Caractérisation Et Etude Des Propriétés Physiques Des Composites Bentoniteacrylamide [bcam].

Résumé: The present subject thesis consists of the development of nano composite materials based on bentonite and acrylamide. Indeed, the properties of clay are widely studied and are of interest for many applications. On the other hand, the properties of acrylamide are known and polyacrylamides are widely used in various fields. The pooling of these two materials results in composite materials with new physical and chemical properties that are closely dependent on the chemical structure of the new material. Our aim objectif is to obtain via a new technique of polymerization a series of polymers based on acrylamide and bentonite with different ration in weight (PAM/BC 1) (PAM/BC 3) (PAM/BC 5) (PAM/BC 10) (PAM/BC 25) (PAM/BC 50) using the adiabatic process and radicalar route of polymerisation. These polymers were perfectly characterized by XRD scan, SEM microscopy, DSC analysis, micro indentation tests and nanoindentation measurements. At first in order to study the effect of nanstructure in the PAM/BC properties, The percentage by weight of bleaching clay (BC) was fixed at 1%, 3% and 5%. Thin films were obtained using an evaporation solution (thickness of films were in the range 100- 300 micrometer). In seconde time we fixed the rate of BC at10%,25%,50% and results obtained are discussed in chapter IV. Influence of time indentation and load applied on the mechanical behavior results reveal an important response of ou materials elaborated.

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