Thermomechanical analysis of polyurethane composite with shape memory effect used for create deployable space design structures

The possibility of using a three-point bending clamp thermomechanical analyzer for study the shape memory effect of a constructional polyurethane composite is investigated. The viscoelastic properties of the sample in the region of the transition from the glassy to the highly elastic state are studied. The parameters affecting the recovery rate of the original form $(R_r)$ and the fixation factor of the temporary form $(R_f)$ are determined. The conditions for deforming and cooling the polyurethane composite are established, which allow to achieve the values of $R_{r}$ = 99.98% and $R_{f}$ = 99.70%.