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Estimation of the Thickness Dependence of the Glass Transition Temperature in Various Thin Polymer Films

DC Field Value Language
dc.contributor.authorKim, Jae Hyun-
dc.contributor.authorJang, Jyongsik-
dc.contributor.authorZin, Wang-Cheol-
dc.date.accessioned2010-03-25T01:42:05Z-
dc.date.available2010-03-25T01:42:05Z-
dc.date.issued2000-
dc.identifier.citationLangmuir 2000, 16, 4064-4067en
dc.identifier.issn0743-7463-
dc.identifier.urihttps://hdl.handle.net/10371/61967-
dc.description.abstractThe glass transition temperature (Tg) in the thin poly(R-methyl styrene) and polysufone films that are
coated on the surface of a Si wafer is investigated in this paper. A novel equation was suggested to estimate
the thickness dependence of Tg in thin films. Ellipsometry has been used to measure Tg of various thin
films as functions of sample thickness, molecular weight, and kind of polymer. One adjustable parameter
in the equation, i.e., ê, was obtained from fitting this function with the experimentally measured Tg. The
magnitude of the fitted parameter ê showed discrepancies between the polymer types but similarity between
the molecular weights. This parameter ê corresponded to the statistical segment length of the polymer.
All the measured Tg data of the investigated polymers were superimposed in one curve by normalizing
the thickness and the measured Tg with the parameter ê and bulk Tg, respectively. The origin of Tg
depression phenomena in thin films was closely correlated with its segmental length and not with whole
chain size.
en
dc.description.sponsorshipDiscussions with Dr. Doros N.
Theodorou and Dr. Richard Jones have contributed greatly
to this paper. This research has been supported by the
Research Institute of Engineering Science (RIES), by
Center for Advanced Functional Polymers, and by the
Korea Research Foundation (1998-017-E00211), and the
authors gratefully acknowledge the support from these
organizations.
en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.titleEstimation of the Thickness Dependence of the Glass Transition Temperature in Various Thin Polymer Filmsen
dc.typeArticleen
dc.contributor.AlternativeAuthor김재현-
dc.contributor.AlternativeAuthor장정식-
dc.contributor.AlternativeAuthor진왕철-
dc.identifier.doi10.1021/la991618t-
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