Humidity Dependent Characterization of Polyamide (PA) Grades

Our customer needed the characterization of some polyamide (PA) grades. Our project partner was an experienced expert in material modeling and testing. He had already analyzed the use case and derived a test matrix.

Accordingly, performed strain controlled tensile tests, relaxation tests, cyclic tensile tests and bend tests. Also, we conditioned specimen humidity to two states representing standard and high humidity. During these tests, we conditioned the laboratory to standard conditions (23°C, 50% relative humidity). The time dependence was covered by before mentioned relaxation tests and tensile tests with three strain rates. We controlled and measured strain using 2 setups. One covered 0-100% of strain. The other covered 0-400% of strain. Additionally, we measured transverse strain.

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