Le contexte sanitaire lié à la pandémie COVID-19 a entraîné le développement rapide de nombreux vaccins contre virus SarS-Cov-2. Quatre d’entre eux sont actuellement disponibles en France et contiennent comme excipients du polyethylène glycol (PEG) ou polysorbate 80, déjà décrits pourvoyeurs d’anaphylaxie. Des recommandations françaises ont été suggérées par plusieurs instances d’allergologie p...

Epoxides are frequently used in coatings due to their great adhesion most materials, high resistance towards chemicals and well-defined material properties. Onium salts such as iodonium sulfonium one of the widespread classes initiators light-induced cationic polymerization epoxides. We successfully synthesized onium based on group 14 16 elements periodic table. They were then characterized usi...

In this paper we build some composite materials reinforced with needles from fir trees. order to the samples, have firstly created strips in way: put pines, continuously, on a sheet of where apply thin layer resin (we used epoxy and polyester ones). We made 10 glued them together by using same synthetic resins (epoxy polyester). end obtained composites trees sheet, matrix is resins. From plate,...

Stereolithography is not only ideal to study the function and the design of a simple or complex component, but also for stress and strain analysis by means of photoelasticity. The basis for using Stereolithograpy components is the biremngent property of the photoPOIYffiers, which has been discovered in 1991 in the Lab ofPhotoelasticity and Holography [5]. Therefore, a few acrylate and epoxy res...

BACKGROUND Tetraglycidyl-4,4'-methylenedianiline (TGMDA) is an aniline epoxy resin used in, for example, resin systems of pre-impregnated composite materials (prepregs) of the aircraft industry. Allergic contact dermatitis caused by TGMDA in prepregs has been described previously. OBJECTIVES To report on 9 patients with occupational allergic contact dermatitis caused by TGMDA in epoxy glues u...

Fibre-reinforced polymer(FRP), also Fibre-reinforced plastic, is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass, carbon, or aramid, al‐ though other fibres such as paper or wood or asbestos have been sometimes used. The poly‐ mer is usually an epoxy, vinylester or polyester thermosetting plastic, and phenol formaldehyde resins are still in use...

A pulsed photoacoustic technique was used for generation of ultrasonic pulses along with optical detection inside a transparent polymer resin undergoing a curing reaction. The changes in acoustic parameters during the solidification process was measured and were found to agree with the accepted general model for the kinetics of the curing reaction for polyester and epoxy resins. The advantages ...