Poly(arylene ether)s with low refractive indices: poly(biphenylene oxide)s with trifluoromethyl pendant groups via a meta-activated nitro displacement reaction

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dc.contributor.authorS D Kim-
dc.contributor.authorD Ka-
dc.contributor.authorIm Sik Chung-
dc.contributor.authorS Y Kim-
dc.date.accessioned2017-04-19T09:29:28Z-
dc.date.available2017-04-19T09:29:28Z-
dc.date.issued2012-
dc.identifier.issn00249297-
dc.identifier.uri10.1021/ma2028209ko
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/10655-
dc.description.abstractHigh-molecular-weight poly(biphenylene oxide)s (PBPO) were prepared from AB-type monomers, 4′(3′)-hydroxy-4-nitro-2,6-bis(trifluoromethyl) biphenyl, through a meta-activated nitro displacement reaction. The displacement of nitro leaving group activated by the two trifluoromethyl groups at the meta-position produced high-molecular-weight polymers, which implies that nucleophilic aromatic substitution reaction of the nitro leaving group proceeded very effectively with two activating groups at the meta-position. The obtained polymers have weight-average molecular weight of 20 800-143 300 g/mol and molecular weight distribution of 1.68-2.85. While two homopolymers of 4′- or 3′-hydroxy-4-nitro-2,6-bis(trifluoromethyl)biphenyl, p-PBPO and m-PBPO, showed a semicrystalline morphology, copolymers of the two monomers were amorphous and dissolved in a wide range of organic solvents. The PBPOs possessed a high glass transition temperature (T g) in the range of 169 to 208 °C depending on their structure and high thermal stability with 10% weight loss temperatures from 486 to 542 °C in nitrogen and from 465 to 516 °C in air. Moreover, PBPOs containing two trifluoromethyl groups showed low refractive indices in the range of 1.4979-1.5052 as well as low birefringence values of 0.0095-0.0148.-
dc.publisherAmer Chem Soc-
dc.titlePoly(arylene ether)s with low refractive indices: poly(biphenylene oxide)s with trifluoromethyl pendant groups via a meta-activated nitro displacement reaction-
dc.title.alternativePoly(arylene ether)s with low refractive indices: poly(biphenylene oxide)s with trifluoromethyl pendant groups via a meta-activated nitro displacement reaction-
dc.typeArticle-
dc.citation.titleMacromolecules-
dc.citation.number7-
dc.citation.endPage3031-
dc.citation.startPage3023-
dc.citation.volume45-
dc.contributor.alternativeName김선달-
dc.contributor.alternativeName가두연-
dc.contributor.alternativeName정임식-
dc.contributor.alternativeName김상율-
dc.identifier.bibliographicCitationMacromolecules, vol. 45, no. 7, pp. 3023-3031-
dc.identifier.doi10.1021/ma2028209-
dc.description.journalClassY-
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