Aromatic hyperbranched polymers show some of characteristic properties originated from dendritic architecture even if the monomers are composed of rigid aromatic rings and spacers. Preparation and properties of aromatic hyperbranched polyamides and polyimides have been reviewed in this article. The soluble hyperbranched polyamides and polyimides have been prepared by the self-polycondensation of AB
2 type monomers. The monomer structure influences the degree of branching of the resulting hyperbranched polymers. The properties of hyperbranched polyamides and polyimides can be changed in some extent by the chemical modification of end functional groups. Unique electrical and optical properties have also been observed for hyperbranched polyimides. The polymerization of commercially available A
2 and B
3 monomers also gives aromatic hyperbranched polymers. Soluble hyperbranched polymers can be isolated by the careful control of the polymerization reactions in order to avoid gelation. The solution viscosity of the hyperbranched polymers prepared from A
2 and B
3 monomers is often high due to partial intra/inter molecular crosslinking. The copolymerization of AB and AB
2 monomers allows controlling the branching density of the resulting hyperbranched copolymers. It has been shown for hyperbranched polyamides and polyimides that the small amount of the branching component (AB
2 monomer) significantly influences the properties of the resulting copolymers.
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