1. A large range of mechanical properties

2. Elastic properties

3. Elastic return

4. Fatigue resistance

5. Outstanding properties at low temperature

6. Dynamic Mechanical Analysis (DMA)

4. Fatigue resistance

The behavior of a material under cyclic or repeated solicitation, with fixed or random intensity, is properly defined as the property of fatigue.
It can be studied under different aspects :

• By varying the amplitude of the applied solicitation
• By varying the solicitation mode: tensile, flexural, torsion, compression

One of the intrinsic qualities of pebax^® is it’s ability to dissipate an exceptionally small amount of energy by heat dissipation when compared to other thermoplastic elastomers. It’s low hysteresis value leads to low self-heating of the material under repeated solicitations. As a result, Pebax^® is poorly sensitive to degradation under fatigue tests.

4.1 Ross Flex Test

A test frequently used to determine the fatigue resistance of pebax^® is the Ross Flex test. It consists of applying a 90° angle flexion to a bar, fixed on one of its extremities. The test is performed under a 1.7 Hz frequency and the evaluation of the damage caused to the material is made visually by observing the material at a given number of cycles. This test can be performed at various temperatures. Contrary to other thermoplastic elastomers, pebax^® offers excellent resistance to alternate flexural solicitations at room and low temperatures. The standard used to perform this test is ASTM D1052.