It was shown that if the time elapsed to the formation of a neck is taken as the criterion of the time-to-rupture of plastics, the latter property obeys the Aleksandrov-Gurevich equation for the relaxation time corrected for the pole displacement: $$\Theta = \Theta _0 \exp \left( {\frac{{U'_0 - \gamma '\sigma }}{R}} \right)\left( {\frac{1}{T} - \frac{1}{{T_{pol} }}} \right).$$