Properties of ultrahigh-Tg chromophoric polyimides and polyureas as high-performance nonlinear optical materials: architecture-processing-temporal stability relationships

Lifeng Geng*, Jia Fu Wang, Tobin J. Marks, Weiping Lin, Paul M. Lundquist, George K. Wong

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Three complementary approaches to the construction of electric field polable high-Tg (glass transition temperature) polyimides and polyureas as second-order NLO materials are discussed. In the first approach, copolymerization of bismaleimides with o,o′- diallylbisphenol A followed by functionalization with high-β NLO chromophores using a Mitsunobu procedure yields, after poling and curing, a series of heavily crosslinked chromophoric polyimides with Tg values as high as approximately 260°C and χ (2) responses as high as 1.0 × 10 -7 esu (42 pm/V at λ o = 1064 nm, 1.17 eV). In the second two approaches, copolymerization of the chromophore 4,5-bis(4′aminophenyl)-2-(4'-nitrophenyl)imidazole with bismaleimides or diisocyanates yields polyimides and polyureas with Tg values as high as 292°C and partially resonant χ (2) values as high as 0.62 × 10 -7 esu (25 pm/V at λ o = 1064 nm). It is found that careful attention to the details of curing and crosslinking during poling results in NLO-active matrices exhibiting negligible decay in χ (2) on aging in air at 100°C for periods of 1000 - 4000 h. The imidazole- based materials exhibit only approximately 10% χ (2) decay on aging for 100 h at 200°C under N 2.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages96-105
Number of pages10
StatePublished - Dec 1 1995
EventOptical and Photonic Applications of Electroactive and Conducting Polymers - San Diego, CA, USA
Duration: Jul 12 1995Jul 13 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2528
ISSN (Print)0277-786X

Other

OtherOptical and Photonic Applications of Electroactive and Conducting Polymers
CitySan Diego, CA, USA
Period7/12/957/13/95

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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