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Poly(methyl methacrylate) print that page


formulated in 1865. The reaction between methacrylic acid and methanol results in the ester methyl methacrylate . The German chemists Fittig and Paul discovered in 1877 the polymerization process that turns methyl methacrylate into polymethyl methacrylate . In 1933 the German chemist Otto

Methyl methacrylate print that page

given for materials in their standard state (at 25 °C, 100 kPa) Infobox references Methyl methacrylate is an organic compound with the formula CH 2 =C(CH 3 )OOCH 3 . This colourless liquid, the methyl ester of methacrylic acid (MAA) is a monomer produced on a large scale for

wikipedia.org | 2011/3/19 10:24:39

Plasma polymerization print that page

dielectric constants [ 1 ] . Some common monomers polymerized by this method include styrene, ethylene, methacrylate and pyridine, just to name a few. The 1970s brought about many advances in plasma polymerization, including the polymerization of many different types of monomers, and a probable

wikipedia.org | 2011/9/10 15:04:18

Contact lens print that page


A contact lens (also known simply as contacts for a pair) is a corrective , cosmetic , or therapeutic lens usually placed on the cornea of the eye . Leonardo da Vinci is credited with describing and sketching the first ideas for contact lenses in 1508, but it was more than 300 years later

Polycarbonate print that page


polycarbonate exterior automotive components. The characteristics of polycarbonate are quite like those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is stronger, usable in a wider temperature range but more expensive. This polymer is highly transparent to visible light

Scintillator print that page


A scintillator is material which exhibits scintillation – the property of luminescence [ 1 ] when excited by ionizing radiation . Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate, i.e. reemit the absorbed energy in the form of light. [ 2 ]

Polyphenyl ether print that page

The proper name for a phenyl ether polymer is poly(phenyl ether) or polyphenyl polyether, but the name polyphenyl ether is widely accepted. Polyphenyl ethers (PPEs) are obtained by repeated application of the Ullmann Ether Synthesis : reaction of an alkali-metal phenate with a halogenated benzene

wikipedia.org | 2010/9/24 21:01:10

Ocular prosthesis print that page


An ocular prosthesis or artificial eye (a type of Craniofacial prosthesis ) replaces an absent natural eye following an enucleation , evisceration , or orbital exenteration . The prosthetic fits over an orbital implant and under the eyelids . Often referred to as a glass eye , the ocular

Tanning bed print that page


A sunbed (British English), tanning bed (American English) or sun tanning bed is a device which emits ultraviolet radiation (typically 97% UVA and 3% UVB, +/-3%) to produce a cosmetic tan . Regular tanning beds use several fluorescent lamps that have phosphor blends designed to emit UV

Artificial nails print that page


used to create longer, better-looking nail enhancements. One popular material commonly called " Polymethyl methacrylate acrylics " is a mixture of a polymer powder and a liquid monomer (e.g. ethyl methacrylate ). The mixture starts to harden in 30–40 seconds after application and continues