Ageing and stabilization of polymers is a large section of the polymeric materials science - the science of creating polymeric materials, processing, conservation and management of their operational properties. Aging of polymers - a complex set of chemical and physical processes occurring under the influence of the environment, their processing, use, and storage, resulting in an irreversible or reversible changes (deterioration) properties of polymers. Often, instead of the term «aging» used the term «destruction» (sometimes «degradation»). Physical aging processes are reversible. They do not lead to rupture of polymer chains, or crosslinked. As an example, the processes of crystallization, recrystallization or unwanted intrusion into the polymer solvent to cause intergranular corrosion (lubricant) and lead to the deterioration of mechanical properties of polymer articles. Chemical aging processes are irreversible. They lead to the rupture of chemical bonds, and sometimes to the crosslinking of the macromolecules, the chemical structure change, decrease or increase in the molecular weight of the polymer. Very important task is quantitative prediction resistance of polymer products. If time is underestimated reliable operation, the plastic parts are taken out of service before their resources are exhausted and it is uneconomical. If the operating time will be inflated, the polymeric product fail during operation, which may lead to an accident or even more serious consequences.

thermal gravimetric analysis, polymer activation energy lifetime.