2-Acrylamido-2-methylpropanesulfonic acid AMPS

Morishima etal. [29 — 31] prepared amphiphilic copolymers of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) with various hydrophobic comonomers, and studied the tendency of their self-aggregation and the nature of the hydrophobic microdomains thus formed in aqueous solution. Chart 1 shows some of these amphiphilic copolymers. Here, the value of x indicates the mol% content of hydrophobic comonomer units. 

As has been described in Chapter 4, random copolymers of styrene (St) and 2-(acrylamido)-2-methylpropanesulfonic acid (AMPS) form a micelle-like microphase structure in aqueous solution [29]. The intramolecular hydrophobic aggregation of the St residues occurs when the St content in the copolymer is higher than ca. 50 mol%. When a small mole fraction of the phenanthrene (Phen) residues is covalently incorporated into such an amphiphilic polyelectrolyte, the Phen residues are hydrophobically encapsulated in the aggregate of the St residues. This kind of polymer system (poly(A/St/Phen), 29) can be prepared by free radical ter-polymerization of AMPS, St, and a small mole fraction of 9-vinylphenanthrene [119]. 

AMPS 2401 Monomer. See 2-Acrylamido-2-methylpropanesulfonic acid AMPS 2403 Monomer. See Sodium 2-acrylamido-2-methylpropanesulfonate AMPS 2404 Monomer. See 2-Acrylamido-2-methylpropanesulfonic acid AMPS 2405 Monomer. See Sodium 2-acrylamido-2-methylpropanesulfonate AMPS 2-AMPS. See 2-Acrylamido-2-methylpropanesulfonic acid Amquest EWS. See Edetic acid Amres 25-HP, Amres 8855, Amres 8860, Amres 8870, Amres C12, Amres C20, Amres C25, Amres C28. See Polyamide Amres C382. See Urea-formaldehyde resin Amres HS-30, Amres LA-12-2. See Polyamide... 

Acrylamido-2-methylpropanesulfonic acid AMPS 2401 Monomer AMPS 2404 Monomer 15217-42-2 Cobratec 40S Seetec BT-NA Sodium benzotriazole 15233-47-3 KD-110... 

Acrylamido-2-methylpropanesulfonic acid (AMPS) n. A solid aliphatic sulfonic-acid monomer produced by Lubrizol Corp. Its homopolymers are water-soluble and hydrolytically stable. It can be incorporated into other polymers by crosslinking. 

The gel was prepared by radical copolymerization at 323[K] for 48 hours. The total monomer concentration in N, N-dimethylformamide was kept at 3.0M in the presence of O.OIM N,N - methylenebisacrylamide (MBAA) as a cross-linking agent and O.OIM a, a - azobis (isobutyronitrUe) (AIBN) as an initiator. Monomers were 2 - acrylamido-2- methylpropanesulfonic acid (AMPS), n-stearyl acrylate (SA), and acrylic acid (AA) with the composition (AMPS SA AA) = (20 5 75). After the polymerizations, the gel was immersed in a large amount of pure water to remove un-reacted reagents until it reached an equilibrium... 

Due to sulfonic acid group in 2-acrylamido-2-methylpropanesulfonic acid (AMPS) molecules, homo-poly(AMPS), or (AMPS)-based co-polymers (Fig. 13.13) would be applicable to proton-conductive membranes for fuel cell applications [61]. The amphiphilic monomer can be easily polymerized with radical initiators and the price... 

Hydrolysis of amide groups to carboxylate is a major cause of instability in acrylamide-based polymers, especially at alkaline pH and high temperatures. The performance of oil-recovery polymers may be adversely affected by excessive hydrolysis, which can promote precipitation from sea water solution. This work has studied the effects of the sodium salts of acrylic acid and AMPS, 2-acrylamido-2-methylpropanesulfonic acid, as comonomers, on the rate of hydrolysis of polyacrylamides in alkaline solution at high temperatures. Copolymers were prepared containing from 0-53 mole % of the anionic comonomers, and hydrolyzed in aqueous solution at pH 8.5 at 90°C, 108°C and 120°C. The extent of hydrolysis was measured by a conductometric method, analyzing for the total carboxylate content. 

Materials. Monomers used in the preparation of the copolymers were as follows acrylamide as a 50% solution in water, stablized with cupric ion, supplied by American Cyanamid Company acrylic acid supplied by BASF and AMPS, 2-acrylamido-2-methylpropanesulfonic acid, (recrystallized grade) obtained from Lubrizol. The sodium salts of acrylic acid and AMPS were prepared by gradual neutralization of the monomers with sodium hydroxide solution, maintaining a temperature of 0 to 5°C, to give a final concentration of 50%. 

The rate of hydrolysis of acrylamide in copolymers with sodium acrylate or AMPS, 2-acrylamido-2-methylpropanesulfonic acid, decreased as the proportion of the anionic comonomers was increased. This effect was much more marked with AMPS than with sodium acrylate, and occurred at 90°, 108°, and 120°C. Typical results at 108°C [Figs. 1 and 2] show the increase in carboxylate content of acrylamide copolymers containing sodium acrylate and AMPS respectively. 

CAS 15214-89-8 EINECS/ELINCS 239-268-0 Synonyms 2-Acrylamido-2-methylpropane sulfonate 2-Acryloylamido-2-methylpropanesulfonic acid monomer AMPS 2-AMPS Empirical C7H13NO4S Formula H2C=CHC0NHC(CH3)2CH2S03H Properties M.w. 207.25 m.p. 195 C Toxicology Cancer suspect agent Precaution Corrosive... 

Shahinpoor [930], working at the "Artificial Muscles Research Institute", University of New Mexico, Albuquerque, NM, USA, fabricated devices for a wide variety of applications based on electrochemomechanical principles, from ion conducting polymers (not CPs). These polymers included poly(acrylic acid-bisacrylamide) (PAAM), poly(2-acrylamido-2-methylpropanesulfonic acid (Poly(AMPS)), and polyacrylonitrile (PAN). While these are not CPs, Shahinpoor also indicated that similar action could be expected, with minor modifications, from CPs such as poly (ary lene vinylenes) and poly(thienylene vinylenes). Shahinpoor typically used a metal (e.g. Pt) + ion conductive polymer composite in place of the customary bilayers. Some of the applications envisioned, or demonstrated for ion conductive polymers, included microactuators, motion sensors, accelerometers, oscillating artificial muscles, inchworms, cardiac>circulation assistants, noiseless propulsion swimming robots for military applications, fully constituted contractile artificial muscles, miniature flying machines, and electrically controllable adaptive optical lenses (Fig. 21-51. The potential military applications of these have fueled much interest recently [931]. 

Uses Emulsifier, hair conditioner, skin conditioner film modifier in cosmetics, hair care, skin care, nail preps. plasticizer tor hair resins AMPS 2-AMPS. See 2-Acrylamido-2-methylpropanesulfonic acid Amyl acid phosphate CAS 1278W6-7 UN 2819 (DOT)... 

Manuf./Distrib. ABCR Aldrich Fisher Scientific Ut Lubrizol Sigma-Aldrich Che-mie GmbH/Fluka Sigma Toagosei Trade Names AMPS 2401 Monomer AMPS 2404 Monomer 2-Acrylamido-2-methylpropane sulfonic acid sodium saK. See Sodium 2-acry-lamido-2-methylpropanesulfonate Acrylated epoxidized oil... 

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