Soluble polyimides with trifluoromethyl pendent groups

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dc.contributor.authorS D Kim-
dc.contributor.authorS Lee-
dc.contributor.authorJ Heo-
dc.contributor.authorS Y Kim-
dc.contributor.authorIm Sik Chung-
dc.date.accessioned2017-04-19T09:43:02Z-
dc.date.available2017-04-19T09:43:02Z-
dc.date.issued2013-
dc.identifier.issn0032-3861-
dc.identifier.uri10.1016/j.polymer.2013.08.057ko
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/11525-
dc.description.abstractUnsymmetrical and symmetrical diamine monomers containing trifluoromethyl groups, 2-trifluoromethyl-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 °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 °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 °C and in the range of 47.4-63.2 ppm/°C, respectively. Also, all of the synthesized polyimides have relatively low refractive indices (around 1.6) and birefringence (below 0.36).-
dc.publisherElsevier-
dc.titleSoluble polyimides with trifluoromethyl pendent groups-
dc.title.alternativeSoluble polyimides with trifluoromethyl pendent groups-
dc.typeArticle-
dc.citation.titlePolymer-
dc.citation.number21-
dc.citation.endPage5654-
dc.citation.startPage5648-
dc.citation.volume54-
dc.contributor.affiliatedAuthorIm Sik Chung-
dc.contributor.alternativeName김선달-
dc.contributor.alternativeName이상화-
dc.contributor.alternativeName허재원-
dc.contributor.alternativeName김상율-
dc.contributor.alternativeName정임식-
dc.identifier.bibliographicCitationPolymer, vol. 54, no. 21, pp. 5648-5654-
dc.identifier.doi10.1016/j.polymer.2013.08.057-
dc.subject.keywordHigh performance polymers-
dc.subject.keywordPolyimides-
dc.subject.keywordTrifluoromethyl groups-
dc.subject.localHigh performance polymers-
dc.subject.localhigh performance polymers-
dc.subject.localpolyimides-
dc.subject.localPolyimides-
dc.subject.localtrifluoromethyl groups-
dc.subject.localTrifluoromethyl group-
dc.subject.localtrifluoromethyl group-
dc.subject.localTrifluoromethyl groups-
dc.description.journalClassY-
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