Thermal and thermomechanical behavior of polymers

Thermal and thermomechanical behavior of polymers

Polymers filled with conductive particles

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Composites have been prepared based on polymers (epoxy, silicone, and polyurethane) and metal powders (Co and Ni). The composition and the quality of these materials were characterized by densimetry and microscopies (optical and electronic). The study of the variation in electrical resistivity as a function of the volume percentage of the load was carried out in direct current. The electrical resistivity decreases drastically when the percentage of the load increases and in the vicinity of a certain critical concentration (conduction threshold), a sudden drop was observed corresponding to the ...