Rheological behaviour of acrylate/montmorillonite nanocomposite latexes and their application in leather finishing as binders
Articles > Article · 2010
Authors: Onur YILMAZ, Catalina N. CHEABURU, GÜRBÜZ GÜLÜMSER, Cornelia VASILE
Progress in Organic Coatings, Journal Indexed in SCI Expanded, International, WoS, 2010, vol 70, pp 52-58
DOI: 10.1016/j.porgcoat.2010.10.001
Summary
The paper describes the theological behaviour of nanocomposite latexes based on butylacrylate-co-methylmethacrylate-co-acrylamide terpolymers including various commercial nanoclays obtained via in situ emulsion polymerization. Rotational, oscillatory, emulsion stability and thixotropy tests (recovery) were performed to evaluate the influence of clay incorporation, type of clay and also emulsifier content in the composition of these nanomaterials. It was observed that the viscosities of the nanocomposite latexes were increased by clay incorporation at low shear rates, while a shear thinning effect was observed at higher shear rates. Oscillatory tests indicated a dominant elastic behaviour and high physical stabilities for all the nanocomposites. The hydrophobic character of the clay and emulsifier content also influenced the viscosity and dynamic modulus of the emulsions.