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TitleSynthesis of aluminium nanoparticles in a PP matrix during melt processing : effect of the alkoxide organic chain
Author(s)Oliveira, M.
Nogueira, R.
Machado, A. V.
KeywordsHybrid nanocomposite
Aluminium nanoparticles
Inorganic alkoxides
Sol-gel process
Issue date2012
JournalReactive and Functional Polymers
Abstract(s)The synthesis of aluminium nanoparticles in a polypropylene (PP) matrix by a sol–gel process in the melt was investigated. The study was performed using two aluminium precursors, aluminium isopropoxide and aluminium acetylacetonate, to assess the effect of the stereochemical hindrance of the precursor organic groups on reactivity. The hybrid nanocomposites were prepared in a batch mixer under constant processing conditions and characterized by several techniques. Chemical and morphological character- ization proved that aluminium formed covalent bonds with polypropylene modified with maleic anhy- dride and the presence of aluminium nanoparticles. Moreover, TEM micrographs of both nanocomposites synthesised revealed a lower amount of nanoparticles when aluminium acetylacetonate was used. The values of the activation energy determined explained the higher reactivity of aluminium isopropoxide. The reaction mechanisms were proposed for both precursors.
AccessRestricted access (UMinho)
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
IPC - Artigos em revistas científicas internacionais com arbitragem

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