It can be seen from IR analysis that in comparison to hydrolyzate obtained by 1% base, it contains imines and aldehydes in addition to primary amines, carboxylic acids
, alcohol and phenol.
Also, shifts from 1586.4 to 1581.2 [cm.sup.-1] in [[upsilon].sub.s] ([COO.sup.-]), consistent with ionization of carboxylic acids
(21.) Egusa, S, Makauuchi, K, "Radiation-Initiated Emulsion Copolymerization of Styrene and Carboxylic Acid
Determination of Carboxylic Acid
End Groups Content
To the solution of HPC (2.0 g, 5.5 mmol) in DMAc, carboxylic acid
activating reagent p- toluenesulfonyl chloride (3.16 g, 16.5 mmol) was added in parts and dissolved.
A mixture of (4R)-13-thiazolidine-4- carboxylic acid
(0.1 g 0.75 mM) and anhydrous alcohol (10 eqs.) was stirred at 0o C.
It is comprised of an effective amount of one or more film forming methyl vinyl ethermaleic acid monobutyl or monoethyl ester copolymers comprising neutralind carboxylic acid
groups; an effective amount of one or more insect repellents selected from the group consisting of sec-butyl 2-(2-hydroxyethyl) piperidine-1-carboxylate, ethyl N-butyl-N- acetyl-3-aminopropionate, N, N-diethyl-meta-toluarn ide, p-menthane-3,8-diol, and mixtures thereof; an effective amount of one or more water miscible organic solvents selected from the group consisting of ethanol, 1-propanol, isopropanol and mixtures thereof; and water.
The EXY copolymer consists of 98 to 30 wt% ethylene, 2 to 30 wt% unsaturated carboxylic acid
, and 0 to 40 w% alkyl acrylate, and is partially neutralized with potassium cations.
Key statement: A tire component including a tire tread that comprises a vulcanized rubber, a rubber filler and a modified rubber, where the modified rubber i) contains pendent or functional groups that contain carboxylic acid
or anhydride groups, ii) has pendently grafted thereto a polymerized metal salt of an unsaturated carboxylic acid
, or iii) contains both i and ii.
Core-Corona polymeric nanoparticles comprised of polystyrene and plyethylene glycol (PEG) block co-polymers, and carboxylic acid
surface functionalities were synthesized using the specific macromomoners in emulsion polymerization.
Anandamide is derived from arachidonic acid, a 20-carbon carboxylic acid
that is the starting point for a cascade of complex biochemical reactions.