Аннотация:Annotation. In this study, a dynamic method was used to study the physical and mechanicalcharacteristics of materials in the mode of freely damped torsional vibrations. This research methodconsiders materials with model representations of the atomic-molecular structure. In the work wewill use rosin grade A and tallow rosin. An increase in the frequency of the oscillatory processexcited in the system under study with an increase in the temperature of this system wasexperimentally discovered in studies of internal friction in segmental and segmentoelastics. For adissipative process associated with a phase transition on the spectrum of internal friction, a losspeak (phase mechanism) is observed; and an abnormal increase in the frequency of the oscillatoryprocess.This significantly distinguishes the phase mechanism of internal friction from relaxation, forwhich an anomalous decrease in the frequency of the oscillatory process is observed in thetemperature range of the manifestation of the dissipative process in the spectrum of internal friction.