B.Zh. Dzhangurazov, G.V. Kozlov, M.A. Mikitaev

The deformation mechanisms of nanocomposites polymer/organoclay with semicrystalline matrix were considered and their comparison with corresponding mechanisms for similar nanocomposites with amorphous glassy matrix was fulfilled. It has been shown that high (several hundreds per cents) strains up to fracture for the first type of indicated nanocomposites can be reached at expence of unfolding (straightening) of macromolecular sequences from crystallites with folded chains. A nanofiller contents increasing and accompanying it interfacial regions fraction enhancement are blockaded this mechanism, rising simultaneously nanocomposite elasticity modulus, and then these polymeric materials deformation realizes only at expence of stretching of chains between local order domains (clusters) in amorphous phase, as and for nanocomposites with amorphous glassy matrix, that results to deformability resource sharp reduction. Therefore, the definite balance exists between reinforcement (elasticity modulus increasing) and plasticity of nanocomposites. The quantitative estimations of limiting magnitudes of both reinforcement degree and strain up to fracture of nanocomposites polymer/organoclay were fulfilled, which correspond well to experimental results.