Overview
ABSTRACT
The surface characteristics of polymers strongly influence their use properties, in both bulk parts and polymeric coatings of ranging thickness. The article first presents the characterization of mechanical properties by nanoindentation: classical measurement of hardness and Young’s modulus. It goes on to look at the methods used for a finer characterization of the surface rheology (flow stress and viscoelasticity). It then describes polymer behavior in tests of interaction with another solid: adherence test between a ball and a plane, and scratch test. Lastly it presents the tribological properties of polymers (friction and wear).
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Read the articleAUTHORS
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Évelyne DARQUE-CERETTI: PhD, Senior Researcher, MINES ParisTech, PSL – Research University, CEMEF – Centre de mise en forme des matériaux, CNRS UMR 7635, Sophia Antipolis France
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Éric FELDER: PhD, Senior Researcher, MINES ParisTech, PSL – Research University, CEMEF – Centre de mise en forme des matériaux, CNRS UMR 7635, Sophia Antipolis France
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Bernard MONASSE: PhD, Senior Researcher, MINES ParisTech, PSL – Research University, CEMEF – Centre de mise en forme des matériaux, CNRS UMR 7635, Sophia Antipolis France
INTRODUCTION
The surface properties of a material are always of great importance, both scientifically and in terms of practical applications. These properties are extremely varied: thermodynamic, physicochemical, optical, geometric (roughness), mechanical.... They are a direct consequence of the material's history (production, shaping) and often differ from its volume properties. This is particularly important in the case of polymers, which are less dense, less hard, more flexible and more sensitive to the environment than metal alloys. Furthermore, to control the aesthetic appearance and surface properties of parts, polymer coatings of varying thicknesses are increasingly used in the mechanical, automotive, optical and food industries.... Their mechanical characteristics determine their behavior in the face of mechanical aggression (resistance to impact, to the formation of pronounced scratches, adhesion to another material) and when sliding on a counterpart part: intensity of friction, modes and speed of wear.
The article
This article presents the mechanical and tribological properties.
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KEYWORDS
friction | wear | surface rheology | adhesive bonding | coatings formulation | surface treatments | dry bearing
CAN BE ALSO FOUND IN:
Study and analysis of solid polymer surfaces
Surface mechanical properties
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"Plastics and composites"
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