dc.citation.endPage |
25 |
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dc.citation.startPage |
11 |
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dc.citation.title |
MOLECULAR CRYSTALS AND LIQUID CRYSTALS |
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dc.citation.volume |
357 |
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dc.contributor.author |
Park, Lee Soon |
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dc.contributor.author |
Kim, Sung Jin |
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dc.contributor.author |
Choi, Soo Young |
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dc.contributor.author |
Kim, Gi Heon |
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dc.date.accessioned |
2023-12-22T12:06:10Z |
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dc.date.available |
2023-12-22T12:06:10Z |
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dc.date.created |
2015-09-24 |
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dc.date.issued |
2001-01 |
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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 |
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dc.identifier.bibliographicCitation |
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v.357, pp.11 - 25 |
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dc.identifier.doi |
10.1080/10587250108028241 |
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dc.identifier.issn |
1542-1406 |
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dc.identifier.scopusid |
2-s2.0-0034953932 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/17154 |
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dc.identifier.url |
http://www.tandfonline.com/doi/abs/10.1080/10587250108028241 |
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dc.identifier.wosid |
000168788200002 |
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dc.language |
영어 |
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dc.publisher |
TAYLOR & FRANCIS LTD |
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dc.title |
Synthesis of photocrosslinkable non-linear optic polyimides and electro-optic properties |
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dc.type |
Article |
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