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 -