The polyesteramide (PEA) is synthesized by two methods.One of them is two-step method
firstly BAET and BHET are synthesized from the reactions of DMT (dimethyl therephthalate) with EA (ethanolamine) and TPA(terephthalic acid) with EG (ethylene glycol)
reapectively;then BAET and BHET are condensation copolymerized.The chemical structure of the BAET is characterized by IR
IH--NMR and GC--MS.Another is one--step method that is synthesized by copolycondensation of DMT
EG and EA directly.All of the copolymers are characterized by the determination of nitrogen content