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Effect of Clay Modification on the Mechanism of Local Deformations in PA6 Nanocomposites
Author(s) -
Dominkovics Zita,
Naveau Elodie,
Jérôme Christine,
Hári József,
Renner Károly,
Móczó János,
Alexandre Michaël,
Pukánszky Béla
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201200244
Subject(s) - materials science , montmorillonite , composite material , nanocomposite , deformation (meteorology) , silicate , composite number , matrix (chemical analysis) , deformation mechanism , sodium silicate , phosphonium , plasticity , chemical engineering , microstructure , polymer chemistry , engineering
Abstract PA nanocomposites are prepared from clays organophilized with a phosphonium and an ammonium salt, and sodium montmorillonite is used as reference. The analysis of mechanical and micromechanical properties of the composites reveal that several micromechanical deformation processes occur in the PA/MMT composites. The matrix cavitates at relatively small stress. Processes related to non‐exfoliated clay structural units are initiated at larger stresses. Sound is emitted mainly by the fracture of particles, but debonding may also occur. The plastic deformation of the matrix dominates at larger stresses and deformations. The various local deformations are independent of each other and composite properties are not determined by silicate related processes but by the deformation of the matrix.