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Effect of Clay Modification on the Mechanism of Local Deformations in PA6 Nanocomposites |
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| Authors: | Zita Dominkovics Elodie Naveau Christine Jérôme József Hári Károly Renner János Móczó Michaël Alexandre Béla Pukánszky |
| Affiliation: | 1. Laboratory of Plastics and Rubber Technology, Budapest University of Technology and Economics, H‐1521 Budapest, P. O. Box 91, Hungary;2. Institute of Materials Science and Environmental Chemistry, Research Center for Natural Sciences, Hungarian Academy of Sciences, H‐1525 Budapest, P. O. Box 17, Hungary;3. Center for Education and Research on Macromolecules (CERM), University of Liège, Sart‐Tilman, B6a, B‐4000 Liège, Belgium |
| 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.  |
| Keywords: | acoustic emission mechanical properties microdeformation nanocomposites structure |