This volume includes the following analyses: factors regarding thermal and thermooxidative degradation of polyolefine nanocomposites, modelling of catalytic complexes in the oxidation reactions, modelling the kinetics of moisture adsorption by natural and synthetic polymers, new trends, achievements and developments on the effects of beam radiation, structural behaviour of composite materials, comparative evaluation of antioxidant properties, synthesis, properties and application of polymeric composites and nanocomposites, photodegradation and light stabilisation of polymers, wear resistant composite polymeric materials, some macrokinetic phenomena, transport phenomena in polymer matrixes, liquid crystals, flammability of polymeric materials and new flame retardants.