Polymethyl methacrylate acrylic polymer

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. 

Uses. Production of polymethyl methacrylate polymers for use in acrylic sheet and acrylic molding, extrusion powder, acrylic surface coatings, printing inks, and adhesives used in surgery and dentistry... 

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. 

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. 

This tertiary amine group terminated polymer can undergo transfer in the presence of a second monomer (25, 26), e.g. with acrylonitrile or methyl acrylate which show an exceptionally high transfer constant with such groups (see Table 2). By this method acrylonitrile blocks are bounded to polymethyl methacrylate sequences the overall composition of these block copolymers may be represented by... 

Chain polymerization (addition reactions) polyoxymethylene, polymethyl methacrylate (PMMA), acrylic polymers, polystyrene and styrene copolymers, water-soluble polyamide... 

The newer type of colloidal catalysts have been prepared containing palladium (4), platinum (4), rhodium (5), and iridium (6). A variety of synthetic polymers has been applied. Among those tested were polyvinyl alcohol (PVA), polyvinyl acetate (PVAc), polymethyl methacrylate (PMMA), and polymethyl acrylate (PAMA). In general, polyvinyl alcohol (4a) has been found most satisfactory. 

The most widely used terms are acrylic add itse acrylamide, and, above all, acrylates and methacrylates. They are essentially used to manufacture polymers for many applications. inducting plastic films, molding powders, paint emulsions, etc. The most widely used polymer is polymethyl methacrylate (Plexiglas). 

The most common acrylic polymer is polymethyl methacrylate, which is obtained by polymerization of methyl methacrylate (MMA). The material consists of a highway-grade aggregate and a matrix produced by cross-linking MMA with trimethylol propane trimethacrylate or other polyfunctional acrylic oligomers. 

Contact lenses are the most common polymer product in ophthalmology. The basic requirements for this type of materials are (T)excellent optical properties with a refractive index similar to cornea good wettability and oxygen permeability ( ) biologically inert, degradation resistant and not chemically reactive to the transfer area ( ) with certain mechanical strength for intensive processing and stain and precipitation prevention. The common used contact lens material includes poly-P-hydroxy ethyl methacrylate, poly-P-hydroxy ethyl methacrylate-N-vinyl pyrrolidone, poly-P-hydroxy ethyl methacrylate, Poly-P-hydroxy ethyl methacrylate - methyl amyl acrylate and polymethyl methacrylate ester-N-vinyl pyrrolidone, etc. The artificial cornea can be prepared by silicon rubber, poly methyl... 

The acrylic polymer which offers the best all-round properties for a metal-coating lacquer exposed to the weather, is the hardest acrylic polymer, polymethyl methacrylate (molecular weight 80 000-150 000). It is hard, clear, scarcely coloured, very little affected by ultra-violet light, insoluble in commercial petrols and resistant to acids and alkalis. Marked deviations from the homopolymer reduce one or... 

Acrylics These are a versatile family of polymers, most commonly represented by polymethyl methacrylate (PMMA), or commercial names. Perspex or Plexiglass. It was developed in 1931. Its specific mass = 1.18. The chemical structure is as follows ... 

Melamine phosphate Tetrabromo-p-xylene Tetrakis (2-chloroethyl) ethylene diphosphate Triethyl phosphate flame retardant, polyimides Ethylenebis (tetrabromophthalimide) flame retardant, polymeric nylon Poly (pentabromobenzyl) acrylate flame retardant, polymeric PBT Poly (pentabromobenzyl) acrylate flame retardant, polymeric PET Poly (pentabromobenzyl) acrylate flame retardant, polymeric PP Poly (pentabromobenzyl) acrylate flame retardant, polymeric PS Poly (pentabromobenzyl) acrylate flame retardant, polymers Ammonium octamolybdate Dimelamine phosphate Ethylene diamine phosphate Melamine borate Melamine pyrophosphate Polydibromophenylene oxide Tris (2-chloropropyl) phosphate flame retardant, polymethyl methacrylate Dimelamine phosphate Diphenyl octyl phosphate... 

Acrylic o- kri-lik [ISV acrokein + -yl + -ic] (1855) adj. (1) The generic class of polymers and monomers (appox. 1942) derived from acrylic acid including polymethyl methacrylate. (2) Generic name for fibers... 

Acrylic coating polymers n. Acrylic resins or polymers such as polymethyl methacrylate used for formulating coating. 

Vinyl resins (1934) n. According to common chemical nomenclature, all resins and polymers made from monomers containing the vinyl group, H2C=CHX. In the chemical literature, polystyrene, polyolefins, polymethyl methacrylate and many other styrenic, ethenic, and acrylic co-polymers are classified as vinyls. In the plastics literature, the above materials are given their own classifications and the term vinyl is restricted to compounds in which X, above, is not H, a hydrocarbon radical, nor an acrylic-type ester. In daily use, the term vinyl plastics refers primarily to polyvinyl chloride and its co-polymers, and secondarily to the following polyvinyl acetal, polyvinyl acetate, poly-vinyl alcohol, polyvinyl but-yral, poly(n-vinylcar-bazole), polyvinyl dichloride, polyvinyl formal, polyvinylidene chloride, polyisobutylvinyl ether, and poly (1-vinylpyrrolidone). Mishra MKM, Yagd Y (1998) Handbook of vinyl polymerization. Marcel Dekker, New York. 

The acrylics can be formulated as thermoplastic resins, thermosetting resins, and as a water emulsion latex. The resins are formed from polymers of acrylate esters, primarily polymethyl methacrylate and polyethyl acrylate. Since the acrylate resins do not contain tertiary hydrogens attached directly to the polymer backbone chain, they are esceptionally stable to oxygen and UV light. The repeating units for the methacrylate and acrylate are as follows ... 

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