Details
| Original language | English |
|---|---|
| Pages (from-to) | 703-712 |
| Number of pages | 10 |
| Journal | Reactive and Functional Polymers |
| Volume | 72 |
| Issue number | 10 |
| Early online date | 7 Jul 2012 |
| Publication status | Published - Oct 2012 |
Abstract
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 characterization proved that aluminium formed covalent bonds with polypropylene modified with maleic anhydride 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.
Keywords
- Aluminium nanoparticles, Hybrid nanocomposite, Inorganic alkoxides, Sol-gel process
ASJC Scopus subject areas
- Chemistry(all)
- Environmental Science(all)
- Environmental Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Chemical Engineering(all)
- Materials Science(all)
- Polymers and Plastics
- Materials Science(all)
- Materials Chemistry
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In: Reactive and Functional Polymers, Vol. 72, No. 10, 10.2012, p. 703-712.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Synthesis of aluminium nanoparticles in a PP matrix during melt processing
T2 - Effect of the alkoxide organic chain
AU - Oliveira, M.
AU - Nogueira, R.
AU - MacHado, A. V.
N1 - Funding Information: The authors acknowledge the Foundation for Science and Technology (FCT) Project SFRH/BD/39085/2007 for the financial support.
PY - 2012/10
Y1 - 2012/10
N2 - 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 characterization proved that aluminium formed covalent bonds with polypropylene modified with maleic anhydride 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.
AB - 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 characterization proved that aluminium formed covalent bonds with polypropylene modified with maleic anhydride 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.
KW - Aluminium nanoparticles
KW - Hybrid nanocomposite
KW - Inorganic alkoxides
KW - Sol-gel process
UR - http://www.scopus.com/inward/record.url?scp=84864406902&partnerID=8YFLogxK
U2 - 10.1016/j.reactfunctpolym.2012.06.022
DO - 10.1016/j.reactfunctpolym.2012.06.022
M3 - Article
AN - SCOPUS:84864406902
VL - 72
SP - 703
EP - 712
JO - Reactive and Functional Polymers
JF - Reactive and Functional Polymers
SN - 1381-5148
IS - 10
ER -