Thermomechanical studies of the dependence of deformation (ϵ) on time (t) and temperature (T) for various static stresses in polyimide under uniaxial tension were carried out. Temporal deformation curves for static stresses in the range from 75 to 110 MPa consist of two stages: 1 - increase; 2 - exit to saturation, which is associated with a change in the nature of structural transformations of macromolecules, due to the action of the static stresses. An increase in temperature and voltage leads to an increase in the dependence ϵ (T). This is due to the intensification of the processes of structuring macromolecules with increasing temperature and are supplemented by processes of breaking bonds between macromolecules, which increase the strain rate. Experimental data are described in terms of exponential and linear models.
|Журнал||IOP Conference Series: Materials Science and Engineering|
|Состояние||Опубликовано - 7 фев 2020|
|Событие||8th International Conference for Young Scientists on High Technology: Research and Applications, HTRA 2019 - Tomsk, Российская Федерация|
Продолжительность: 30 сен 2019 → 5 окт 2019
ASJC Scopus subject areas
- Materials Science(all)