Synthesis and characterization of aliphatic‐aromatic poly(ether amide)s

Four aromatic diamines containing aliphatic spacers and meta and para oriented oxy-phenylene rings, and their corresponding hydrochlorides, were combined with isophthaloyl chloride (IPC) and terephthaloyl chloride (TPC) to give high molecular weight polyamides by interfacial and low-temperature solution methods. The synthesis and characterization of monomers and polymers are reported, and the differences observed in polycondensation yields, molecular weights and molecular weight distributions, as a function of the method of synthesis, are discussed. Values of number-average molecular weight (M n ) up to 8 x 10 4 g/mol and weight-average molecular weight (M ω ) up to 1 x 10 5 g/mol could be measured by gel permeation chromatography using aromatic polyamide standards, and values of M n up to 2 x 10 5 g/mol and M ω up to 3.6 x 10 5 g/mol by using polystyrene standards.