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Bailleul Jean-Luc

Bailleul Jean-Luc

Laboratoire de Thermocinétique de Nantes, France

Title: Thermal characterization of a thermoplastic resin for resin transfer molding in process conditions. Demonstrating of the feasibility of the technology


Biography: Bailleul Jean-Luc


Composites materials pieces based on thermoplastics resins are suitable candidates to replace iron parts in the automotive sector for the purpose of reducing weight and hence to reduce CO2 emissions. But, the use of such composite material used in the automotive sector is notably determined by the total cost of the pieces. So, new materials such as low viscosity thermoplastics or reactive thermoplastics resins are developed to give an answer [1, 2]. These materials needs also the development of adapted processing methods like resin transfer molding (RTM) and compacting resin transfer molding (C-RTM).

In these presentation we deal with the thermal characterization of low viscosity resin, and more specially its crystallization kinetics [3], in wide temperature range with an Avrami model [4, 5]. The study of its density evolution during crystallization, according to the pressure and the temperature, is also presented [6]. Then we present new devices developed to prove the feasibility of thermoplastics resins processing by RTM [7, 8]. The experimental thermal measurements during an injection demonstrate the accuracy of our thermal model and of its thermal parameters.

Recent Publications :
1. ANR MATETPRO, project RTMPLAST (Thermoplastics resin transfer molding), 2010-2014
2. ANR MATETPRO, project TAPAS (Thermoplastic Process for Automotive Composite Structures), 2011-2015
3. Faraj J., Boyard N., Pignon B., Bailleul J-L., Delaunay D., Orange G. “Crystallization kinetics of new low viscosity polyamides 66 for thermoplastic composites processing,” Thermochimica-Acta, Volume 624, 27-34, 2016.
4. Avrami M., "Kinetics of phase change I, General Theory", J. Chem. Phys, vol. 7, 1103-1112, 1939.
5. Avrami M., "Kinetics of phase change II, Transformation-Time Relations for Random Distribution of Nuclei", J. Chem. Phys, vol. 8, 212-224, 1940
6. Pignon B., Tardiff X., Lefèvre N., Sobotka V., Boyard N., Delaunay D., "A new PVT device for high performance thermoplastics : Heat transfer analysis and crystallization kinetics identification.", Polymer testing 45, may 2015.
7. Faraj J, "Analyse thermocinétique de la cristallization en milieu confiné d'un composite à base d'une résine thermoplastique (Polyamide 66)", PhD thesis, University of Nantes, June 2016.
8. Cazaux G., "Faisabilité des procédés LCM pour l'élaboration de composites renfort continu à matrice thermoplastique polyamide", PhD thesis, University of Le Havre, June 2016.