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 PnP a été retenue pour participer au Projet Européen : AEROMUCO avec EADS 

 Dr K.ZAHOUILY est été nommé depuis 2011 Expert Européen à REA ( Research Executive Agency ) à Bruxelles. 

 PnP Participe au Projet Orail II ( pour l'insuline Orale) PnP est membre depuis 2009 D' Oseo Excellence " parmi les 2000 entrepreneurs qui vont de l'avant" 

 Dr K.ZAHOUILY a été a été promu par le Ministre de la défense EN 2010 " chevalier de l´Ordre national du Mérite" La médaille lui a été remise par le Professeur Jean-Marie LEHN Prix Nobel de Chimie.

>> Reportages
Emission Un projet, Une équipe diffusé sur la chaine M6.
UV Curing , Matériaux Photopolymères
société de chimie innovante...
The potential applications in the field of photopolymerisable composite materials PDF Print E-mail

Improving performance and productivity of new materials

Composite materials based on acrylic or epoxy resins and glass fibers have been synthesized at room temperature by photopolymerization of multifunctional monomers. The advantage of photochemical initiation is the speed of the reaction that takes place in less than a second at room temperature. The fibers were treated by a specific lubricating lipophilic and make them achieve better wetting by the resin. The composites produced have reached a thickness of 3 to 5 mm. The polymerization of acrylic resin when exposed to ultraviolet light was followed in situ using infrared spectroscopy resolved in time.

The polymerization profiles recorded show a nearly complete reaction of the acrylate double bonds after 2 s of irradiation. The composite material thus obtained is fully reticulated and has excellent mechanical properties. The intimate association of the fiber treated or load and organic binder to the molecular level gives this material and viscoelastic mechanical properties superior to that of the matrix polymer photoréticulé. In addition, various types of three-dimensional polymer networks were synthesized by simple exposure to light, multifunctional monomers polymerise by radical (acrylate, thiol / polyene) or cationic (epoxides, vinyl ethers), or mixture of monomers by polymerising different mechanisms to form interpenetrated polymer networks (IPN).

The main interest of these IPNs is the possibility to combine in one material the properties of both networks, for example by combining the elastomer poly (vinyl ether) and the rigidity of polyacrylate, highly sought after properties in materials composites. We were able to show in this study that the characteristics of viscoelastic composites photoréticulés depend mainly on the chemical structure of the functionalized oligomers and cross-linking. Furthermore, we show that the nature of the emission spectrum of the lamp and the dose of irradiation are crucial on the final properties and the smooth running of the synthesis of composite material. The best performance was obtained by hybrid systems, combining radical and cationic monomers. This process has proved particularly suitable for manufacture in a few minutes Sleeves (cylinders) for flexographic printing with excellent mechanical properties and very resistant to shocks. During this project, we could reduce the increased productivity of our client. By reducing the time required for the fabrication of a composite cylinder (made of fiberglass) is increased from eight hours to 15 minutes. 8 h Scheme 8 h 10 min