Monomer methyl methacrylate

Place 25 g. of methyl methacrylate polymer (G.B. Diakon (powder). Perspex (sheet) U.S.A. Lucite, Plexiglass) in a 100 ml. Claisen flask, attach an efficient condenser e.g., of the double smface type) and distil with a small luminous flame move the flame to and fro around the sides of the flask. At about 300° the polymer softens and undergoes rapid depolymerisation to the monomer, methyl methacrylate, which distils over into the receiver. Continue the distillation until only a small black residue (3-4 g.) remains. Redistil the hquid it passes over at 100-110°, mainly at 100-102°. The yield of methyl methacrylate (monomer) is 20 g. If the monomer is to be kept for any period, add 0 -1 g. of hydro quinone to act as a stabiUser or inhibitor of polymerisation. 

The chemical resistance and excellent light stabiUty of poly(methyl methacrylate) compared to two other transparent plastics is illustrated in Table 5 (25). Methacrylates readily depolymerize with high conversion, ie, 95%, at >300° C (1,26). Methyl methacrylate monomer can be obtained in high yield from mixed polymer materials, ie, scrap. 

Butyl alcohol is employed as a feedstock in Japan to make methyl methacrylate monomer. In one such process (26), the alcohol is oxidized (in two steps) to acryHc acid, which is then esterified with methanol. In a similar process (27), /-butyl alcohol is oxidized in the presence of ammonia to give methacrylonitrile [126-98-7]. The latter is hydrolyzed to methacrjiamide [79-39-0] which then reacts with methanol to yield methyl methacrylate [80-62-6]. 

The performance of many metal-ion catalysts can be enhanced by doping with cesium compounds. This is a result both of the low ionization potential of cesium and its abiUty to stabilize high oxidation states of transition-metal oxo anions (50). Catalyst doping is one of the principal commercial uses of cesium. Cesium is a more powerflil oxidant than potassium, which it can replace. The amount of replacement is often a matter of economic benefit. Cesium-doped catalysts are used for the production of styrene monomer from ethyl benzene at metal oxide contacts or from toluene and methanol as Cs-exchanged zeofltes ethylene oxide ammonoxidation, acrolein (methacrolein) acryflc acid (methacrylic acid) methyl methacrylate monomer methanol phthahc anhydride anthraquinone various olefins chlorinations in low pressure ammonia synthesis and in the conversion of SO2 to SO in sulfuric acid production. 

Over the years many blends of polyurethanes with other polymers have been prepared. One recent example is the blending of polyurethane intermediates with methyl methacrylate monomer and some unsaturated polyester resin. With a suitable balance of catalysts and initiators, addition and rearrangement reactions occur simultaneously but independently to give interpenetrating polymer networks. The use of the acrylic monomer lowers cost and viscosity whilst blends with 20% (MMA + polyester) have a superior impact strength. 

See Methyl methacrylate monomer also Mono-methyl amine (Methylamines)... 

The following reaction scheme is suggested for methyl methacrylate monomer and CHBra halide as coinitiators ... 

Methacrylic acid is esterified with methanol to produce methyl methacrylate monomer. 

Figure 9 shows the result of injecting 10 gA of the total low molecular weight fraction from GPC 1 (Column Code A2) into GPC 2 (Column Code Bl). With this column code, GPC 2 is performing as a High Performance Liquid Chromatograph (HPLC). Separation is based upon solubility (i.e. composition differences) rather than upon molecular size. Methyl methacrylate monomer was used as a reference and added to the solution injected into GPC 1. Concentrations of n-butyl methacrylate, styrene and conversion are readily calculated from the peak areas and initial concentrations. 

PMMA Methyl methacrylate monomer, black specks... 

Synonyms AI3-24946 BRN 0605459 CCRIS 1364 Diakon EINECS 201-297-1 Eudragit Methacrylic acid, methyl ester Methyl-a-methylacrylate Methyl methacrylate monomer Methyl-2-methyl-2-propenoate MMA Mme Monocite methacrylate monomer NA 1247 NCI-C50680 NSC 4769 Paladon Pegalan 2-Propenoic acid, 2-methyl methyl ester RCRA waste number U162 TEB 3K UN 1247. 

Methyl methacrylate monomer, see Methyl methacrylate IV-Methylmethanamine, see Dimethylamine Methyl methanoate, see Methyl formate Methyl-a-methylacrylate, see Methyl methacrylate Methyl-2-methyl-2-propenoate, see Methyl methacrylate Methyl 2-methyl-l-propenyl ketone, see Mesityl oxide p-Methylnaphthalene, see 2-Methylnaphthalene IV-Methyl-l-naphthylcarbamate, see Carbaryl IV-Methyl-a-naphthylcarbamate, see Carbaryl IV-Methyl-a-naphthylurethan, see Carbaryl... 

PAN.PMMA and Copolymer of AN/lC Conditions were optimised for homo-polysjerisation of acrylonitrile and methyl methacrylate monomers and copolymerisation of AK/MMA. The characteristics of these polymers are given in Table II. 

Laboratory reagent grade methyl methacrylate monomer was dried over powdered calcium hydride and freshly distilled before use. The checkers found that identical yields could be obtained when Matheson Coleman and Bell Chromatoquality methyl methacrylate monomer was used as received with no purification. 

Polymerization of methyl methacrylate monomer with cobalt-60 as source of y-rays, Free radical formation is involved in both cross-linking and polymerization reactions This technique is also being applied in the textile finishing field for grafting and cross-linking fibers with chemical agents for durable-press fabrics. 

Using the same method Akutin (7) was able to produce block and graft copolymers from several systems containing methyl methacrylate monomer and polydimethyl siloxane, polytrifluoroethylene or a copolymer tetrafluoroethylene-vinylidene fluoride. 

Vacuum pump to 1 inch Hg. c Methyl methacrylate monomer. 

A1(TPP)CH3 Methyl methacrylate (monomer) Polymethyl methacrylate Solvent benzene, CH2C12 Xlrr > 420 nm 100% conversion can be achieved in the presence of butyl methacrylate a copolymer is formed [115]... 

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