Stress–Strain Dependence of Segmented Polyurethanes and Polyurethane Ureas

Abstract

The stress–strain dependences of segmented elastomers based on polyetherurethanes, polyesterurethane ureas, and polybutadieneurethane ureas were investigated. These dependences were adequately described using the generalized approach proposed earlier by the authors for amorphous elastomers. The experimental data obtained for four series of samples with chemical cross-linking confirmed an applicability of this approach for segmented elastomers. Unlike amorphous elastomers, the effective network density value was affected not only by the density of the chemical network, but the contribution of the network formed by the hard domains also needs be taken into account.

Keywords::

• elasticity
• elastomer
• mechanical behavior
• segmented polyurethane
• stress–strain plot

Funding

This work was financially supported by the Russian Fund for Basic Research (Project 13-03-00101 and Project 13-03-96000).