Evolution of dispersion along the extruder during the manufacture of polymer-organoclay nanocomposites

doi:10.1016/j.ces.2013.05.004

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/26837

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Campo DC	Valor	Idioma
dc.contributor.author	Barbas, J. M.	-
dc.contributor.author	Machado, A. V.	-
dc.contributor.author	Covas, J. A.	-
dc.date.accessioned	2013-12-09T15:55:24Z	-
dc.date.available	2013-12-09T15:55:24Z	-
dc.date.issued	2013	-
dc.identifier.issn	0009-2509	por
dc.identifier.uri	https://hdl.handle.net/1822/26837	-
dc.description.abstract	Although correlationsbetweenthe final dispersionleveloforganoclaynanocompositesandmeltmixing conditions inatwinscrewextruderhavebeenproposed,theactuallengthwiseevolutionofdispersionin these machinesisstillnotwellunderstood.Despitetheirpracticalimportancesuchstudiesaredifficult, due tothepossibilityofinducingdegradationand/ormorphologychangesduringmaterialcollection and/or samplepreparation.Thisworkuseson-linerheometryandin-linenear-infraredspectroscopy (NIR) tomonitortheevolutionofdispersionofaPP/PP-g-MA/organoclaysystemalongtheaxisoftwin screwextruder.Regardlessofthescrewprofile utilised,dispersiondevelopsquicklyinthe first partofthe machine, andthenitlevels-offordecreases,evenifthe final dispersionlevelsaresignificant. Inorderto validatethisdata,ScanningTransmittedElectronMicroscopy(STEM),X-raydiffraction(XRD)andmid- FT-IRanalysesarecarriedoutonsamplescollectedfromthesamelocationswheretheon-line/in-line measurements wereperformed.Theresultsconfirmed thepreviousmeasurements.Thermogravimetric analysis(TGA)andTimeofFlight-SecondaryIonMassSpectrometry(TOF-SIMS)onclay,matrixand nanocomposite showedthatthermaldegradationoftheclaysurfactantandofthepolymermatrixcould contribute totheobserveddispersionreversal.	eng
dc.language.iso	eng	por
dc.publisher	Elsevier 1	por
dc.rights	restrictedAccess	por
dc.subject	On-line monitoring	por
dc.subject	Rheology	por
dc.subject	Near-infraredspectroscopy	por
dc.subject	Polymer nanocomposites	por
dc.title	Evolution of dispersion along the extruder during the manufacture of polymer-organoclay nanocomposites	por
dc.type	article	-
dc.peerreviewed	yes	por
dc.relation.publisherversion	http://www.journals.elsevier.com/	por
sdum.publicationstatus	published	por
oaire.citationStartPage	77	por
oaire.citationEndPage	87	por
oaire.citationTitle	Chemical Engineering Science	por
oaire.citationVolume	98	por
dc.identifier.doi	10.1016/j.ces.2013.05.004	por
dc.subject.wos	Science & Technology	por
sdum.journal	Chemical Engineering Science	por
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