Abstract
1. An investigation was made of the dependence of the melting points of ternary and quarternary polyamides on their quantitative composition, the reactants in the systems studied being the 1,6-hexanediamine salts of succinic, adipic, azelaic, and sebacic acids and 6-caprolactam, taken in various proportions. 2. The extent to which hydrogen bonding occurs in these polymers was calculated. 3. It was proved tht the melting points of mixed polyamides derived from straight-chain aliphatic diamines and dicarboxylic acids and not containing side chains, substituents, or hetero atoms cannot be below the melting point of polyethylene.
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