Publication:
Anomalous dilute solution properties of segmented polydimethylsiloxane-polyurea copolymers in isopropyl alcohol

dc.contributor.coauthorWard, Thomas C.
dc.contributor.departmentDepartment of Chemistry
dc.contributor.kuauthorGökçümen, Güneş Ekin Atilla
dc.contributor.kuauthorYılgör, Emel
dc.contributor.kuauthorYılgör, İskender
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.date.accessioned2024-11-09T22:45:26Z
dc.date.issued2006
dc.description.abstractPreliminary characterization of amphiphilic segmented copolymers of polydimethylsiloxane and urea 'hard blocks' was conducted by measuring isopropyl alcohol (primarily) dilute solution viscosities via capillary viscometry. The traditional data analysis techniques, which provide for extrapolation of intrinsic viscosities from these experiments, revealed that increasing concentrations of polymer produced lower reduced viscosities rather than the expected higher values. A very approximate data fit reveals negative Huggins and Kraemer constants from these analyses, which are highly unusual. In a solvent such as DMF, a similar polymer having poly(tetramethylene oxide) and urea blocks and measured with identical conditions exhibited the expected behavior, showing increasing reduced viscosities over concentrations in the same range. However, the non-linearity of the data is suggestive of much more complex hydrodynamic, or supramolecular, interactions that are not clarified by the initial research.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue4
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.volume47
dc.identifier.doi10.1016/j.polymer.2005.12.008
dc.identifier.eissn1873-2291
dc.identifier.issn0032-3861
dc.identifier.quartileQ1
dc.identifier.scopus2-s2.0-32044434231
dc.identifier.urihttps://doi.org/10.1016/j.polymer.2005.12.008
dc.identifier.urihttps://hdl.handle.net/20.500.14288/6077
dc.identifier.wos235522900029
dc.keywordsViscosity
dc.keywordsSilicone-urea
dc.keywordsSupramolecular
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofPolymer
dc.subjectPolymers
dc.subjectPolymerization
dc.titleAnomalous dilute solution properties of segmented polydimethylsiloxane-polyurea copolymers in isopropyl alcohol
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorYılgör, İskender
local.contributor.kuauthorYılgör, Emel
local.contributor.kuauthorGökçümen, Güneş Ekin Atilla
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
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relation.isOrgUnitOfPublication.latestForDiscovery035d8150-86c9-4107-af16-a6f0a4d538eb
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