Polyimides with a diazo chromophore exhibiting high thermal stability and large electrooptic coefficients

Haythem Saadeh, Alireza Gharavi, Dong Yu, Luping Yu

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

To synthesize nonlinear optical polyimides exhibiting high nonlinearity and high thermal stablity, a new monomer bearing phenylenediamine and a diazo benzene-type nonlinear optical chromophore (compound 1) was synthesized and polymerized with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride. This diazo chromophore possesses a microscopic optical nonlinearity larger than either the Disperse Red 1 or DANS chromophores. Copolymerization of compound 1 and 1,4-diaminophenylene with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride yielded copolyimides with higher glass transition temperatures. These polyimides exhibit large electrooptic coefficients, r33 ∼ 14-35 pm/V. The second harmonic measurements indicate long-term stability of the dipole orientation (>800 h at 100 °C) for these polyimides.

Original languageEnglish
Pages (from-to)5403-5407
Number of pages5
JournalMacromolecules
Volume30
Issue number18
DOIs
Publication statusPublished - Sep 8 1997
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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