Methacrylate Homopolymer

This example is the simplest formulation for an emulsion polymerisation consisting of one of each of the four essential components i.e. water, surfactant, monomer and initiator. 

An aqueous phase is first prepared by dissolving 0.8 parts of sodium lauryl sulphate in 55 parts ofde-ionised water in the reaction vessel. 

An initiator solution consisting of 0.1 part ammonium persulphate dissolved in 4.5 parts ofde-ionised water is prepared in a separate vessel. 

40% of this initiator solution is added to the reaction vessel, together with 4 parts of methyl methacrylate. 

The temperature of the reaction vessel is raised to 75°C. An inert gas flow is sustained through the reaction mass throughout the reaction. 

---

Numerous recipes have been pubUshed, primarily ia the patent Hterature, that describe the preparation of acrylate and methacrylate homopolymer and copolymer dispersions (107,108). A typical process for the preparation of a 50% methyl methacrylate, 49% butyl acrylate, and 1% methacrylic acid terpolymer as an approximately 45% dispersion ia water begias with the foUowiag charges ... 

In methacrylic ester polymers, the glass-transition temperature, is influenced primarily by the nature of the alcohol group as can be seen in Table 1. Below the the polymers are hard, brittle, and glass-like above the they are relatively soft, flexible, and mbbery. At even higher temperatures, depending on molecular weight, they flow and are tacky. Table 1 also contains typical values for the density, solubiHty parameter, and refractive index for various methacrylic homopolymers. 

Grassie, N., "Recent Work on the Thermal Degradation of Acrylate and Methacrylate Homopolymers and Copolymers", Pure and Appl, Chem., 1972, 30, 119-134. 

Methacrylate homopolymers, physical properties of, 16 272t Methacrylate inhibitors, 16 258-259 Methacrylate monomers, 16 277-279. 

Previous work on allyl methacrylate homopolymers and statistical copolymers clearly showed that the allyl group is a very effective cross-linking function when exposed to x-rays (2) ... 

The initial product is essentially poly(methyl methacrylate) homopolymer. Little styrene is incorporated into copolymer chains unitl most or all of the methyl methacrylate is exhausted. Reports of significant amounts of styrene in products from anionic copolymerization of styrene-methyl methacrylate are usually artifacts of the particular reaction system, a consequence of heterogeneity of the propagating centers and/or counterion. 

There are a variety of arylalkyl methacrylate homopolymers which do not exhibit excimer fluorescence in dilute solution. Such polymers containing the phenyl 43,147), carbazolyl196,197), or phenanthryl197) chromophore have been examined. Fluorescence quenching has been studied only in a series of phenyl-containing methacrylate polymers 43), however. 

In both series of copolymers, the methoxyl resonance is surprisingly complex and appears to offer the best promise of yielding fundamental information concerning the microstructure of the chains. In methyl methacrylate homopolymers, the methoxyl protons appear as a single narrow peak at 6.40t regardless of the stereochemical configuration of the chains. In the copolymers, the methoxyl resonance is evidently very, sensitive to the configuration and proximity of the... 

Effects of additives in the matrix were observed by substituting for methyl methacrylate a poly (methyl methacrylate) homopolymer with a solution molecular weight of 950,000, a vinylidene fluoride copolymer (Pennwalt s Kynar 7201), and a methacrylate-butadiene-styrene impact modifier (Marbon s Blendex BTA IIIN). Concentrations were 2% on the total dispersion volume. The same additives were studied at the same volume concentration in the dispersed phase. Barium sulfate (Whittaker, Clark, and Daniels Barytes No. 91), a commonly used additive for radiopacity, was also studied in the dispersed phase. Responses were observed by the test methods described below. 

KORAD LPT LUCITE METAPLEX NO METHACRYLIC ACID METHYL ESTER POLYMERS METHYL METHACRYLATE HOMOPOLYMER METHYL METH.ACRYLATE POLYMER METHYL METHACRYLATE RESIN 2-METHYL-2-PROPENOIC ACID METHYL ESTER HOMOPOLYMER ORGANIC GLASS E 2 OSTEOBOND SURGICAL BONE CEMENT... 

UV absorption spectra, fluorescence emission spectra and photostabilization effect of 2-(2-hydroxy-4-acryloyloxyphenyl)-2/7-benzotriazole and of its polymer bound forms were studied in poly-CK-l,4-polybutadiene [337]. The following activity series was found copolymer with methyl methacrylate > homopolymer > monomer. It seems that chromophoric units incorporated into a macromolecule behave cooperatively (causing self-absorbance of the emitted radiation). 

Ethyl methacrylate and n-butyl methacrylate homopolymers and copolymers were separated at a column temperature of 60 °C by gradient... 

Butun, V. Armes, S. R BrUingham, N. C. Synthesis and aqueous solution properties of near-monodisperse tertiary amine methacrylate homopolymers and diblock copolymers. Polymer 2001, 42, 5993-6008. 

Figure 7. Surface pressure-area curve for mixture of dimethylsiloxane and methyl methacrylate homopolymers, 42.2% siloxane. Solid curve observed for mixed film. Dashed curve calculated for additivity of single component monolayers.

Methacrylic acid methyl ester polymers Methyl methacrylate homopolymer 2-Methyl-2-propenoic acid methyl ester... 

Chem. Descrip. Methacrylate homopolymer Uses Acrylic for lacquers for vinyl films, tiles, fabrics, metals, paper, and wood, barrier coats, inks, adhesives used with sol n. vinyls, NC Features Solid, thermoplastic acrylic hard and durable film Properties Beads sp.gr. 1.19 vise. 1200 cps (35% MEK) R B soften, pt. > 200 C Sward hardness 60 (7 days) 98% NV NeoCryl B-735 [NeoResins]... 

Synonyms Methacrylic acid methyl ester polymers Methyl methacrylate homopolymer Methyl methacrylate polymer Methyl methacrylate polymers Methyl methacrylate resin 2-Methyl-2-propenoic acid methyl ester homopolymer PMM PMMA 2-Propenoic acid, 2-methyl-, methyl ester, homopolymer... 

P-Hydroxypropyl methacrylate. See 2-Hydroxypropyl methacrylate 2-Hydroxypropyl methacrylate homopolymer 2-Hydroxypropyl methacrylate polymer. See Poly (2-hydroxypropyl methacrylate) Hydroxypropyl methylcellulose CAS 9004-65-3 INS464 E464... 

---