Abstract
Copolyesteramides were prepared from β-hydroxy ethyl ammonium sebacate and a salt or monomer such as aromatic amino acid or aromatic hydroxy acid. The salt was prepared from monomer such as diamine or dicarboxylic acid containing aromatic nuclei and monomer of aliphatic dicarboxylic acid, aliphatic diamine or ethanol amine.m-xylylene diamine, p-xylylene diamine and p-phenylene ββ'diethyl amine were employed as. aromatic diamines. Terephthalic acid, isophthalic acid and p-phenylene diacetic acid were employed as aromatic dicarboxylic acids. p-amino benzoic acid and p-hydroxy benzoic acid were employed as aromatic amino acid and aromatic hydroxy acid respectively.The properties of copolyesteramides such as fibre forming and melting point were examined, Except for copolymer system of p-xylylene diamine and p-phenylene ββ'diethyl amine, ideal copolymer systems could not be prepared from above compounds because of disappearance of the fibre forming properties. In the case of copolymer system of p-aromatic diamine homologues, it was found that melting points of the copolymers are almost in a straight line drawn between melting points of two pure polymers, showing the maximum difference in almost 1:1 copolymerization ratio. Melting points are always higher and the difference is slight. The fibre forming and hot drawing properties of the copolymer system are satisfiable.
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