Stiffness

General information

The high level of variation that can be achieved in polyurethane chemistry makes it possible to produce Desmopan® with a very wide range of Young’s moduli.

The graphic shows the Young’s modulus range for TPU and RTPU compared to the range for other materials.

The Young’s modulus (modulus of elasticity) is established from the tensile test to DIN 53504 on an S1 specimen to DIN EN ISO 3167, employing a testing rate of 2 mm/min. The Young’s modulus is calculated as the ratio of stress to strain from the initial gradient of the stress-strain curve.

In the case of plastics, the Young’s modulus has been seen to be dependent on the following parameters:

Stiffness as a function of temperature

The dependence on temperature is shown in the following diagrams on the basis of different raw materials and hardnesses.