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dc.contributor.authorEvingür, Gülşen Akin
dc.contributor.authorKaygusuz, Hakan
dc.contributor.authorErim, F. Bedia
dc.contributor.authorPekcan, Önder
dc.date.accessioned2019-06-27T08:02:52Z
dc.date.available2019-06-27T08:02:52Z
dc.date.issued2014
dc.identifier.issn0217-9792
dc.identifier.issn1793-6578
dc.identifier.urihttps://hdl.handle.net/20.500.12469/701
dc.identifier.urihttps://doi.org/10.1142/S0217979214501227
dc.description.abstractHybrid hydrogels are a new class of composite materials. Polyacrylamide (PAAm) hydrogels are mainly produced by free radical crosslinking copolymerization (FCC) of AAm in the presence of N N'-methylene bis (acrylamide) (BIS) as the crosslinker. Pyranine doped PAAm-poly (N-vinyl pyrrolidone) (PVP) composite were prepared with different amounts of PVP varying in the range between 0.0015 and 0.1 gr. It was observed that pyranine molecules as a fluoroprobe bind to AAm and PVP chains upon the initiation of the polymerization causing the fluorescence spectra of the bonded pyranines shift to the shorter wavelengths. The sol-gel phase transition and its universality were monitored and tested as a function of PVP contents. Observations around the critical point show that the gel fraction exponent beta agreed with the percolation result for below 0.025 gr PVP contents. However classical result was observed above 0.0125 gr PVP content.
dc.language.isoEnglish
dc.publisherWorld Scientific
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAcrylamide
dc.subjectPoly (N-vinyl pyrolidone)
dc.subjectComposite gel
dc.subjectPercolation
dc.subjectCritical phenomena
dc.subjectFluorescence
dc.titleGelation of PAAm-PVP composites: A fluorescence study
dc.typeArticle
dc.relation.journalInternational Journal of Modern Physics B
dc.identifier.issue20
dc.identifier.volume28
dc.identifier.wosWOS:000337807000002
dc.identifier.doi10.1142/S0217979214501227
dc.contributor.khasauthorPekcan, Önder


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