David Marechal Email & Phone Number

Avignon, Provence-Alpes-Côte D’Azur, France

Isle-Sur-La-Sorgue

Sorgues (84)

• Head of emulsion brand of the group : R&D on emulsion at lab scale, scale-up to production, methods• In charge of resins sysnthesis for waterborne and solventborne technologies, methods• Follow research on 3D photopolymerization of thick epoxy materials further my Mäder Research experience and my PhD (supervisor of 2 PhD students)

Région De Mulhouse, France

Main Position: Scientific management of photopolymerization projects:• Polyester/acrylic and/or epoxydes chemistry for technical paints and coatings (with flame retardancy, anti-corrosion, -abrasion, -adhesives, UV resistant, chemical resistant, … properties) for automotive, railway, energy and aeronautic projects• Polyester/acrylic composites for interior and/or outdoor structural parts for automotive, railway, energy and aeronautic projectso Follow research on the radicalar 3D polymerization under UV/LED• Epoxydes thick or filled coatings and composites from UV/LED technologyo Follow research on the new initiator/photoinitiator system (patent N° 1H926020 0011 FR BN) for dual- or bi-cure cationic polymerization of epoxydeso Follow research on the cationic 3D propagation of epoxydes under UV/LEDOther Position: • Supervisor of problem solving and de-formulating analysis for all Mäder Group (IR, UV/Visible, DSC, DMA, FluoX, Light scattering, GC-MS, RMN,…)Results:Patent: X. Allonas, A. Ibrahim, F. laurent, A. Criqui et D. Maréchal. BNT219388FR00 (2015)

Région De Mulhouse, France

Subject/Objective: Ambient dual-cure or bi-cure cationic polymerization of epoxy resins for paints, coatings and composites materials applications. • Transfer a radicalar initiator/photoinitiator system to cationic chemsitry• Find a new and innovative initiator/photoinitiator system for ambient (without post-curing) cationic polymerization working• Combine it with co-initiator and other compounds for adjustable polymerization kinetics (initiation and propagation steps)• Demonstrate the potential of this technology in thermal and under UV/visible polymerization: Price ; availability or available synthesis of products ; polymerization kinetics ; mechanical, thermal and chemical properties ; shaping process• Understand reaction of initiator/photoinitiator with co-initiator and other compounds under thermal and irradiation stress• Understand how initiator/photoinitiator structure could modify kinetics• Understand polymerization and cross-linking reactions• Work on 3D photopropagation under dark condition• Develop a photoaccelerated or photoinitiated technology from the couple initiator-photoinitiator/co-initiator for infusion application or deep plastic partsResults: - D. Maréchal et al. US15121497; EP20150713543; FR1451647A; PCT/FR2015/050490. 2015-2016- S. Hanène, X. Allonas, C. Ley, D. Maréchal et A. Ak. Journal of Photopolymer Science and Technology. 25(2), 147-151 (2012)- D. Maréchal et al. Macromolecular Chemistry and Physics. 1-5 (2016)- X. Allonas, M. Lecompère, D. Maréchal et al. Polymer Chemistry. (2016)- M. Lecompère, X. Allonas, D. Maréchal et al. Polymer chemistry. 8, 388-395 (2017)- M. Lecompère, X. Allonas, D. Maréchal et al. Macromolecular Rapid Communication. 38 (2017)- M. Lecompère, X. Allonas, D. Maréchal et al. Journal of Photopolymer Science and Technology. 30, 399-404 (2017)- D. Maréchal, X. Allonas, A. Criqui. Redox intiated photo- and thermal cationic polymerization of epoxides. Polyray, 11-12 Avril 2013 (Rouen)

Région De Mulhouse, France

Subject/Objective: Studies of Hydroxypropylmethylcellulose (HPMC)/polyethylene glycol (PEG) films and solutions properties.• Drew up a infrared spectral fitting method• Identified hydrogen bonding between HPMCs and PEG by infrared spectroscopy• Understood molar mass, substitution degree and PEG content on drying process of HPMC by infrared spectroscopy• Kinetic of hydrogen bonding followed by infrared spectroscopy• Compared two HPMC grade (kinetic of hydrogen bonding)• Studied HPMC thermo-reversible gelation by infrared spectroscopy, dynamic light scattering and rheology• Studied molecules orientation of HPMC, PEG, stearic acid and blends (HPMC/PEG and HPMC/stearic acid) on functionalized (-CH3, -COOH, -NH2) and non-functionalized gold substrates by PM-IRRASResults: International paper in deposit

Orbey

Subject/Objective: Innovating material identification and characterization in relation to an innovation product mixing the admission of air and the cooling engine.• Drew up a mathematics model to work out the fin abilities function according to its design and material thermal conductivity value• Compared fin abilities made of plastics with aluminium• Chose best plastics matter for the application• Identified ideal plastics thermal conductivity • Planned plastics matter fillers for ideal thermal conductivity• Thermal and mechanical anisotropy characterization with fillers• Convinced the engineers team about plastics heat exchanger competitivenessResults: Started heat exchanger prototype design

Kaysersberg

Subject/Objective: Put in place new range of products (Akyboard) by the intermediary of mechanical and physic-chemical laboratory analysis of starting production.• Engineered a laboratory thermal pealing test to measure adhesion strength of Akyboard’s over layer• Executed mechanical analysis like flexion, traction and behaviour survey• Carried out physical chemistry analysis like IR and UV spectroscopy, rheology and composition survey• Completed competition analysis (example: honeycomb structure) Results: First trials on the new range of Akyboard

Pont-De-Roide

Subject/Objective: Thermal and rheological studies of polymers, components of the defective parts at the time of mechanical tests.• Did thermal characterizations of the matters (Differential Scanning Calorimetry)• Removed matter samples in different points of the production (raw material packaging, drying, material hopper, parts)• Went through thermal and rheological (Melt Flow Index) analysis of the sample and put together these two technical results• Justified and/or improved the parameters of the industrial cycle of the matterResults: Modified thermal process conditions of one of the production line

Belchamp

PSA Peugëot-Citroën is an automotive company located in Sochaux-Belchamp.Subject/Objective: Physical measurements on automotive mechanical or electrical parts.• Put in place gauges and sensors• Make road-test• Treat received signalsResults: Analysed systems: Brakes of C4 Picasso and C5, engine vibration on the future DS3 engine, data sampling of C4 VPN socket, fixing seat of 207.

Research Doctorate, Physical Chemistry, Distinction

See "Expérience"

Master’S Degree, Polymer Sciences, Distinction (Top Of The Year)

Physical Chemistry of polymer

Bachelor Of Science (B.S.), Polymer And Composite Technology, Distinction

Physical chemistry of polymers and composites Polymers and composites manufacturing

A Two-Year College Degree, Physical Measurements

Physical Measurements in mechanic, materials, chemistry and so on.

Education record

Education record

Education record