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Dynamic relaxations in a bio-based polyamide with enhanced mechanical modulus

Haddou, Geoffrey and Roggero, Aurélien and Dandurand, Jany and Dantras, Eric and Ponteins, Philippe and Lacabanne, Colette Dynamic relaxations in a bio-based polyamide with enhanced mechanical modulus. (2018) Journal of Applied Polymer Science, 135 (47). 1-6. ISSN 0021-8995

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Official URL: https://doi.org/10.1002/APP.46846


A new grade of bio-based polyamide (PA)—PA meta-xylylene diamine 10 (PA mXD 10)—was investigated. Its first interest is that it permits mild processing conditions at about 200°C. The calorimetric study shows the existence of two cold crystallizations indicative of slow crystallization rate. The glass transition stabilizes at 55°C. By combining calorimetry with dynamic mechanical analysis and dynamic dielectric spectroscopy, we found a perfect consistency between the set of data giving the molecular mobility. The localized relaxations follow Arrhenius equations while the viscoelastic transition follows a Vogel–Fulcher–Tammann law. The compilation of all the relaxation times determined by means of the different analyses highlights a good correlation. This result is perfectly explained by the polarity of the macromolecular chain. The dynamic mechanical behavior showed a storage modulus higher than for the corresponding aliphatic PA and nearly constant until room temperature.

Item Type:Article
HAL Id:hal-01962043
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Assystem (FRANCE)
Laboratory name:
Deposited On:20 Dec 2018 11:44

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