Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/10455
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dc.contributor.authorKnaapila, M.-
dc.contributor.authorDias, F. B.-
dc.contributor.authorGaramus, V. M.-
dc.contributor.authorAlmásy, L.-
dc.contributor.authorTorkkeli, M.-
dc.contributor.authorLeppänen, K.-
dc.contributor.authorGalbrecht, F.-
dc.contributor.authorPreis, E.-
dc.contributor.authorBurrows, H. D.-
dc.contributor.authorScherf, U.-
dc.contributor.authorMonkman, A. P.-
dc.date.accessioned2009-07-02T09:05:13Z-
dc.date.available2009-07-02T09:05:13Z-
dc.date.issued2007-12-25-
dc.identifier.citationMacromolecules. 40:26 (2007) 9398-9405en_US
dc.identifier.issn0024-9297-
dc.identifier.urihttps://hdl.handle.net/10316/10455-
dc.description.abstractWe report on the phase behavior of poly(9,9-dihexylfluorene) (PF6), poly(9,9-diheptylfluorene) (PF7), poly(9,9-dioctylfluorene) (PF8), poly(9,9-dinonylfluorene) (PF9), and poly(9,9-didecylfluorene) (PF10) in methylcyclohexane (MCH). After a heating−cooling cycle, in the 10−50 mg/mL concentration range, PF6/MCH, PF7/MCH, PF8/MCH, and PF9/MCH systems were found to be gel-like, while PF10/MCH appears less viscous. PF6/MCH, PF7/MCH, PF8/MCH, and PF9/MCH form large (10−100 nm) sheetlike assemblies (thickness of 2−3 nm). The larger length scale structures of these sheets show an odd−even dependence on the side chain (spacer) length: the PF6 and PF8 sheets are broader and thinner, whereas PF7 and PF9 sheets are thicker with a putative double layer structure. PF10 does not follow this sequence, and only part of the polymer is assembled into a sheetlike structure, the rest remaining dissolved at the molecular level. PF8/MCH and PF9/MCH mixtures also have lower length scale crystalline structures with an internal period corresponding to the periodicity observed in the solid-state β phase of PF8. Vestiges of crystalline domains are found for PF6 and PF7 but not for PF10. PF7/MCH, PF8/MCH, and PF9/MCH systems contain the conformational isomer Cβ, of those chains observed in the β phase, while this is not observed with other polymer/MCH systems.en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsopenAccesseng
dc.titleInfluence of Side Chain Length on the Self-Assemblyen_US
dc.typearticleen_US
dc.identifier.doi10.1021/ma0715728-
uc.controloAutoridadeSim-
item.openairetypearticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.fulltextCom Texto completo-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-4114-9798-
crisitem.author.orcid0000-0003-3127-2298-
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais
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