A new naphthalene-ring containing diamine, bis-[4-(5-amino-naphthalene-1-yloxy)-phenyl]-methanone was prepared from reaction of 5-amino-1-naphthol with 4,4-dichlorobenzophenone in the presence of K2CO3. A series of novel
polyamides were prepared by direct polycondensation of the diamine with various commercially available diacid chlorides including terephthaloyl chloride, isophthaloyl chloride, adipoyl chloride, and sebacoyl chloride. All the synthesized
polyamides showed good solubility in amide type solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide,
and N,N-dimethylformamide and they exhibited inherent viscosities in the range of 0.44–0.52 dL/g. According to the
DMTA analysis, the glass transition temperatures of the polyamides were found to be 131–187 °C. Thermogravimetric
analysis indicated that the polymers were stable up to 190 °C and the 10% weight loss temperatures were recorded in the
range of 350–418 °C in air atmosphere.