Le PMMA (Polymétacrylate) est un thermoplastique transparent et rigide. Polymethylmethacrylate (PMMA) was irradiated (360–811 h) in a UV-B accelerated aging chamber at room temperature and oxidizing atmosphere. Influence of ultraviolet radiation on polymethylmethacrylate (PMMA). Poly(methyl methacrylate) (PMMA), also known as acrylic, or acrylic glass, as well as by the trade names Crylux, Plexiglas, Acrylite, Astariglas, Lucite, Perclax, and Perspex, among several others , is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass. We have optimized our medical polymers for the best available UV transparency by eliminating UV stabilizers, and thus we do not recommend use in repeat sterilization or other long term UV exposure applications. Il est doté d’une belle surface lisse et brillante.
Le PMMA coulé (plexi) a la particularité d’être très résistant aux agents atmosphériques, à la corrosion et aux UV malgré sa légèreté. Disponible sur mesure, designs ou formes personnalisés, ou en plaques de 2040mm x 3040mm. PLEXIGLAS® LED assure une transmission maximale de la lumière, permettant ainsi des effets de changement de couleur fluides et fascinants tout en évitant les points chauds gênants. The aim of the present work to investigate the effect of UV-irradiation on the optical properties of PMMA within period of time (24,72,and120hr.). Where a 5% Most TOPAS COC customers injection mold their UV transparent parts. TOPAS COC medical grade polymers enable miniaturization of UV testing systems, eliminating the limitations of glass. Until not too long ago, there was o 18,90 € 18,90 € Recevez-le demain le 29 décembre. fep uv transmission data. I am interested in finding a polymer with similar optical transmission properties of UV PMMA grade cuvettes. The heat generated from the radiation source causes a sudden drop in the launched radiation due to thermal-oxidation and photo … Barrier Many medical plastics are poor barriers to moisture and chemicals, leading to a short shelf life. Cuadros Lifestyle Verre acrylique PMMA XT Transparent Résistant aux UV Feuille sur les deux faces Découpe 4 mm d'épaisseur, Dimensions 30 x 30 cm. PLEXIGLAS® Hi-Gloss. These samples were evaluated spectrophotometrically before and after UV-irradiation. Unlike glass, it has a non-ionic, inert surface to minimize reactivity, denaturation, agglomeration, delamination and other traditional glass concerns. Graph 2: UV Light Transmission of Colorless ACRYLITE GP, ACRYLITE FF, ACRYLITE OP-1, ACRYLITE OP-2, ACRYLITE OP-3 and ACRYLITE OP-4 sheet (Approximation only – not a specification). He needed to test the transmittance of infrared at 940nm. We use cookies to help provide and enhance our service and tailor content and ads. Applications that commonly see problems with traditional acrylic sheeting include display cases, museum lighting, animal habitats, tanning beds, and more. In addition, the refractive indices of PMMA and SiO 2 are an example of properties that they are optically related materials [17]. This poses problems in the use of EFKs (electronic fly killers) and sterilising plants which use ultraviolet emitting lamps. Site Map | Imprint | Privacy Policy/Data Privacy & GDPR One of the most common applications of UV transmitting plexiglass is indoor tanning beds. UV-Stability. Light weight is another advantage of COC, of course, as is the ability to create more sophisticated and complex designs than glass or other polymers. Polystyrene. Being highly stable under weathering conditions, easy to mould, with a high degree of transparency and light transmission (92%), these sheets are ideal for manufacturing signs, lettering and lighting. With amazing detail reproduction, high flow for complex geometries, and excellent dimensional stability, it's become the clear choice for the compact, lightweight precision disposables and devices of tomorrow.. Blend films of PMMA and PVAc with different concentrations have been prepared by casting method, and they were exposed to UV and filtered radiation for 24 hours. OP-4 acrylic sheet transmits a high percentage of UVA and UVB light. Disponible sur mesure, forme spéciale ou plaque de 2040mm x 3040mm. Healthcare environments can be challenging to ordinary plastics. There are special 'uv transmitting acrylite OP4 UV' sheets that are manufactured for use in indoor tanning equipment. Plaque, bloc, feuille, bâton, barre, tube, demi-sphère et sphère en PMMA coulé (plastique, plexi) transparent et couleur. Follow the industry leader and rely on our USP Class VI / ISO 10993 series of medical grade materials for your next medical device. Polymethylmethacrylate (PMMA) was irradiated (360–811 h) in a UV-B accelerated aging chamber at room temperature and oxidizing atmosphere. Gamme Night & Day. UV Transmitting Acrylic. Most grades of TOPAS COC also have broad compliance with global food packaging regulations. The macromolecular changes attributed to the radiation were investigated by means of tests such as: traction test, percent cross-linking, thermogravimetric analysis (TGA), Fourier transform spectroscopy (FTIR) and ultraviolet visible … Le PMMA (Polyméthacrylate de Méthyle) est une plaque coulée ou extrudée combinant qualité optique et résistance aux UV (PMMA extrudé et PMMA coulé). By continuing to use the TOPAS.com website, you acknowledge our updated Privacy Policy and agree to our updates. Acrylic/Styrene. I then put a drop of water on each one and re-ran for transmission. Please note that additional wavelength ranges and other plastics can be viewed below. Achetez B&T Metall Plaque de verre acrylique PMMA XT (Plexiglas®), blanc opalin, surface lisse de 3 mm d'épaisseur, verre dépoli, transmission lumineuse de 78%, résistant aux UV, filmé des deux côtés: Amazon.fr Livraison & retours gratuits possible (voir conditions) Terms of Use | Contact, © 2021, TOPAS Advanced Polymers/Polyplastics Barrier Many medical plastics are poor barriers to moisture and chemicals, leading to a short shelf life. light transmissions through PMMA films of different layer thicknesses on SiO 2 substrates for solar cell applications using Fourier transform infrared (FTIR) and ultraviolet visible and near infrared (UV-Vis-NIR) spectroscopy. TOPAS medical grade polymers have exceptional moisture barrier properties, and resist permeation by other substances as well, as noted above. In applications employing reagents, solvents, and advanced chemistry, accuracy and shelf life are extended with TOPAS COC UV transparent plastics. The wavelengths of visible light fall within the range of approximately 400 to 700 nanometers in the elec-tromagnetic spectrum. Fibers can be used to easily and flexibly transmit UV light for use in measurement, testing, or spectroscopy. Many medical plastics are poor barriers to moisture and chemicals, leading to a short shelf life. It offers high levels of UV light transmission and strong resistance to degradation caused by UV light. The family of TOPAS COC medical plastics includes grades with heat resistance up to 170C. Transmission characteristics are shown in the chart. UV light, a form of energy, is defined as light having wavelengths between 100 nanometers (nm, 1 billionth of a meter in length) and 400 nm. But without UV transparent materials, many forms of analysis would be impossible. High absorption also results in another e ect due to UV: damage. Le PMMA signifie Polyméthacrylate de méthyle plus souvent appelé Plexi, il existe sous deux types de qualité, le PMMA coulé (CN) et le PMMA Extrudé (XT). PMMA also finds used in solar panels as cover materials thanks to its excellent UV resistance and excellent light transmission allowing high energy conversion efficiencies. Meilleure qualité optique et resistance aux UV. Grâce au procédé qui consiste à couler le monomère (MMA) entre deux plaques de verre avant polymérisation, la matière est exempt de contraintes internes. China UV-Transmitting, UV-Stabilized, PMMA 400nm, UV Plastics, Find details about China UV-Transmitting Clear, UV-Stabilized Clear from UV-Transmitting, UV-Stabilized, PMMA 400nm, UV Plastics - SHANGHAI ETHER SUPPLY LTD. His sample was a 3mm thick acrylic PMMA material with a aperture size of 3-4mm. We chose first to analyse results reported by Kfiper and Stuke [3] who studied the UV spectral transmission of PMMA following exposure of films to varying numbers of 248 nm KrF-laser pulses at a fluence of 40 mJ/cm2. ... (where \tau is the transmission coefficient) Published by Elsevier B.V. Journal of Materials Research and Technology, https://doi.org/10.1016/j.jmrt.2019.06.023.
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