DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Sun Dal | ko |
dc.contributor.author | Lee, Sanghwa | ko |
dc.contributor.author | Heo, Jaewon | ko |
dc.contributor.author | Kim, Sang Youl | ko |
dc.contributor.author | Chung, Im Sik | ko |
dc.date.accessioned | 2014-08-27T02:45:15Z | - |
dc.date.available | 2014-08-27T02:45:15Z | - |
dc.date.created | 2013-11-06 | - |
dc.date.created | 2013-11-06 | - |
dc.date.issued | 2013-10 | - |
dc.identifier.citation | POLYMER, v.54, no.21, pp.5648 - 5654 | - |
dc.identifier.issn | 0032-3861 | - |
dc.identifier.uri | http://hdl.handle.net/10203/187407 | - |
dc.description.abstract | Unsymmetrical and symmetrical diamine monomers containing trifluoromethyl groups, 2-trifluoro methyl-4,4'-diaminodiphenyl sulfide and 2,2'-bis(trifluoromethyl)-4,4'-diamino-diphenyl sulfide, were synthesized from 2-chloro-5-nitrobenzotrifluoride as a starting material in two steps, respectively. Diamine monomers were polymerized with PMDA, BPDA, BTDA, and ODPA using a solution imidization method with N-methyl-2-pyrrolidone as a solvent at 190 degrees C to obtain the corresponding polyimides. They had inherent viscosities that ranged from 0.54 to 0.71 dL/g in N-methyl-2-pyrrolidone at 30 C. All of the synthesized polyimides showed good solubility in polar aprotic solvents and phenolic solvents regardless of the number of trifluoromethyl groups. The 5% weight loss temperatures of the polyimides are in the range of 534-561 degrees C in nitrogen, and 505-542 C in air. The Tg values and the thermal expansion coefficients of these polymers are in the range of 234-325 degrees C and in the range of 47.4 63.2 ppm/degrees C, respectively. Also, all of the synthesized polyimides have relatively low refractive indices (around 1.6) and birefringence (below 0.36). Published by Elsevier Ltd. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.subject | AROMATIC-SUBSTITUTION REACTION | - |
dc.subject | NITRO DISPLACEMENT REACTION | - |
dc.subject | POLY(BIPHENYLENE OXIDE)S | - |
dc.subject | UNSYMMETRICAL DIAMINE | - |
dc.subject | FLUORINATED POLYIMIDES | - |
dc.subject | RELATIVE PERMITTIVITY | - |
dc.subject | POLY(ARYLENE ETHER)S | - |
dc.subject | REFRACTIVE-INDEXES | - |
dc.subject | CYANO GROUPS | - |
dc.subject | FREE-VOLUME | - |
dc.title | Soluble polyimides with trifluoromethyl pendent groups | - |
dc.type | Article | - |
dc.identifier.wosid | 000326204200025 | - |
dc.identifier.scopusid | 2-s2.0-84885023400 | - |
dc.type.rims | ART | - |
dc.citation.volume | 54 | - |
dc.citation.issue | 21 | - |
dc.citation.beginningpage | 5648 | - |
dc.citation.endingpage | 5654 | - |
dc.citation.publicationname | POLYMER | - |
dc.identifier.doi | 10.1016/j.polymer.2013.08.057 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Kim, Sang Youl | - |
dc.contributor.nonIdAuthor | Kim, Sun Dal | - |
dc.contributor.nonIdAuthor | Lee, Sanghwa | - |
dc.contributor.nonIdAuthor | Heo, Jaewon | - |
dc.contributor.nonIdAuthor | Chung, Im Sik | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Trifluoromethyl groups | - |
dc.subject.keywordAuthor | Polyimides | - |
dc.subject.keywordAuthor | High performance polymers | - |
dc.subject.keywordPlus | AROMATIC-SUBSTITUTION REACTION | - |
dc.subject.keywordPlus | NITRO DISPLACEMENT REACTION | - |
dc.subject.keywordPlus | POLY(BIPHENYLENE OXIDE)S | - |
dc.subject.keywordPlus | UNSYMMETRICAL DIAMINE | - |
dc.subject.keywordPlus | FLUORINATED POLYIMIDES | - |
dc.subject.keywordPlus | RELATIVE PERMITTIVITY | - |
dc.subject.keywordPlus | POLY(ARYLENE ETHER)S | - |
dc.subject.keywordPlus | REFRACTIVE-INDEXES | - |
dc.subject.keywordPlus | CYANO GROUPS | - |
dc.subject.keywordPlus | FREE-VOLUME | - |
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