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Compatibilization effect of TiO₂ nanoparticles on the phase structure of PET/PP/TiO₂ nanocomposites

Journal of polymer science. Part B, Polymer physics, 2009-08, Vol.47 (16), p.1616-1624 [Peer Reviewed Journal]

Copyright © 2009 Wiley Periodicals, Inc. ;2009 INIST-CNRS ;ISSN: 0887-6266 ;ISSN: 1099-0488 ;EISSN: 1099-0488 ;DOI: 10.1002/polb.21752 ;CODEN: JPLPAY

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  • Title:
    Compatibilization effect of TiO₂ nanoparticles on the phase structure of PET/PP/TiO₂ nanocomposites
  • Author: Li, Wenjing ; Karger-Kocsis, József ; Thomann, Ralf
  • Subjects: Applied sciences ; Compatibility ; compatibilization ; Composites ; dispersion ; Droplets ; Exact sciences and technology ; Forms of application and semi-finished materials ; morphology ; Nanocomposites ; Nanoparticles ; Polyethylene terephthalates ; Polymer industry, paints, wood ; Polypropylenes ; Reproduction ; Technology of polymers ; Titanium dioxide ; Viscosity ratio
  • Is Part Of: Journal of polymer science. Part B, Polymer physics, 2009-08, Vol.47 (16), p.1616-1624
  • Description: Polyethylene terephthalate (PET)/Polypropylene (PP)/TiO₂ nanocomposites were prepared by compounding a PP/TiO₂ nanocomposite premix with PET in absence and presence (up to 6 vol %) of maleic anhydride grafted polypropylene (PP-g-MA). In absence of PP-g-MA, the TiO₂ nanoparticles were mainly located at the PET/PP interface and to a lesser extent in the dispersed PET droplets. As the TiO₂ nanoparticles were coated by polyalcohol their surface could react with PP-g-MA and thus improving the compatibilization with PP. Therefore in presence of PP-g-MA the TiO₂ nanoparticles were preferentially located in the PP. The incorporated TiO₂ nanoparticles exerted a compatibilization effect on the PET/PP blend. Depending on the location of TiO₂ three different compatibilization mechanisms were proposed to be at work: (1) Locating at the interface, the TiO₂ nanoparticles decrease the free energy of mixing, and thus increase the thermodynamic stability of the nanocomposites; (2) The TiO₂ nanoparticles at the interface also prevent the coalescence of PET droplets; (3) Preferentially located in the PP matrix, the TiO₂ nanoparticles decreased the viscosity ratio which facilitated the droplet breakup of PET.
  • Publisher: Hoboken: Wiley Subscription Services, Inc., A Wiley Company
  • Language: English
  • Identifier: ISSN: 0887-6266
    ISSN: 1099-0488
    EISSN: 1099-0488
    DOI: 10.1002/polb.21752
    CODEN: JPLPAY
  • Source: Alma/SFX Local Collection
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