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.
• 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.
• 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..

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.
• Understand reaction of initiator/photoinitiator with co-initiator and other compounds under thermal and irradiation stress

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)

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

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