The work aims at establishing the influence of a change in vulcanisation characteristics (crosslinking degree) on mechanical properties of elastomeric materials. The theoretical part is concerned with vulcanisation and vulcanisation methods, measurement of mechanical properties of hyperelastic materials and also composition of rubber compounds. The experimental part analyses the measuring methods used and presents the values obtained. The work confirmed quite unequivocally the expected effect of the vulcanisation degree on mechanical properties of elastomeric materials.