 |
 |
Journal articles
Morphology and dynamical mechanical properties of poly ether ketone ketone (PEKK) with meta phenyl links
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.
Cited literature [15 references]
https://hal.archives-ouvertes.fr/hal-01345998
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, July 18, 2016 - 10:23:51 AM
Last modification on : Friday, January 10, 2020 - 9:08:23 PM
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Monday, July 18, 2016 - 10:23:51 AM
Last modification on : Friday, January 10, 2020 - 9:08:23 PM
File
quiroga_cortes_15717.pdf
Files produced by the author(s)