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

  • Alina-Mirela Ipate
  • Corneliu Hamciuc
  • Mihaela Homocianu
  • Valentina Elena Musteata
  • Alina Nicolescu
  • Maria Bruma
  • Nataliya Belomoina
Original Paper

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.

Keywords

Fluorinated polyethers 1,3,4-oxadiazole ring Contact angle Blue fluorescence Low dielectric constant 

Notes

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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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Alina-Mirela Ipate
    • 1
  • Corneliu Hamciuc
    • 1
  • Mihaela Homocianu
    • 1
  • Valentina Elena Musteata
    • 1
  • Alina Nicolescu
    • 1
  • Maria Bruma
    • 1
  • Nataliya Belomoina
    • 2
  1. 1.“Petru Poni” Institute of Macromolecular ChemistryIasiRomania
  2. 2.Nesmeyanov Institute of Organoelement CompoundsMoscowRussia

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