Methacrylic acid polymer with

Amberlite IRP-88 methacrylic acid polymer with divinylben-zene, potassium salt polacrilinum kalii. 

Synonyms Amberlite IRP-64 methacrylic acid polymer with divinylbenzene 2-methyl-2-propenoic acid polymer with divinylbenzene. 

Methacrylic acid, 2-phenoxyethyl ester. See 2-Phenoxyethyl methacrylate Methacrylic acid polymer with divinyl benzene, potassium salt. See Polacrilin potassium Methacrylic acid, tetrahydrofurfuryl ester. See Tetrahydrofurfuryl methacrylate Methacrylic acid, 3-(trimethoxysilyl) propyl ester. See3-... 

Melt Viscosity. As shown in Tables 2 and 3, the melt viscosity of an acid copolymer increases dramatically as the fraction of neutralization is increased. The relationship for sodium ionomers is shown in Figure 4 (6). Melt viscosities for a series of sodium ionomers derived from an ethylene—3.5 mol % methacrylic acid polymer show that the increase is most pronounced at low shear rates and that the ionomers become increasingly non-Newtonian with increasing neutralization (9). The activation energy for viscous flow has been reported to be somewhat higher in ionomers than in related acidic... 

Methacrylic acid polymer is iasoluble ia the monomer, which may result ia the plugging of transfer lines and vent systems. Polymers of the lower alkyl esters are often soluble ia the parent monomer and may be detected by an iacrease ia solution viscosity. Alternatively, dilution with a nonsolvent for the polymer such as methanol results ia the formation of haze and can be used as a diagnostic tool for determining presence of polymer. 

Polymers of methacrylic acid or maleic acid, either alone or as a blend or copolymer with the sulphonated aryl-formaldehyde condensation products, have also been evaluated as stain-blocking chemicals [508,509]. An interesting development is the use of a polystyrene-maleic acid copolymer, this being unusual because of the absence of sulphonic acid groups [508,510]. Although the maleic and methacrylic acid polymers do not have the durability of the conventional syntans, they have the advantage that they are non-yellowing. 

Chiral induction was observed in the cyclopolymerization of optically active dimethacrylate monomer 42 [88], Free-radical polymerization of 42 proceeds via a cycliza-tion mechanism, and the resulting polymer can be converted to PMMA. The PMMA exhibits optical activity ([ct]405 -4.3°) and the tacticity of the polymer (mm/mr/rr =12/49 / 39) is different from that of free-radical polymerization products of MMA. Free-radical polymerization of vinyl ethers with a chiral binaphthyl structure also involved chiral induction [91,92]. Optically active PMMA was also synthesized through the polymerization of methacrylic acid complexed with chitosan and conversion of the resulting polymer into methyl ester [93,94]. 

The USPNF 23 describes methacrylic acid copolymer as a fully polymerized copolymer of methacrylic acid and an acrylic or methacrylic ester. Three types of copolymers, namely Type A, Type B, and Type C, are defined in the monograph. They vary in their methacrylic acid content and solution viscosity. Type C may contain suitable surface-active agents. Two additional polymers, Type A (Eudragit RE) and Type B (Eudragit RS), also referred to as ammonio methacrylate copolymers, consisting of fully polymerized copolymers of acrylic and methacrylic acid esters with a low content of quaternary ammonium groups, are also described in the USPNF 23. A further monograph for an aqueous dispersion of Type C methacrylic acid copolymer is also defined see Section 9. 

Copolymers with silanes have attracted much interest. These include a range of methacrylic acid copolymers with disilanes, secondary silanes, phenylsi-lane and fumarate terminated poly(dimethylsiloxanes). A platinum(II) bis(a-cetylacetonato) catalyst has been found to be highly effective for enhancing the activities of hydride and vinyl polymer end groups in step polymerisation reactions. ... 

In experiments conducted to obtain controlled sizes of filler particles formed in a matrix, several polymers were used as the matrix. Copolymers were synthesized from polyethylene oxide (does not interact with CaCOs) and poly(methacrylic acid) (reacts with in situ crystallizing CaCOj). In the presence of polyethylene oxide, crystals grew to similar sizes as without any polymer. The presence of the poly(methacrylic acid) crystal size of CaCOa was reduced by a factor 5 to 10 depending on the concentration of the filler precursor. 

Most attempts in the past to prepare higher molecular weight ultraviolet stabilizers have used the reaction of a preformed polymer with an ultraviolet-absorbing small molecule, e.g., of polymeric methacrylic acid salts with the 2-bromoethyl ether of the 1-hydroxyl group of 2,1-dihydroxybenzophenone (2). 

This conclusion has been reached in the copolymerization of acrylic acid (AA) and methacrylic acid (MAA) with N-vinylpyrrolidone (34, 35) (a monomer noted for its thermal stability (36) and discussed in Chapter 9) and with acrylamide (37). The incorporation of the acid monomer in the copolymer decreases with increasing solution pH. The r values with MAA are particularly low at pH <5 because of hydrophobic associations of the methyl groups. Laser-Raman studies (38) have also indicated intramolecular association among the methyl groups of syndiotactic poly(methacrylic acid) (PMAA) in aqueous solution. The addition of NaCl, at a moderate pH, increases the amount of neutralized, weak acid monomer incorporated (Table III). A more gradual change is observed with pH in the MAA-AM combination than in the AA-AM pair because of the hydrophobic interactions cited. The relationships are nearly quantitative with the ionization of the acids as reflected by the pK of the monomer and polymer acid sequences. 

SAL Salgado-Rodriguez, R., Licea-Claverie, A., and Amdt, K.F., Random copolymers of A-isopropylaciylamide and methacrylic acid monomers with hydrophobie spaeers pH-tnnable temperature sensitive materials, Eur. Polym. J., 40, 1931, 2004. 

Neutralization of ethylene copolymers containing up to 5%-10% acrylic or methacrylic acid copolymer with a metal salt such as the acetate or oxide of zinc, magnesium, and barium yields products referred to as ionomers. (Commercial products may contain univalent as well as divalent metal salts.) lonomers are marked by Du Pont under the trade name Surlyn. These have interesting properties compared with the nonionized copolymer. Introduction of ions causes disordering of the semicrystalline structure, which makes the polymer transparent. lonomers act like reversibly cross-linked thermoplastics as a result of microphase separation between ionic metal carboxylate and nonpolar hydrocarbon segments. The... 

Methacrylic acid, ethyl ester. See Ethyl methacrylate Methacrylic acid isobornyl ester. See Isobornyl methacrylate Methacrylic acid, isobutyl ester. See Isobutyl methacrylate Methacrylic acid, isodecyl ester. See Isodecyl methacrylate Methacrylic acid lauryl ester. See Lauryl methacrylate Methacrylic acid, methyl ester. See Methyl methacrylate Methacrylic acid methyl ester polymers. See Polymethyl methacrylate Methacrylic acid, monoester with 1,2-propanediol. See Flydroxypropyl methacrylate... 

Methacrylic acid methyl ester polymers. See Polymethyl methacrylate Methacrylic acid, monoester with 1,2-propanediol. See Hydroxypropyl methacrylate... 

The ability of thiol-ene click chemistry to retain high efficiency under the most benign reaction conditions was exempHfied by Ritter and Bardts, in the preparation of hydrogels based on methacryhc acid [224]. In this study, poly(methacrylic acid) polymers were modified with cysteamine and aUyl amine to afford complementary thiol-ene reactive polymer chains. Solutions of the polymer pairs in water were mixed in the presence of a radical initiator, and the formation of a highly elastic gel was observed within only 2 h at room temperature. The authors noted that this approach might have broad application for a rapid and straightforward access to hydrogel materials for which the properties could easily be tailored by the choice of the amine modifiers. 

---