Adipic acid monoamide

Succinic acid reacts with urea in aqeous solution to give a 2 1 compound having mp 141°C (116,117), which has low solubiUty in water. A method for the recovery of succinic acid from the wastes from adipic acid manufacture is based on this reaction (118,119). The monoamide succinamic acid [638-32-4] NH2COCH2CH2COOH, is obtained from ammonia and the anhydride or by partial hydrolysis of succinknide. The diamide succinamide [110-14-3], (CH2C0NH2)2, nip 268—270°C, is obtained from succinyl chloride and ammonia or by partial hydrolysis of succinonitrile. Heating succinknide with a primary amine gives A/-alkylsucckiknides (eq. 9). 

Since most (though not all) of the step polymerization processes involve polycondensation (repeated condensation) reactions, the terms step polymerization and condensation polymerization are often used synonymously. Consider, for example, the synthesis of a polyamide, i.e., a polymer with amide ( ONH-) as the characteristic linkage. If we start with, say, hexamethylenediamine and adipic acid as reactants, the first step in the formation of the polymer (nylon) is the following reaction producing a monoamide ... 

The oxidative thermal stability is markedly affected by the concentration of both carboxylic and basic end groups. Carboxylic acid groups initiate the homolytic decomposition of 6-hydroperoxy-6-hexanelactam. Thus, alkoxyl and hydroxyl radicals are formed as intermediates. Eventually, the monoamide of adipic acid is formed. PAs with carboxylic end groups are oxidized in a similar way. The rate of oxidization increases with the content of carboxylic groups. ... 

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