Mechanical and relaxation properties of γ-irradiated PVA doped with ferrous sulphate
1999
Abstract Films of pure poly(vinyl alcohol) (PVA) and samples doped with different concentrations of heptahydrated ferrous sulphate were prepared using a casting method. Mechanical and relaxation properties were measured before and after irradiation. The modulus of elasticity, yield strength, tensile strength ductility and relaxation time were produced from true stress–true strain and stress relaxation measurements. The measured parameters were found to be dependent on both FeSO 4 concentration and on γ -doses. A cyclic effect occurs. ©
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