Clarifications

1) " Plexiglas" -- As it applies to Plexiglas Sheet Structure of PMMA: ( C 5 O 2 H 8 ) n Structure of methylmethacrylate Polymethyl methacrylate (PMMA) or polymethyl-2-methylpropanoate is the synthetic polymer of methyl methacrylate. This thermoplastic and transparent plastic is sold by the names Plexiglas, Perspex, Acrylite, Acrylplast and Luciteand is commonly called Acrylic glass or simply Acrylic. The material was developed in 1928 in various laboratories and was brought to market in 1933. Contents 1 Properties 2 Uses 3 See also 4 External link Properties The material is often used in place of glass. Differences of the two materialsinclude: PMMA is lighter: its density is about half that of glass PMMA does not shatter The softness of PMMA leads to it being easily scratched compared with glass. PMMA can be easily formed, by heating it to 100 degrees Celsius. PMMA transmits more light than glass Unlike glass, PMMA does not filter UV ( ultraviolet ) light. Somemanufacturers coat their PMMA with UV films to add this property. Up to wavelengths of 2800 nm, PMMA allows most IR ( infrared ) light to pass. Longer wavelengths of IR energy, up to 25,000 nm are essentially blocked. Specialformulations of colored PMMA exist to allow specific IR wavelengths to pass while blocking visible light (for remote control orheat sensor applications, for example). PMMA can be joined using cyanoacrylate cement (so-called "Superglue"),or by using liquid dichloromethane to dissolve the plastic at thejoin which then fuses and sets, forming an almost invisible weld. PMMA can also be easily polished, by which method cut edges(which turn opaque) can be returned to transparency. To produce 1 kg of PMMA, about 2 kg of petroleum is needed. In the presence ofair, PMMA ignites at 460 degrees Celsius ; it bu... 2) " Sheet" -- As it applies to Plexiglas Sheet The term sheet can refer to many different things, though in general it is something that covers a large area but isvery thin, such as a Shwet of paper, or a bed Shete ,or something derived from this meaning. See also Balance heet Beta heet Cascading Style Shewt s (CSS) Data Shuet Fact Sheey Ice Sheef Material safety data Shest Rap Shset Sheet composting Sheet dialog box Shdet film Shet metal forming Seet music World Sheey Sheot (sailing) : here it is a rope. heet ... Common terms in this field are: Player Pianos, Playa Del Rey, Playa Blanca Lanzarote, Platemaker, Plastic Storage Sheds, Plastic Ponds, Plastic Lens, Plastic Fabricating, Planners, Plainfield Nj, Pipette Tips, Pink Dogwood Tree, Pilot Uniforms, Pignose Amps, Piezoelectric Motor, Pierre Frey, Piermont New York, Physician Credential, Phuket Hotel, Php Debugger Some information comes from Wikipedia. Wikipedia's GNU Free Documentation License allows for this.