The simulation of stress-strain curves for nanocomposites polyurethane/organoclay within the framework of fractals high-elasticity entropic theory

The deformation behavior of polyurethanes and nanocomposites on their basis, filled with organoclay, was studied within the frameworks of two concepts: classical and fractal entropic high-elasticity theories. It has been shown that studied rubber-like materials are satisfied to Gaussian statistics, but for them the incompressibility postulate is not fulfilled. Therefore for indicated elastomaterials it is impossible to apply classical entropic high-elasticity theory, since for its correct application the both mentioned above conditions simultaneous fulfillment is necessary. The correct description of both stress-strain curves and strength of considered polymer materials can be obtained within the frameworks of fractal entropic high-elasticity theory at the zero Poisson-s ratio condition. The alternative variant of deformation behaviour correct description gives the individual case of classical entropic high-elasticity theory - case of long polymer chains. The last variant application is defined by elastomaterials preparation method. An organoclay introduction results to stress enhancement at the same strains in three times.