Polymethyl methacrylate PMMA

Total world consumption of PMMA was 988,000 tonnes in 2002. Cast sheet, extrusion sheet and moulding compounds each account for roughly a third of total production. 

In 2001, global PMMA demand was down by just over 5% due to a slowdown in major markets such as constmction and lighting and the automotive industry. Consumption fell sharpest in Japan, Europe and North America. 

Global demand recovered by an estimated 5-6% in 2002, with Europe experiencing the fastest growth. China and Pacific Rim countries were not far behind. North American and Japanese demand showed only a small recovery in 2002. 

For the period 2002-2007, world PMMA consumption is projected to increase at a compound annual growth rate of between 3-4%. The more mature North American and European markets will grow at around their historical trend rate of 2-3% per annum, while China and other developing Asian economies will show much higher growth in PMMA consumption. In contrast, the Japanese market will continue to stagnate. 

North America is the largest consumer of PMMA with 41.9% of total world consumption in 2002. Europe is second largest on 28.4%, followed by Asia with 19.6%. As with other polymer t5 es, the share of Asia Pacific countries, excluding Japan, will continue to grow during the next five years given the additional production capacity that is planned to come on stream in these countries. 

Acrylic components are rigid, dimensionally stable, odorless, resistant to many common chemicals and easy to deco- 

A stiff flowing material i.e. stiffer flowing than PS or ABS. Some lower molecular weight grades of PMMA are produced so as to achieve the same flowability in order to compete with PS for material selection. 

Easy flow grade (VS 100) High heat resistant grade 224 137 84 52 

Dilute acids and alkalis concentrated alkalis and concentrated hydrochloric acid aqueous solutions of salts and oxidizing agents, fats, oils and aliphatic hydrocarbons (for example, white spirit and paraffin), dilute alcohols and detergents. 

Concentrated, oxidizing acids (such as nitric and sulfuric) and alcoholic alkalis which cause decomposition. Soluble in most aromatic and chlorinated hydrocarbons (such as toluene and chloroform), esters (ethyl acetate) and ketones. Plasticized by ester-type materials such as tritolyl phosphate and dibutyl phthalate swollen by alcohols, phenols, ether and carbon tetrachloride. Ethyl acetate can be used to detect strain. 

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Polymethyl Methacrylate (PMMA), This material has exceptional optical clarity and resistance to outdoor exposure. It is resistant to alkalis, detergents, oils and dilute acids but is attacked by most solvents. Its peculiar property of total internal reflection is useful in advertising signs and some medical applications. 

Acrylic These polymethyl methacrylate (PMMA) plastics have high optical clarity,... 

This molecule is a copolymer with polymethyl methacrylate (PMMA) in acrylic latex paints, where the hydrophobic PMMA is surrounded by hydrophilic polyvinyl acetate molecules. Such a suspension of a hydrophobic polymer wrapped in a hydrophilic polymer is called a latex. 

Polymethyl methacrylate (PMMA) octylacrylamide/acrylates/butyl-aminoethyl methacrylate copolymer Plexiglas... 

Atlanta, Ga., 26th-30th April 1998, p.2942-5. 012 FEEDSTOCK RECYCLING OF POLYMETHYL METHACRYLATE (PMMA) BY DEPOLYMERISING IN A REACTIVE EXTRUSION PROCESS Breyer K Michaeli W IKV (SPE)... 

Determined by GPC with polymethyl methacrylate (PMMA) as the reference standard. "Molecular weight distributions. 

Liu and Rauch (2003) of Motorola investigated oligonucleotide probe attachment onto polystyrene (PS), polycarbonate (PC), polymethyl methacrylate (PMMA), and polypropylene (PP) plastic surfaces. They utilized three different immobilization processes SurModics surface modification solution (that allows attachment of adsorbed reactive groups to a surface by photoactivation of polymers at 254 nm). Pierce Reactive-Bind coating solution, and CTAB (cetyltrimethylammonium bromide, a cationic detergent). Not surprisingly, the microarray performances on these plastics varied. 

Most general purpose linear polymers, such as polyolefins, PS, PVC, and polymethyl methacrylate (PMMA), are not suitable for use at temperatures above 100 °C. PMMA and other polymers of 1,1-substituted vinyl monomers, such as poly-a-methylstyrene, decompose almost quantitatively to their monomers at elevated temperatures. However, the Tg and Tm values of these polymers are greater than those of polymers from 1-substituted vinyl monomers. For example, the Tg values of polymethyl acrylate (PMA) and PMMA are 276 and 381 K, respectively. 

The properties of polymers may be improved by the presence of appropriately selected additives. With the exception of some cast plastics, such as polymethyl methacrylate (PMMA), and some fibers, such as unpigmented cotton, most commercial polymers are mixtures of the polymer with one or more additives. 

They are atactic amorphous polymers which have good light transparency (92%) and yield transparent moldings and films. As was noted for polyalkyl acrylates, the solubility parameters decrease as the size of the alkyl groups increases. The flexibility also increases as one goes from polymethyl methacrylate (PMMA) to polyaryl methacrylate and then decreases as the size of the alkyl group is further increased. 

Polyhydroxyethyl methacrylate (phema) is more soluble in water than polymethyl methacrylate (PMMA). Cross-linked phema, which swells but does not dissolve in water, is used in soft contact lenses. 

Polymethyl methacrylate (PMMA) degrades under irradiation and becomes more soluble due to main chain scission. The degradation can be greatly reduced by the addition of 10% of various additives, such as aniline, thiourea, or benzoquinone. PMMA is an example of a nongelling polymer it does not form a three-dimensional network structure under irradiation. ... 

In the medical field, UV curable adhesives are used in fhe assembly of medical devices, such as syringes, valves, manifolds for filtering equipmenf, and arteriographs. In these applications, many dissimilar substrates, such as stainless steel, aluminum, glass, polycarbonate, polymethyl methacrylate (PMMA), PVC, and other thermoplastics, are bonded. ... 

Polymethyl methacrylate (PMMA) An atactic PMMA with a Ts of HOC and an intrinsic viscosity of 1.4 was obtained from Scientific Polymer Products, Inc. 

In the polymer impregnated gels, some porosity typically remains. Although some copolymers of methyl methacrylate, butadiene and styrene have been used to impregnate silica, the best known system is still silica impregnated with polymethyl methacrylate (PMMA)150-153. While this type of hybrid was important at first, it has been surpassed by other methods of hybrid synthesis that are simpler, with fewer steps and shorter times. 

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