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Rheology of bitumen modified by EVA—Organoclay nanocomposites
Author(s) -
Markanday Subramanian Sureshkumar,
Stastna Jiri,
Polacco Giovanni,
Filippi Sara,
Kazatchkov Igor,
Zanzotto Ludovit
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32373
Subject(s) - organoclay , materials science , rheology , nanocomposite , composite material , creep , ethylene vinyl acetate , mixing (physics) , phase (matter) , ternary operation , polymer , copolymer , chemistry , organic chemistry , physics , quantum mechanics , computer science , programming language
Abstract Ternary systems, bitumen/ethylene‐vinyl acetate (EVA)/organoclay, were prepared by two mixing methods (physical mixing and melt blending) and then studied in small amplitude oscillations, start‐up of shear flow and repeated creep and recovery tests. The effect of mixing method and the role of two organoclays on the rheological properties of the studied systems were investigated. Improved thermomechanical properties of bitumen/EVA/organoclay nanocomposites, prepared by melt blending, were demonstrated by the low accumulated strain/compliance in the repeated creep and recovery tests. Structural differences between the studied systems were reflected in the behavior of the dynamic phase angle, specifically in the shape of the derivative of phase angle w.r.t. the reduced frequency. Similarly, the structural differences between the prepared nanocomposites were reflected by the behavior of the stress growth function η + in the transient experiments. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010