Characterisation of the dilatational stress relaxation for viscoelastic Polyurethane materials
Résumé
This contribution deals with three grades of polyurethane (PU) devoted to ensure sealing of filter cartridge endplate. PU is an amorphous polymer whose microstructure depends on the supplier processing. During service, the endplates are submitted to complex thermo-mechanical loading consisting of an applied pressure with a continuous increase of the temperature. The inner diametrical dilatation is the key parameter that has to be controlled. The main loading deals then with transient thermal expansion as well as hydrostatic pressure.
Domaines
Matériaux
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