Macromolecular compounds Communication 58 polyamides containing ether linkages in their macromolecular chains

Summary

• 1. A polyamide was preparedfrom diglycolic acid and 1,6-hexanediamine.

• 2. Polyamides were prepared from 3,3-(ethylenedioxy)bipropylamine and dicarboxylic acids, namely, adipic, azeile and sebacle.

• 3. Mixed polyamides were prepared from 6-caprolactam and 3,3′-(ethylendiaxy)bipropylamine adipate and from 1,6-hexanediamine adipate and 3,3−ethylenedioxy)bipropylamien adipate the tectanus being taken in various proportions.

• 4. It was shown that the introduction of an ether oxygen into the repeating melt of a polymaide macromolecule results in a lower melting point and a higher solubility, as compared with a polyamide having the same length of repeating unit, but not containing ether linkages.

• 5. It was found that an ether oxygen in the dicarboxylic acid residue brings about a much greater lowering of the melting point of the polyamide than an ether oxygen in the diamine residue.