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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 25 | - |
dc.citation.startPage | 11 | - |
dc.citation.title | MOLECULAR CRYSTALS AND LIQUID CRYSTALS | - |
dc.citation.volume | 357 | - |
dc.contributor.author | Park, Lee Soon | - |
dc.contributor.author | Kim, Sung Jin | - |
dc.contributor.author | Choi, Soo Young | - |
dc.contributor.author | Kim, Gi Heon | - |
dc.date.accessioned | 2023-12-22T12:06:10Z | - |
dc.date.available | 2023-12-22T12:06:10Z | - |
dc.date.created | 2015-09-24 | - |
dc.date.issued | 2001-01 | - |
dc.description.abstract | Photocrosslinkable polyimide-type non-linear optical (NLO) polymers were obtained by multi-step reactions. Polyimide substrate polymer (P05) made From 3,3'-diamino-4,4'-dihydroxybiphenyl (HAB) and aromatic dianhydride (6FDA) had higher molecular weight than other polyimides due to the high nucleophilicity of the amine group in HAB compared to the one in 2,2'-bis(3-amino-4-hydroxyphenyl)hexafluoropropane(Biri-AP-AF) with the electron-withdrawing group. The introduction of DR-1 chromophore into the polyimide substrate polymers depended on the steric factor between the bulky DR-1 chromophore and the substrate polyimide in the polymer reaction via the Mitsunobu reaction. In the DR-1 substituted NLO polyimides, Tg decreased with the increasing amount of DR-1 chromophore. Photocrosslinkable NLO polyimide (P05-DR-cin) was obtained by the introduction of the photoreactive cinnamoyl group into the DR-1 substituted polyimides. The electro-optic coefficient (r(33)) Of the NLO polymer was determined with an experimental set-up capable of real-time measurement by varying both the poling field and temperature. The electro-optic coefficient (r(33)) of the linear NLO polymer (P05-DR) started to show a decrease of the r(33) value from about 80 degreesC. The photocrosslinked NLO polymer (P05-DR-cin). however, maintained a high r(33) value up to 150 degreesC due to chromophores locked in the polymer matrix with a network structure | - |
dc.identifier.bibliographicCitation | MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.357, pp.11 - 25 | - |
dc.identifier.doi | 10.1080/10587250108028241 | - |
dc.identifier.issn | 1542-1406 | - |
dc.identifier.scopusid | 2-s2.0-0034953932 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/17154 | - |
dc.identifier.url | http://www.tandfonline.com/doi/abs/10.1080/10587250108028241 | - |
dc.identifier.wosid | 000168788200002 | - |
dc.language | 영어 | - |
dc.publisher | TAYLOR & FRANCIS LTD | - |
dc.title | Synthesis of photocrosslinkable non-linear optic polyimides and electro-optic properties | - |
dc.type | Article | - |
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