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dc.contributor.author
Wu, Jun
dc.contributor.author
Tomba, Juan Pablo
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dc.contributor.author
Winnik, Mitchell A.
dc.contributor.author
Farwaha, Rajeev
dc.contributor.author
Rademacher, Jude
dc.date.available
2020-03-05T21:53:18Z
dc.date.issued
2004-03
dc.identifier.citation
Wu, Jun; Tomba, Juan Pablo; Winnik, Mitchell A.; Farwaha, Rajeev; Rademacher, Jude; Temperature dependence of polymer diffusion in poly(vinyl acetate-co-dibutyl maleate) latex films; American Chemical Society; Macromolecules; 37; 6; 3-2004; 2299-2306
dc.identifier.issn
0024-9297
dc.identifier.uri
http://hdl.handle.net/11336/98895
dc.description.abstract
We describe polymer diffusion and its temperature dependence in poly(vinyl acetate-co-dibutyl maleate) [P(VAc-DBM)] latex films prepared from 4:1 w/w ratio of VAc:DBM. Two sets of polymers were investigated: one set containing 50% gel (high-M); the other set, with Mw ≈ 250000 (M250K), free of a measurable gel content. Despite their similar chemical compositions, as determined by 1H NMR, these two sets of samples exhibited different glass transition temperatures (Tg). Latex particles were labeled with 9-methacryloxymethylphenanthrene as the donor dye and 2′-acryloxy-4′-methyl-4-(N,N-dimethyl-amino)benzophenone as the acceptor. Polymer diffusion was monitored by nonradiative energy transfer (ET), and apparent diffusion coefficients (Dapp) were calculated from the ET data using a simple diffusion model. These values increased with temperature and were characterized by an apparent activation energy (Ea) of 37 ± 2 kcal/mol for the high-M polymer and 45 ± 2 kcal/mol for the M250K sample. Rheology measurements at different fixed temperatures were carried out to follow the response of the dynamic moduli (G′, G″) with respect to frequency (ω). A master curve based on the Williams-Landel-Ferry (WLF) equation could be constructed as a plot of shift factors vs 1/T, and shift factors for Dapp for both sets of polymers as well as for the G′, G″ values fell on the same curve. Thus, the difference in Ea values for the polymer diffusion can be ascribed to changes in the microscopic friction coefficient and the differences in Tg of the two sets of samples.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject.classification
Otras Ciencias Agrícolas
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Otras Ciencias Agrícolas
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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Otras Ingeniería de los Materiales
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Ingeniería de los Materiales
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INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Temperature dependence of polymer diffusion in poly(vinyl acetate-co-dibutyl maleate) latex films
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-01-30T14:58:31Z
dc.journal.volume
37
dc.journal.number
6
dc.journal.pagination
2299-2306
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Wu, Jun. University of Toronto; Canadá
dc.description.fil
Fil: Tomba, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
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Fil: Winnik, Mitchell A.. University of Toronto; Canadá
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Fil: Farwaha, Rajeev. Vinamul Polymers; Estados Unidos
dc.description.fil
Fil: Rademacher, Jude. Ici Paints; Estados Unidos
dc.journal.title
Macromolecules
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/ma030569v
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/ma030569v
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