Abstract
This atricle is concerned with the reactions of the phosphonium salts derived from the oxidation of phosphites and from nonoxidative cleavage of the P-O- (C) bonds facilitated by tertiary amines and metal salts, and with their application to polymer syntheses by the direct polycondensations of dicarboxylic acids and diamines, of free amino acids, and of carbon dioxide and diamines. Initiation and propagation in the polycondensation and their significant effects on the molecular weight of the resulting polymers are discussed. The preparation of polyesters by use of phosphorus chlorides is also described.
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