, Vavilov St. 28, Moscow, 119991, Russia

    Nataliya Belomoina

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  1. Alina-Mirela Ipate
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  2. Corneliu Hamciuc
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  3. Mihaela Homocianu
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  4. Valentina Elena Musteata
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  6. Maria Bruma
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  7. Nataliya Belomoina
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Correspondence to Alina-Mirela Ipate.

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Ipate, AM., Hamciuc, C., Homocianu, M. et al. Highly fluorinated poly(1,3,4-oxadiazole-ether)s. structural, optical and dielectric characteristics. J Polym Res 22, 95 (2015). https://doi.org/10.1007/s10965-015-0687-5

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