Acicular titania nanoparticles with average dimensions of 15 X 60 nm2 were produced by hydrothermal crystallization of TiOCl2. Titania particles were surface- functionalized with octadecylsilane to obtain an organophilic surface. High-density polyethylene (HDPE) nanocomposites were prepared by melt compounding with 2, 3, and 5 vol % concentrations of untreated and surface-functionalized titania nanoparticles. Quasi-static mechanical tensile tests evidenced slight increments of both the elastic modulus and stress at yield, which were accompanied by a marked reduction of the strain at break at high filler contents. The introduction of titania nanoparticles induced a substantial reduction of the creep compliance of the HDPE matrix and of its creep rate, especially at long loading times. Untreated titania nanoparticles were more effective in reducing the creep compliance than the functionalized ones.

Improving the creep stability of high-density polyethylene with acicular titania nanoparticles / F. Bondioli; A. Dorigato; P. Fabbri; M. Messori; A. Pegoretti. - In: JOURNAL OF APPLIED POLYMER SCIENCE. - ISSN 0021-8995. - ELETTRONICO. - 112(2):(2009), pp. 1045-1055. [10.1002/app.29472]

Improving the creep stability of high-density polyethylene with acicular titania nanoparticles

FABBRI, PAOLA;
2009

Abstract

Acicular titania nanoparticles with average dimensions of 15 X 60 nm2 were produced by hydrothermal crystallization of TiOCl2. Titania particles were surface- functionalized with octadecylsilane to obtain an organophilic surface. High-density polyethylene (HDPE) nanocomposites were prepared by melt compounding with 2, 3, and 5 vol % concentrations of untreated and surface-functionalized titania nanoparticles. Quasi-static mechanical tensile tests evidenced slight increments of both the elastic modulus and stress at yield, which were accompanied by a marked reduction of the strain at break at high filler contents. The introduction of titania nanoparticles induced a substantial reduction of the creep compliance of the HDPE matrix and of its creep rate, especially at long loading times. Untreated titania nanoparticles were more effective in reducing the creep compliance than the functionalized ones.
2009
Improving the creep stability of high-density polyethylene with acicular titania nanoparticles / F. Bondioli; A. Dorigato; P. Fabbri; M. Messori; A. Pegoretti. - In: JOURNAL OF APPLIED POLYMER SCIENCE. - ISSN 0021-8995. - ELETTRONICO. - 112(2):(2009), pp. 1045-1055. [10.1002/app.29472]
F. Bondioli; A. Dorigato; P. Fabbri; M. Messori; A. Pegoretti
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/474217
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