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Updated: Dec 22, 2025

Disentangling High Strength Copolymer Aramid Fibers to Enable the Determination of Their Mechanical Properties
Published on: September 1, 2018
Mechanical properties of amorphous and semi-crystalline semi-aromatic polyamides
Stéphanie Djukic1, Anthony Bocahut2, Jérôme Bikard2
1LPMA, Laboratoire des Polymères et Matériaux Avancés, UMR 5268 Solvay/CNRS, Solvay in Axel'One, 87 avenue des Frères Perret CS 70061 69192 St-Fons Cedex, France.
Abstract:
We investigate the mechanical properties of amorphous and semi-crystalline semi-aromatic polyamides, polyphthalamides (PPA). Three relaxation processes have been identified by DMTA which is consistent with literature for polyamide. PPA exhibit a brittle-to-ductile transition from a low impact strength to a high impact strength. At room temperature, all the studied PPA are brittle. During both tensile and compression experiments, a strain hardening behavior is observed for all the studied samples and is more pronounced in compression. The testing temperature has an influence on the strain hardening modulus, contrary to the crystallinity. Strain hardening gives properties of stability and resistance to damage.
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