TTT diagram of the anionic polymerization PA6 from ε-Caprolactam [epsilon-caprolactam]

Abstract : Adaptation of liquid reactive process for composite thermoplastic manufacturing has been studied through the polyamide 6 case. Its polymerization from ε-caprolactam monomer involves simultaneously the crystallization of the growing chains over the temperature range. In order to understand and predict the behavior of the coupling between both phenomena, an experimental study has been carried out by performing isothermal syntheses in DSC. Different curves morphology has been obtained, depending of the level of coupling between polymerization and crystallization. The final degree of conversion, characterized by TGA, has been recorded between 92 and 97 wt.%, indicating a high reaction yield. The crystalline phase obtained has been characterized by DSC and WAXS. The samples showed a high crystallinity and from α-type. This database has been used as input into phenomena modeling. Polymerization was described by Malkin’s model and crystallization by JMA’s model. The Hillier’s coupling has been adapted in the polymerization/crystallization case by adding a diffusion factor, allowing a better understanding of mechanisms. Thank to this work, isothermal TTT diagrams of the PA6 synthesis have been established.
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Conference papers
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https://hal-mines-albi.archives-ouvertes.fr/hal-01699337
Contributor : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Submitted on : Friday, February 2, 2018 - 11:27:30 AM
Last modification on : Monday, April 29, 2019 - 4:29:11 PM

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  • HAL Id : hal-01699337, version 1

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Céline Vicard, Olivier de Almeida, Arthur Cantarel, Gérard Bernhart. TTT diagram of the anionic polymerization PA6 from ε-Caprolactam [epsilon-caprolactam]. ICCM 21 - 21th International Conference on Composite Materials, Aug 2017, Xi'an, China. 10 p. ⟨hal-01699337⟩

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