In this paper

the synthesis of the anionic ionomers

such as ionomers with pendent carboxyl

sulfo or phospho groups

was summarized based on the prior work. And some essential morphology models of the ionomer and their infects in application were summarized. For the structure of the ionomer

the studies of microphase separation and some breakthroughs gained by new electron microscopy technology were introduced briefly. As for the solution properties of ionomer

some relative studies of ionomer solution viscosity and the solvent functionality were discussed. And the influence of the amount and type of the ionic groups on the mechanical properties and glass transition temperature was summarized. The further research of the ionomers needed to approach was also indicated.