Copolymers methylmethacrylate

H Jagt, Y Dirix, R Hikmet, and C Bastiaansen, Linear polarizers based on polymer blends oriented blends of poly(ethylene-2,6-naphthalenedicarboxylate) and a poly(styrene/methylmethacrylate) copolymer, Jpn. J. Appl. Phys., 37 4389-4392, 1998. 

Non-aqueous (or-oil-in-oil) emulsions, where the phases are two immiscible organic liquids, have received relatively little attention in the literature. Riess et al. [116-119] have studied the stabilisation of waterless systems with block and graft copolymers, where one of the liquids is a good solvent for one of the blocks and a non-solvent for the other, and vice versa. Thus, poly(styrene-b-methylmethacrylate) copolymers could emulsify acetonitrile/cyclohexane mixtures, and poly(styrene-b-isoprene) was effective for DMF/hexane systems [116]. These, however, are not HIPE systems. 

Several reports have appeared in which the UV absorption spectrum of PS was found to be qualitatively similar to an alkyl benzene model compound. Vala and Rice15> demonstrated the similarity between atactic PS and ethyl benzene this was confirmed for atactic PS in cyclohexane by Hirayama 16) and in tetrahydrofuran by Abuin 17>. Bovey and co-workers20) found that absorbance spectra for isotactic PS, atactic PS, and styrene-methylmethacrylate copolymers in 1,2-dichloroethane were roughly similar to that of toluene. 

Since the data for the styrene-methylmethacrylate copolymer show that Tcr and ycr occur (Figure 1) very close to the Newtonian range, this empirical procedure should give reliable values of zero shear viscosity. 

Qian, F., et al. (2006), Preparation, characterization and enzyme inhibition of methylmethacrylate copolymer nanoparticles with different hydrophilic polymeric chains, Eur. Polym. /., 44(7), 1653-1661. 

Polymer-based materials have been on the market for more than 30 years. Crosslinked styrene-divinylbenzene and methylmethacrylate copolymers are the most widely used. These materials show high pH stabihty and chemical inertness. Their rigidity and resistance to the swelhng in different mobile phases is dependent on the degree of crosslinkage. 

Table 9. Rate-constants for decay in acenaphthylene - methylmethacrylate copolymers.

Baert, L. Remon, J.P. Water vapour permeation of aqueous based ethylacrylate methylmethacrylate copolymer films. Int. J. Pharm. 1993, 99, 181-187. 

A membrane-controlled drug delivery device was developed to release tetracycline at zero-order rates. The tetracycline delivery vehicle Is a trllamlnate disk consisting of core and coating membranes fabricated from a series of 2-hydroxyethyl-methacrylate and methylmethacrylate copolymers. Appropriate adjustment of the monomer composition ratio Imparts a hydrophobic nature to the copolymer outer coating membrane (relative to the... 

In an earlier paper we have reported on the photophysical behavior of alternating 2-vlnylnaphthalene - methacrylic acid or methylmethacrylate copolymers (P(2VN-alt-MA) or P(2VN-alt-MMA)). In agreement with earlier reports, the alternating copolymers... 

Fig. 7. Schematic representation of the cross-section of heat-treated (130 °C) acrylic fibers (from AN/ methylmethacrylate copolymer) a) under nitrogen, b) with water vapor. (Adapted from electron-micrographs of Sotton et ai.72 )...

RednQR. [Rdim Haas] Methylmethacrylate copolymer or polyvinyl imida-z( ium acetate theni astic for barrier coatings, as modifier. 

We may find confirmation for our statement about the thermodynamic incompatibility of linear polystyrene with the styrene-DVB copolymer in experiments by Wong et al. [269]. These authors reported similarities in the phase separation power of linear polystyrene and that of linear styrene-methylmethacrylate copolymer, the latter being a priori incompatible with the styrene-DVB network. Complete incompatibility of polystyrene with linear polydimethylsiloxane facihtates phase separation and results in the formation of a porous styrene-DVB network on adding as little as 0.5-1% of the above porogen to the initial comonomer mixture (Fig. 3.2, curves 4). It is also not surprising that the porosity of copolymers induced by linear polystyrene and linear polydimethylsiloxane is almost the same when the DVB content exceeds 10%. At a DVB content that hi, the network formed differs fundamentally from linear polystyrene, as from any alien polymer. 

This process has several stages. In the first stage, the mold is heated to 70"C. In the second stage, the mold is immersed in plastisol after withdrawing, plastisol is cured in a 250°C oven for 60 sec to fabricate a 0.1 mm thick layer of PVC. The mold is then immersed in methylmethacrylate copolymer emulsion and after withdrawing from solution heated for 10 min. in a 200"C oven. A 5 im thick layer is formed. The glove is then stripped from the mold and inverted thus the antimicrobial layer is inside the glove. 

S tyrene- acrylonitrile Styrene-butadiene elastomers Styrene-methylmethacrylate copolymer Sulfo-ethylene-propylene-diene monomer ionomers Syndiotactic polystyrene... 

Ki-aton G1600 SEES Perfluorinated ionomers Phenolic resins Polystyrene, head-to-head Poly(yinyl chloride), head-to-head S tyrene- acrylonitrile Styrene-butadiene elastomers Styrene-methylmethacrylate copolymer Sulfo-ethylene-propylene-diene monomer ionomers Vinylidene fluoride-hexafluoropropylene elastomers Chemigum... 

V Polystyrene - poly(methylmethacrylate) copolymer (graft comb)... 

Acramin Binder 27 Acramin Binder 1900D Butyl acrylate/methyl acrylate/ methylmethacrylate copolymer. Ethyl acrylate/methyl methacrylate copolymer binder, iaminating... 

Figure 13.16. Percentage of Na Diclofenac released from controlled release tablet vs. time for different concentrations of dibutyl phthalate used to plasticize methylmethacrylate copolymer (Eudragit RisPN). [Data from Mulye N, US Patent 6,437,000.]...

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