Wpływ temperatury i szybkości rozciągania na wytrzymałość włókien poliestrowych o niskim stopniu orientacji

The modification of Zurkov equation widening the range of its application for materials characterized by strong flow during stretching is described in thes paper. For such materials the structural coefficient is stretching rate and temperature-dependent. This results in loss of material strenght with rise in streatching rate, when stretching rate reaches high value, and temperature dependence considerably greater than it is assumed by Zurkov. More over, the effect of intermolecular bounds on stress transfer in material, responsible for linear loss in activation energy of destruction with increase in temperature has been regarded. Taken into account. The analyses of Żurkov equation has been confirmed by data of measurements carried out on polyester fibres of small elongation.