Synthesis and characterization of novel polyhalogenaromatic polyimide material for electro-optic applications

Tamara A. Vaganova, Alexander I. Plekhanov, Andrey E. Simanchuk, Sergey L. Mikerin, Evgenij V. Spesivtsev, Elena V. Karpova, Tatiana S. Frolova, Evgenij V. Malykhin

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

New highly fluorinated aromatic polyimide based on 4-chloro-2,5,6-trifluoro-1,3-phenylenediamine and 2,2-bis(3′,4′-dicarboxyphenyl)hexafluoropropane dianhydride was prepared by the two methods condensation in a solution followed by a high-temperature solid-state chain extension and one-pot high temperature polycondensation in a benzoic acid melt. The polyimide is soluble in polar amide- and ketone-type solvents, has good thermal stability and a high glass transition temperature. The polyimide films exhibit a low cut-off wavelength and excellent transparency in the UV-vis-near IR range. Low molecular weight prepolymer, formed by the solution condensation, was used to obtain the guest-host electro-optic polymer having a high glass transition temperature. The prepolymer layer doped with azochromophore DR1 (25 wt%) was subjected to a combined poling+curing procedure upon a two-stepped heating in a corona discharge field. Nonlinear optical coefficient d33 of the prepared chromophore-doped highly halogenated polyimide film measured by the Maker fringes method is 70 pm/V at the fundamental wavelength of 1064 nm and remains stable up to 85 °C.

Original languageEnglish
Pages (from-to)70-78
Number of pages9
JournalJournal of Fluorine Chemistry
Volume195
DOIs
Publication statusPublished - 1 Mar 2017

Keywords

  • NLO material
  • Polycondensation
  • Polyfluorinated polyimides
  • Second harmonic generation
  • THERMAL-STABILITY
  • NONLINEAR-OPTICAL POLYMERS
  • SIDE-CHAIN
  • POLYMERIZATION
  • AZO CHROMOPHORES
  • FLUORINATED POLYIMIDES
  • SOLUBLE POLYIMIDES
  • REFRACTIVE-INDEX
  • RECENT PROGRESS
  • SYSTEMS

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