Frost Resistance of Porous Elastomer Materials Based on Fluorine Rubbers

Abstract

The experimental results of the study on the frost resistance of porous elastomeric materials based on fluorinated rubbers are presented. As pore-forming agents, supercritical carbon dioxide (SC-CO2) and azodicarbonamide (ADA) were used. To study the low-temperature properties of the elastomeric materials, dynamic mechanical analysis was employed. It is shown that the formation of porous structures in elastomeric materials based on fluoroelastomers leads to an improvement in their frost resistance both in static and dynamic deformation modes. The greatest effect of lowering the glass transition temperature is achieved for porous materials with isolated pores. The decrease in the glass transition temperature of porous elastomeric materials is associated with an increase in the elastic component during deformation due to the presence of isolated gas bubbles and a change in the type of material deformation.