Low-Temperature Sealing Force Behaviour of Fkm Elastomers as a Function of the Degree of Chemical Crosslinking and Differently Restricted Geometric Deformation in Static Compression

Abstract

Selected from International Polymer Science and Technology, 42, No. 10, 2015, reference GK 15/08/548; transl. serial no. 17441 Translated by M. GrangeThis publication first addresses the influence of an increasing chemical network density on the static sealing force behaviour and internal structural mobility of an FKM material in the cold. Cylindrical FKM test specimens were exposed to a high static surface pressure to make it easier to see thermodynamic and immobilising influences on sealing force behaviour as a function of chemical network density. Additional volume swelling trials and PVT measurements focused particularly on the compressible behaviour of the elastomer material as a function of its chemical network density. Furthermore -based on the static sealing force behaviour and mobility of the material in the cold -the loading situation of free compression with distortional strain energy was compared with the extreme case of a completely confined elastomer seal. The completely confined elastomer material was exposed to pure compression work, as in the PVT measurements.