Investigating the effect of natural ageing on the specific heat of metal-filled polyvinyl butyral

摘要

An examination is made of the effect of ageing on the specific heat of metal-filled polyvinyl butyral, the structure of which is formed in the temperature and pressure regime of pressing at elevated pressures. The search for optimum processing parameters and the programming of the properties of polymer systems during their processing are among the urgent avenues of scientific research [1, 2]. External parameters act upon the formed polymer system with known prehistory and properties, such as solar radiation, especially its shortwave part, temperature, moisture, oxygen, etc. In polymer systems, physicochemical processes ensue that lead to an irreversible change in their structure and properties. Therefore, investigations of the change in properties during natural ageing of polymer systems are important from a theoretical and from a practical viewpoint [3, 4].