polymethyl methacrylate

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polymethyl methacrylate

/poly·meth·yl meth·ac·ryl·ate/ (pol″e-meth´il meth-ak´ril-āt) a thermoplastic acrylic resin formed by polymerization of methyl methacrylate. Abbreviated PMMA. Written also polymethylmethacrylate.


, polymethyl methacrylate (pol′ē-meth′ĭl-meth″ak′rĭ-lāt″) [ poly- + methyl + methacryl(ic acid) + -ate],


C5H8O2, a transparent, colorless acrylic polymer. It is used in optics and ophthalmology to make intraocular lenses for cataract surgery, in dentistry as a denture base material, in cosmetic surgery as a soft-tissue filler, and in the fabrication of dialysis membranes with high biocompatibility.

polymethyl methacrylate (PMMA)

Polymerized methyl methacrylate forming a light transparent thermoplastic material used in the manufacture of some spectacle lenses and formerly hard contact lenses. See modulus of elasticity; plastic spectacle frame.
References in periodicals archive ?
SABIC CYCOLOY polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) resin and a polymethyl methacrylate (PMMA) are two-shot injection molded by Mitchell Plastics to form the floating island bezel lens, and custom-colored SABIC GELOY acrylic-styrene-acrylonitrile (ASA) resin is injection molded to create the accent edging.
BASF Corporarion has received a patcnr for a color effect material comprised of a platelet-shaped substrate sequentially encapsulated with a first layer which is highly reflective to light directed thereon and which is selected from the group consisting of silver, gold, platinum, palladium, rhodium, rurhenium, osmium, iridium and alloys thereof; and a second spacer layer which does not provide significant incident angle dependent variable pathlength difference, the spacer layer is selected from the group consisting of chromium oxide, zinc oxide, zinc hydroxide, zirconium oxide, zirconium hydroxide, zirconium nitride, titanium nitride, iron hydroxide, polymethyl methacrylate, polyethylene tcrephthalate, and high density polyethylene.
If you were a fashionable lady in the 1950s, you sported shoes with heels made of acrylic or, to be more specific, polymethyl methacrylate.
Then Yi and Li used a commercially available milling tool with a diamond blade to cut the shape from a piece of the common thermoplastic material polymethyl methacrylate, a transparent plastic that is sometimes called acrylic glass.
They are especially designed to colourise thermoplastic materials such as PET, polycarbonate (PC), polystyrene, polymethyl methacrylate or acrylonitrile-butadiene styrene.
toluene for polystyrene, acetone for polybutyl acrylate, polymethyl methacrylate, and polybutyl methacrylate).
Polymethyl methacrylate (PMMA) for example, can be grafted onto the backbone of natural rubber forming a copolymer having two separate Tg's (-73[degrees]C for natural rubber and 125[degrees]C for PMMA).
Recommended for PVC, unsaturated polyesters, styrenic resins, PC, polyacetal, polyamides, polymethyl methacrylate, polyurethane and coating related resins.
Initial experiments involved contact between the microscope's nickel tip and a thin sheet of a polymer known as polymethyl methacrylate.
Since polymethyl methacrylate is a linear thermoplastic polymer, it possess high mechanical strength and is also highly scratch resistant.
Tenders are invited for Supply , Design, Printing And Installation Of Thick Glassy Coated Hard Synthetic Fabric Adhesive Material Enclosed Between 2 X 5 Mm Thick Transparent Polymethyl Methacrylate Sheet And Fixing With Stainless Steel Coated Studs Of 50 Mm Length.