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Polymères à hautes performances mécaniques élaborés par Compaction Grande Vitesse: mécanismes de frittage et relations procédé/microstructure/propriétés mécaniques.

Abstract : High Velocity Compaction is a new processing method for semi-crystalline polymers that consists in impacting with a controled cinetic energy a heated and powder-filled die. Highly-crystalline PolyOxyMethylene (POM) and Ultra High Molecular Weight PolyEthylene (UHMWPE) nascent powders have been used. After several repeated impacts, self-heating provokes a local melting at the interfaces and a the welding of the particles (sintering) is possible during recrystallization. The partial preservation of the high crystallinity of the nascent polymers allows an increase of the mechanical properties, in particular of the Young's modulus, yield stress, wear resistance and creep resistance. Ultimate properties depend on the sintering quality and the intrinsic properties of the initial particles. In addition, thanks to HVC, issues related to complete melting of the polymer are avoided, and elaboration without viscosity limitation is possible within competitive processing time. A new alternative for polymer processing ?
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Contributor : David Jauffres <>
Submitted on : Thursday, July 1, 2010 - 1:57:01 PM
Last modification on : Friday, October 23, 2020 - 4:38:40 PM
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  • HAL Id : tel-00496821, version 1

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David Jauffres. Polymères à hautes performances mécaniques élaborés par Compaction Grande Vitesse: mécanismes de frittage et relations procédé/microstructure/propriétés mécaniques.. Mécanique [physics.med-ph]. INSA de Lyon, 2007. Français. ⟨tel-00496821⟩

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