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Publication :
Correlation between the plasma characteristics and the surface ‎chemistry of plasma-treated polymers through partial least ‎squares analysis

bul.description.provenancenag spbfr
bul.rights.dateAccepPubl2013-12-06fr
bul.rights.periodeEmbargoP1Yfr
bul.rights.typeDatedatePublicationfr
dc.contributor.authorTurgeon, Stéphane
dc.contributor.authorDuchesne, Carl
dc.contributor.authorGhasemzadeh-Barvarz, Massoud
dc.contributor.authorLaroche, Gaétan
dc.contributor.authorMavadat, Maryam
dc.date.accessioned2019-07-19T17:57:51Z
dc.date.available2019-07-19T17:57:51Z
dc.date.issued2013-12-06
dc.description.abstractWe investigated the effect of various plasma parameters (relative density of atomic N and H, plasma temperature, and vibrational temperature) and process conditions (pressure and H2/(N2 + H2) ratio) on the chemical composition of modified poly(tetrafluoroethylene) (PTFE). The plasma parameters were measured by means of near-infrared (NIR) and UV-visible emission spectroscopy with and without actinometry. The process conditions of the N2-H2 microwave discharges were set at various pressures ranging from 100 to 2000 mTorr and H2/(N2+H2) gas mixture ratios between 0 and 0.4. The surface chemical composition of the modified polymers was determined by X-ray photoelectron spectroscopy (XPS). A mathematical model was constructed using the partial least-squares regression algorithm to correlate the plasma information (process condition and plasma parameters as determined by emission spectroscopy) with the modified surface characteristics. To construct the model, a set of data input variables containing process conditions and plasma parameters were generated, as well as a response matrix containing the surface composition of the polymer. This model was used to predict the composition of PTFE surfaces subjected to N2-H2 plasma treatment. Contrary to what is generally accepted in the literature, the present data demonstrate that hydrogen is not directly involved in the defluorination of the surface but rather produces atomic nitrogen and/or NH radicals that are shown to be at the origin of fluorine atom removal from the polymer surface. The results show that process conditions alone do not suffice in predicting the surface chemical composition and that the plasma characteristics, which cannot be easily correlated with these conditions, should be considered. Process optimization and control would benefit from plasma diagnostics, particularly infrared emission spectroscopy.fr
dc.identifier.doi10.1021/la403822afr
dc.identifier.issn15205827fr
dc.identifier.pubmed24313888fr
dc.identifier.urihttp://hdl.handle.net/20.500.11794/35541
dc.languageengfr
dc.publisherACS Publicationsfr
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.subject.rvmPlasma (Gaz ionisés)fr
dc.subject.rvmMoindres carrésfr
dc.subject.rvmChimie des surfacesfr
dc.subject.rvmPolymèresfr
dc.titleCorrelation between the plasma characteristics and the surface ‎chemistry of plasma-treated polymers through partial least ‎squares analysisfr
dc.typearticle de recherche
dc.type.legacyCOAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherchefr
dcterms.bibliographicCitationLangmuir : the ACS journal of surfaces and colloids, Vol. 29 (51), 15859 -15867(2013)fr
dspace.accessstatus.time2024-03-25 18:05:18
dspace.entity.typePublication
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relation.isAuthorOfPublication.latestForDiscovery132a8f06-2342-45fd-9569-9002ba012c57
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rioxxterms.project.funder-nameNatural Sciences and Engineering Research Council of Canadafr
rioxxterms.project.funder-nameCentre Québécois sur les Matériaux Fonctionnels (CQMF)fr
rioxxterms.versionAccepted Manuscript (AM)fr
rioxxterms.version-of-recordhttps://doi.org/10.1021/la403822afr

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