Based on the principle of non-equal reactivity of functional groups (NERFG), a hyperbranched polymer was synthesized from commercially available monomers. In this work, asymmetrical hyperbranched polyamido- ester was prepared by using benzene-1, 2,4-tricarboxylic acid-1,2- anhydride and N-(2-hydroxyethyl) piperazine as raw materials depending on the different reactivity between amino and hydroxyl groups. The structure of the resulting polymer was confirmed by FTIR and !H NMR spectroscopy. The hyperbranched polymer holds alternating amido, tertiary amino and ester units in its macromolecular frame, and is highly soluble in water. The simplicity of the synthesis process and availability of the raw materials would make this approach attractive for the large-scale fabrication of hyperbranched polymers.

Key words: BENZENE P, BRANCHED POLYMER, CARBOXYLIC ACID ANHYDRIDE, PIPERAZINE P, POLYAMIDE, IR, NMR, TECHNOLOGY