Compatibilization effect of tio2 nanoparticles on the phase structure of PET/PP/TiO2 nanocomposites

Wenjing Li, J. Karger-Kocsis, Ralf Thomann

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

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 (PPg- 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.

Original languageEnglish
Pages (from-to)1616-1624
Number of pages9
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume47
Issue number16
DOIs
Publication statusPublished - Aug 15 2009

Fingerprint

Polyethylene Terephthalates
Compatibilizers
Polypropylenes
polyethylene terephthalate
Phase structure
polypropylene
Polyethylene terephthalates
Nanocomposites
nanocomposites
Nanoparticles
nanoparticles
Maleic Anhydrides
compounding
Maleic anhydride
anhydrides
Coalescence
coalescing
Free energy
Thermodynamic stability
free energy

Keywords

  • Compatibilization
  • Dispersion
  • Morphology
  • Nanocomposites

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Compatibilization effect of tio2 nanoparticles on the phase structure of PET/PP/TiO2 nanocomposites. / Li, Wenjing; Karger-Kocsis, J.; Thomann, Ralf.

In: Journal of Polymer Science, Part B: Polymer Physics, Vol. 47, No. 16, 15.08.2009, p. 1616-1624.

Research output: Contribution to journalArticle

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