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 λo = 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 λo = 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 N2.
Original language | English |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Publisher | Society of Photo-Optical Instrumentation Engineers |
Pages | 96-105 |
Number of pages | 10 |
Volume | 2528 |
ISBN (Print) | 0819418870, 9780819418876 |
DOIs | |
Publication status | Published - 1995 |
Event | Optical and Photonic Applications of Electroactive and Conducting Polymers - San Diego, CA, USA Duration: Jul 12 1995 → Jul 13 1995 |
Other
Other | Optical and Photonic Applications of Electroactive and Conducting Polymers |
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City | San Diego, CA, USA |
Period | 7/12/95 → 7/13/95 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering