DC Field | Value | Language |
---|---|---|
dc.contributor.author | Woo, HY | ko |
dc.contributor.author | Shim, Hong Ku | ko |
dc.contributor.author | Lee, KS | ko |
dc.contributor.author | Jeong, MY | ko |
dc.contributor.author | Lim, TK | ko |
dc.date.accessioned | 2013-03-03T08:45:57Z | - |
dc.date.available | 2013-03-03T08:45:57Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 1999-02 | - |
dc.identifier.citation | CHEMISTRY OF MATERIALS, v.11, no.2, pp.218 - 226 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/10203/78028 | - |
dc.description.abstract | Three functionalized second-order nonlinear optical polyimides were synthesized by the step growth polymerization reaction between a chromophore-containing dianhydride and three different diamine compounds. This alternate approach (i.e., incorporating a nonlinear chromophore into a dianhydride monomer) may avoid troublesome syntheses of the chromophore-containing diamine and can provide easy preparation of the polyimides with various chromophores. The number-average molecular weights (M-n) of final polymers determined by GPC ranged between 10 000 and 16 800 (M-w/M-n = 1.59-2.28). No melting was detected and they showed relatively low glass-transition temperatures ranging from 161 to 181 degrees C. They are readily soluble in aprotic polar solvents such as tetrahydrofuran, N,N-dimethylformamide, N-methylpyrrolidinone, and so forth. High optical quality films were prepared by spin casting from a 10 wt % cyclohexanone or N-methylpyrrolidinone solution. The second harmonic generation (SHG) coefficients, d(33), of the polymers were determined to be 24-37 pm/V (d(33)(infinity) = 7-1.0 pm/V) at a fundamental wavelength of 1064 nm. All of the poled polymer samples showed outstanding orientational stability up to 125 degrees C without any measurable decay of the SHG signal. In particular, the polyimide with a 4,4'-(hexafluoroisopropylidene)dianiline unit (PI-2-DANS) showed the best dynamical thermal stability of the poling-induced dipole! alignment up to ca. 170 degrees C. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | CHAIN AROMATIC POLYIMIDES | - |
dc.subject | SIDE-CHAIN | - |
dc.subject | THERMAL-STABILITY | - |
dc.subject | 2ND-HARMONIC GENERATION | - |
dc.subject | 2ND-ORDER NONLINEARITY | - |
dc.subject | ELECTROOPTIC COEFFICIENTS | - |
dc.subject | ELECTRIC-FIELD | - |
dc.subject | WAVE-GUIDES | - |
dc.subject | GUEST-HOST | - |
dc.subject | POLYMERS | - |
dc.title | An alternate synthetic approach for soluble nonlinear optical polyimides | - |
dc.type | Article | - |
dc.identifier.wosid | 000079139400010 | - |
dc.identifier.scopusid | 2-s2.0-0000395175 | - |
dc.type.rims | ART | - |
dc.citation.volume | 11 | - |
dc.citation.issue | 2 | - |
dc.citation.beginningpage | 218 | - |
dc.citation.endingpage | 226 | - |
dc.citation.publicationname | CHEMISTRY OF MATERIALS | - |
dc.contributor.localauthor | Shim, Hong Ku | - |
dc.contributor.nonIdAuthor | Woo, HY | - |
dc.contributor.nonIdAuthor | Lee, KS | - |
dc.contributor.nonIdAuthor | Jeong, MY | - |
dc.contributor.nonIdAuthor | Lim, TK | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | CHAIN AROMATIC POLYIMIDES | - |
dc.subject.keywordPlus | SIDE-CHAIN | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | 2ND-HARMONIC GENERATION | - |
dc.subject.keywordPlus | 2ND-ORDER NONLINEARITY | - |
dc.subject.keywordPlus | ELECTROOPTIC COEFFICIENTS | - |
dc.subject.keywordPlus | ELECTRIC-FIELD | - |
dc.subject.keywordPlus | WAVE-GUIDES | - |
dc.subject.keywordPlus | GUEST-HOST | - |
dc.subject.keywordPlus | POLYMERS | - |
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