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Rheological behavior of nanofibrillated cellulose/acrylic polymer nanocomposites: Effect of melt extrusion
Author(s) -
Besbes Iskander,
Magnin Albert,
Boufi Sami
Publication year - 2011
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.21232
Subject(s) - materials science , rheology , composite material , nanocomposite , viscoelasticity , extrusion , dynamic mechanical analysis , cellulose , casting , wood flour , polymer , chemical engineering , engineering
Abstract Nanocomposite films based on nanofibrillated cellulose (NFC) and acrylic latex were prepared by film casting and their melt rheology was investigated under dynamic conditions in both the linear and the nonlinear regimes. The addition of cellulose nanofiller increased the storage modulus G ′ and the dynamic viscosities η* of the nanocomposites monotonically, with NFC contents up to 6wt%. In addition, a transition from liquid‐like to solid‐like viscoelastic behavior was observed up to 1wt% of the added NFC with a terminal plateau in the low‐frequency range. This was explained in terms of the formation of an interconnected network involving the filler. After melt extrusion, a considerable change in the rheological properties was observed, with a major downward shift in the magnitude of G ′ vs. the frequencies along with an upward shift to higher strain in the linear viscoelastic range. Such a transition was attributed to the irreversible break‐down and disruption of the NFC network. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers