Methyl polyethylene glycol

PEG)-modified ligands [e.g. polyethylene glycol triphenylphosphine oxide (PETPPO) and methyl polyethylene glycol diphenylphosphine (MDPP)— Pig. 5] was investigated. 

Chem. Descrip. Methyl polyethylene glycol ester Uses Surfactant for household/industrial detergents and cleaners, textile applies., paints/coatings, lubricants, emulsion polymerization, and metal treatment... 

Hyun et al have decribed synthesis of PTMC-PEG-PTMC triblock and methyl polyethylene glycol (MEPEG)-PTMC diblock copolymers according to the cationic polymerization mechanism using PEG or monomethoxy-PEG and HCl OEt2 as an initiation system for TMC polymerization. 

Nonionic hydrophilic Polyethylene glycol Soluble starch, methyl cellulose, pullulan Dextran Above samples plus hydroxyethyl cellulose, polyvinyl alcohol, polyacrylamide Distilled water 0.01 N NaOH DMSO Buffer or salt solution (e.g., 0.1— 0.5 M NaNO,)... 

IR analysis can also be used quantitatively to determine the EO-PO ratio [12]. Using mixtures of polyethylene glycol and polypropyene glycol as calibration standards, the ratio of two absorbances, one due to the methyl group of the PO unit (e.g., the C-H stretch band at 2975 cm ) and one due to the methylene group (e.g., the C-H stretch band at 2870 cm ), are plotted against percent of PO content. The ratio of the same two absorbances taken from the IR spectrum of a poloxamer may then be used to determine its percent of PO content by interpolation. 

Polyethylene glycols such as PEG-6 methyl ether may be added as either surfactants, detergents, emulsifiers (to make the dyes and perfumes blend evenly), or thickeners. 

Laundry detergent may also contain polyethylene glycol, a polymer that prevents dirt from redepositing on the clothes. This function used to be the job of phosphates. Another polymer used for this purpose is carboxy methyl cellulose, which is derived from natural cellulose but is very soluble in water. 

PEG. See polyethylene glycol esters PEG-5 cocamide, 136, 201 PEG-6 methyl ether, 209 PEG-n. See polyethylene glycol pellagra, 188 pentane, 226-227... 

N-Methyl-2-pyrrolidinone 2 KHSO5 KHSO4 K2SO4 Polymeric backbone Pyridinium chlorochromate Pyridinium dichromate Polyethylene glycol... 

II. B polyethylene glycol, ethylene oxide, polystyrene, diisocyanates (urethanes), polyvinylchloride, chloroprene, THF, diglycolide, dilac-tide, <5-valerolactone, substituted e-caprolactones, 4-vinyl anisole, styrene, methyl methacrylate, and vinyl acetate. In addition to these species, many copolymers have been prepared from oligomers of PCL. In particular, a variety of polyester-urethanes have been synthesized from hydroxy-terminated PCL, some of which have achieved commercial status (9). Graft copolymers with acrylic acid, acrylonitrile, and styrene have been prepared using PCL as the backbone polymer (60). 

The improvement of its activity and stability has been approach by the use of GE tools (see Refs. [398] and [399], respectively). A process drawback is the fact that the oxidation of hydrophobic compounds in an organic solvent becomes limited by substrate partition between the active site of the enzyme and the bulk solvent [398], To provide the biocatalyst soluble with a hydrophobic active site access, keeping its solubility in organic solvents, a double chemical modification on horse heart cytochrome c has been performed [400,401], First, to increase the active-site hydrophobicity, a methyl esterification on the heme propionates was performed. Then, polyethylene glycol (PEG) was used for a surface modification of the protein, yielding a protein-polymer conjugates that are soluble in organic solvents. 

Sepasolv MPE [Methyl isopropyl ester] A variation on the Selexol process, using the methyl isopropyl ethers of polyethylene glycol as the solvent. Developed by BASF. Four commercial plants were operating in 1985, removing hydrogen sulfide from natural gas. Wolfer, W., Hydrocarbon Process., 1982,61(11), 193. 

Chiral bisoxazolines (box) ligands have been attached to a polyethylene glycol (PEG) matrix 25.24 The supported ligands were tested on a variety of reactions for their enantioselectivity. The carbonyl-ene reaction between a-methyl styrene or methylene cyclohexane (26, Equation (15)) and ethylglyoxalate 12 afforded the corresponding ene adduct 27 in 96% and 91% yield and 95% and 85% ee, respectively. 

The OFRR interior surface is then coated with various polymers, such as moderately polar methyl phenyl polysiloxane (OV-17) or highly polar polyethylene glycol (PEG), for the detection of different types of chemical vapors. The coating procedures are adapted from well-developed static coating procedures for GC... 

Hunter DM, Timerding BL, Leonard RB, et al. 1992. Effects of isopropyl alcohol, ethanol, and polyethylene glycol/industrial methylated spirits in the treatment of acute phenol bums. Ann Emerg Med 21 1303-1307. 

Pullin TG, Pinkerton MN, Johnson RV, et al. 1978. Decontamination of the skin of swine following phenol exposure A comparison of the relative efficacy of water versus polyethylene glycol/industrial methylated spirits. Toxicol Appl Pharmacol 43 199-206. 

Nitrogen alkylation occurs easily under sonochemical conditions [128], Indole and carbazole undergo N-alkylation with increased rates and yields under sonication in the presence of polyethylene glycol methyl ether as PTC. No reaction occurs in the absence of the PTC (Eq. 3.28). 

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