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Stability of MEH-PPV: Poly{[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene]vinylene} in solutions exposed to air in the dark and at daylight at laboratory temperature

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dc.title Stability of MEH-PPV: Poly{[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene]vinylene} in solutions exposed to air in the dark and at daylight at laboratory temperature en
dc.contributor.author Bondarev, Dmitrij
dc.contributor.author Trhlíková, Olga
dc.contributor.author Sedláček, Jan
dc.contributor.author Vohlídal, Jiří
dc.relation.ispartof Polymer Degradation and Stability
dc.identifier.issn 0141-3910 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2014
utb.relation.volume 110
dc.citation.spage 129
dc.citation.epage 136
dc.type article
dc.language.iso en
dc.publisher Elsevier, Ltd.
dc.identifier.doi 10.1016/j.polymdegradstab.2014.08.015
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0141391014003188
dc.subject Aging en
dc.subject Conjugated polymers en
dc.subject Daylight effect en
dc.subject Degradation en
dc.subject Solvent effect en
dc.description.abstract The long-term stability of poly{[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene]vinylene} (MEH-PPV) in solutions exposed to air at daylight and in the dark at room temperature has been studied using the size exclusion chromatography (SEC), UV/vis, fluorescence and IR spectra of aged samples, and comparison of UV/vis spectra of SEC fractions. Solvents currently used in the preparation, analysis and processing of MEH-PPV were used: tetrahydrofuran (THF), chloroform (CHCl3) and chlorobenzene (PhCl). The SEC-DAD data revealed a serious decrease in the delocalization of electrons in MEH-PPV chains, even in the large ones, which proves a deep damage to the structure of the chains prior to their cleavage. The IR spectra of aged samples show that the saturation of main-chain double bonds and the changes in the substitution of phenylene rings are the main chemical structure defects present in chains of aged MEH-PPV. The rate as well as the extent of the overall degradation process is ca ten to fifty times enhanced by the ordinary daylight. The rate of cleavage and the damage to the structure of MEH-PPV molecules are significantly influenced by the choice of the solvent; they increase in the order: PhCl < CHCl3< THF. PhCl can be recommended as one of the best solvents for MEH-PPV processing from solutions. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1003871
utb.identifier.obdid 43872029
utb.identifier.scopus 2-s2.0-84907258708
utb.identifier.wok 000347495700016
utb.identifier.coden PDSTD
utb.source j-scopus
dc.date.accessioned 2014-11-19T09:23:51Z
dc.date.available 2014-11-19T09:23:51Z
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Bondarev, Dmitrij
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