Styrene-methacrylate copolymers

Okano, T., Katayama, M., and Shinohara, 1. The influence of hydrophobic and hydrophilic domains on water wettability of 2-hydrooxyethyl methacrylate/styrene copolymers, J. Appl. Polmer Sci, 1978, 22, 361-ill. 

Elastomeric graft copolymers of methyl methacrylate upon diene and acrylic rubbers were prepared by R. G. Bauer and co-workers. These elastomers are compatible with rigid methyl methacrylate-styrene copolymers of identical refractive index, yielding transparent polyblends. 

The importance of the graft handle on a 62/38 butadiene-methyl methacrylate rubber can be illustrated by its effect on the optical properties of the polyblend. From Table II it can be seen that the reduction in percent haze is dramatic for an increase of methyl methacrylate graft from 0 to 27% by weight, while there is no apparent change in the light transmission. The blend resin in this polyblend system was an 88-12 methyl methacrylate-styrene copolymer, and the total resin to backbone rubber ratio was kept at 2.5-1.0. The measured refractive indices are included for each component (the graft rubber and the blend resin). The difference in refractive index amounts to no more than 0.004 unit for any of the components. 

In Fig. 19 the spectra of the methyl methacrylate-styrene copolymers are shown, together with those of the homopolymers. The spectra of the homopolymers and of the copolymers from the 10 90 and 25 75 methyl methacrylate-styrene feed ratios are shown as recorded. For the other copolymers, the left-hand portion of the spectrum with the aromatic peaks is shown as recorded in carbon tetrachloride as solvent the remainder of the spectrum is shown as recorded in chloroform as solvent. 

Fig. 19. NMR spectra of solutions of methyl methacrylate-styrene copolymers and homopolymers, 0.10 g. in 0.5 ml. of CHClj or CCl (see text) with 2% tetramethylsilane as internal reference (r = 10.00) (a) polystyrene ( )10 90 (methyl methacrylate styrene mole ratio in monomer feed) (c) 25 75 [d) 50 50 e) 75 25 (/) 90 10 ...

The spectra of the methyl methacrylate-a-methylstyrene copolymers are similar to those of the methyl methacrylate-styrene copolymers and are not shown. The backbone methylene regions (8.1—8.6t) of the two comonomer units cannot be distinguished from each other. On the other hand, the methyl methacrylate a-methyl resonances are clearly multiple except at the two lowest values of f . In the spectrum of the 46 54 methyl methacrylate-a-methylstyrene copolymer, the shape of the methyl methacrylate a-methyl resonance is markedly altered from that observed at higher f , the peak at lower field (8.83r), which corresponds to isotactic triads in the homopolymers and is normally very small in free radical polymers, appears to be the most prominent. The a-methyl protons of the a-methylstyrene units appear at highest field, 9.6r—9.8t. Peak positions for the a-methylstyrene copolymers are... 

Fig. 20. NMR peak positions for methyl methacrylate-styrene copolymers and homopolymers in CHC13 or CCI4 (see text) as a function of fu the mole fraction of methyl methacrylate in the monomer feed open circles represent styrene protons filled circles represent methyl methacrylate protons half-moons are not yet assigned with certainty but are interpreted in the text as methyl methacrylate methoxyl protons...

Various methacrylic-styrene copolymers were prepared in which the reactivity of methacrylate monomers used in the first step decreases in the order MM A > BuMA > benzyl methacrylate. For instance, the bulk polymerization of MMA with such an aromatic azo compound proceeds via a living radical mechanism and the sterically crowded C-C(C6H5)3 terminal bond of polymethacrylate 37 can be cleaved thermally to produce a,co-diaromatic PMMA-h-PS block copolymers in 48-72% yield. 

Table IV. Polymerization of Methyl Methacrylate/Styrene Copolymer...

In solution and in the rubbery state, the thermal cis-trans recovery follows first-order kinetics in the glassy state, however, some azo groups react anomalously fast, others isomerize much slower, nearly as in solution. These data confirmed earlier observations of Paik and Morawetz in the case of methyl methacrylate-styrene copolymers containing azobenzene side groups. ... 

A significant number of works are concerned with the development of new membranes for the separation of mixtures of aromatic/alicyclic hydrocarbons [10,11,77-109]. For example, the following works can be mentioned. A mixture of cellulose ester and polyphosphonate ester (50 wt%) was used for benzene/cyclohexane separation [113]. High values of the separation factor and flux were achieved (up to 2 kg/m h). In order to achieve better fluxes and separation factors the attention was shifted to the modification of polymers by grafting technique. Grafted membranes were made of polyvinylidene fluoride with 4-vinyl pyridine or acrylic acid by irradiation [83]. 2-Hydroxy-3-(diethyl-amino) propyl methacrylate-styrene copolymer membranes with cyanuric chloride were prepared, which exhibited a superior separation factor /3p= 190 for a feed aromatic component concentration of 20 wt%. Graft copolymer membranes based on 2-hydroxyethyl methylacrylate-methylacrylate with thickness 10 pm were prepared [85]. The membranes yielded a flux of 0.7 kg/m h (for feed with 50 wt% of benzene) and excellent selectivity. Benzene concentration in permeate was about 100 wt%. A membrane based on polyvinyl alcohol and polyallyl amine was prepared [87]. For a feed containing 10 wt% of benzene the blend membrane yielded a flux of 1-3 kg/m h and a separation factor of 62. 

PVC MBS Butadiene methyl methacrylate styrene copolymer, MBS as Eeuer, 1958... 

Zerion Dow Chemical s trade name for its family of methyl methacrylate-styrene copolymer, zero absolute temperature See temperature, absolute zero. 

MORPHOLOGY AND PHASE RELATIONSHIPS OF LOW-MOLECULAR-WEIGHT POLYSTYRENE IN POLY (METHYL METHACRYLATE) AND METHYL METHACRYLATE/ STYRENE COPOLYMERS... 

Marrs B, Andrews R, Pienkowski D. Multiwall carbon nanotubes enhance the fatigue performance of physiologically maintained methyl methacrylate-styrene copolymer. Carbon 2007 45 2098-104. 

The process of particle interaction in an electric field can be evaluated quantitatively. Such an evaluation was performed in [207] for suspensions of a methyl methacrylate-styrene copolymer and titanium in butyl alcohol and heptane. The rate and extent of particle aggregation were monitored by determining the average radius of the resulting aggregates. 

Effect of styrene comonomer content on temperature of phase separation of polycarbonate blends with methyl methacrylate/styrene copolymers. 

PVC blended with BR-grafted-(methyl methacrylate)-styrene copolymer PVC MBS... 

A lipase-catalyzed acylation of comb-like methacrylate polymers was induced through OH groups in the side chains using the activated esters, vinyl acetate, phenyl acetate, 4-fluorophenyl acetate, and phenyl stearate, as acylating agents. The OH groups in the side chains of the methacrylate/styrene copolymer were... 

For polymers obtained by two or more kinds of alkene monomers by the addition reaction, a dash is always added between two monomers and the prefix poly is affixed to the word monomer name 1 + monomer name 2 + copolymer. For example, the copolymer of methyl methacrylate and styrene is named polyCmethyl methacrylate-styrene) or methyl methacrylate-styrene copolymer the polymer that is obtained by copolymerization of acrylonitrile, butadiene, and styrene is named polyCacrylonitrile-butadiene-styrene) or acrylonitrile-butadiene-styrene copolymer. ... 

An adipic acid-diethylene glycol copolymer, by treatment with a THF polymer or polypropylene glycol in the presence of chlorosulfonic acid, afforded polyether polyesters useful for the preparation of thermoplastic block copolyester rubbers and polyurethans. Strongly acid sulfonate derivatives of hydrophilic polymers may be prepared by reacting glycidyl methacrylate-ethylene dimethacrylate copolymer or ethylene dimethacrylate-glycidyl methacrylate-styrene copolymer with chlorosulfonic acid or oleum at 0-60 °C. ... 

Butyl methacrylate/styrene copolymer see Styrene/butyl methacrylate copolymer ... 

Fluorinated surfactants [e.g., CF3(CF2)8COOH] + nonhalogenated polymer (e.g., methyl methacrylate-A/-methylolacrylamide copolymer) in a cationic emulsion 2-40% epoxy resin, 60-90% water-insoluble copolymer containing 40-75% methacrylic acid (e.g., 68.5 5 26.5 methacrylic acid-methyl methacrylate-styrene copolymer)... 

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