Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/26643

TitleNanocomposites prepared by reactive extrusion: effect of the polymer reactive groups
Author(s)Oliveira, Manuel
Machado, A. V.
Keywordspolymer nanocomposites
reactive extrusion
sol-gel reactions
Issue date2014
PublisherWiley
JournalMacromolecular Reaction Engineering
Abstract(s)The interest in the development of polymer nanocomposites by reactive extrusion has been growing in the past years. This work aims to investigate the effect of the polymer reactive groups on chemical reaction extension and consequently, on the morphology of the nanocomposites. For that, two polymers, polypropylene grafted with maleic anhydride (PP-g-MA) and ethylene vinyl acetate (EVA), are used as organic phases and aluminum isopropoxide (Al(Pr-i-O)3) as metal. Nanocomposites are prepared in the melt using sol–gel process. The reaction extension is assessed by FT-IR, rheological measurements, and crosslinking density determination. The dispersion of inorganic nanoparticles is analyzed by SEM and TEM, and EDS is used to identify the presence of metal nanoparticles. Even though, both reactions are successfully accomplished in the melt, the reaction with EVA presents lower reaction activation energy (Ea) and the prepared nanocomposite has a more crosslinked structure. Moreover, a finer morphology with well-dispersed nanoparticles containing aluminum .
TypeArticle
URIhttp://hdl.handle.net/1822/26643
DOI10.1002/mren.201300132
ISSN1862-832X
e-ISSN1862-8338
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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