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Morphology and dynamical mechanical properties of poly ether ketone ketone (PEKK) with meta phenyl links

Quiroga Cortes, Luis and Caussé, Nicolas and Dantras, Eric and Lonjon, Antoine and Lacabanne, Colette Morphology and dynamical mechanical properties of poly ether ketone ketone (PEKK) with meta phenyl links. (2016) Journal of Applied Polymer Science, 133 (19). 1-10. ISSN 0021-8995

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Official URL: http://dx.doi.org/10.1002/app.43396

Abstract

Poly ether ketone ketone (PEKK) with different proportion of meta phenyl links were investigated by combining differential scanning calorimetry and dynamic mechanical analysis. The influence of the Terephthalyl/Isophthalyl isomers (T/I) ratio on the vitreous phase is mild, the shift of the glass transition is limited to a few degrees and the vitreous G0 is only sensitive to the content of the crystalline phase. Contrarily, the increase of meta isomers is responsible for a significant decrease of the melting temperature (Tm) by 60 8C, which considerably facilitates processing. The modification of interchain interactions in the crystalline phase might be implied. A series of thermal protocols evidenced that the difference of crystallization behavior is also dependent upon the T/I isomer ratio. A time and temperature dependence of annealing on the double melting behavior of PEKK was observed. Regarding the mechanical behavior, the observed reinforcing effect due to the crystalline phase was more prominent in the rubbery state than in the glassy state.

Item Type:Article
Additional Information:Thanks to Wiley editor. The definitive version is available at http://onlinelibrary.wiley.com The original PDF of the article can be found at Journal of Applied Polymer Science website : http://onlinelibrary.wiley.com/wol1/doi/10.1002/app.43396/full
HAL Id:hal-01345998
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:22 Jun 2016 09:43

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