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Ionic polymers are polymers, either organic or inorganic, which contain both covalent and ionic bonds in their molecular structure. This is the basic characteristic feature that distinguishes the ionic polymers from their conventional counterparts. There is no accepted definition of, or method of classifying, ionic polymers. The few previous classifications were not only restricted to particular groups but also cannot completely accommodate the current existing range of ionic polymers. This work considers the existing modes of classification of ionic polymers as well as the range of ionic polymers in the establishment of a simple and straightforward classification. It ensures, firstly, that a reflection of their different background structures can always be obtained; secondly, materials with similar properties or behavior are brought together; and lastly, it enables the prediction of new entries that might subsequently have to be included in the scheme.

Groups IIA [i.e., Mg(2+), Ca(2+), and Ba(2+)] and IIB [i.e., Zn(2+), Cd(2+), and Pb(2+)] dicarboxylates were obtained by precipitation from aqueous solution. The salts were melted, quenched (when necessary), and characterized. Except for Pb(2+), the salts were highly viscous. The molten salts which were characterized by the presence of ionic carboxylates in their molecular structure exhibited polymeric structure resulting from a dynamic association equilibrium due to the ionic character of the metal ions. The ionic melts possessed relatively high melting temperatures and thermal stabilities, both of which have been found to be functions of the ionic character of the metal ions.

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Halatopolymers belong to a group of ion‐containing materials that display both salt‐ and polymer‐like properties. Their mode of synthesis and other characteristics have been widely reported. This work considers the various reports as defined by both polymeric structure and by the metal ions involved in formation. Also provided are data on other characteristics by which this group of materials can be identified. Synthesis of simple nonpolymeric backbone structures can give highly crystalline salts, which become more amorphous after thermal treatment. While the polymeric backbone‐structured halatopolymers are soluble, the nonpolymeric backbone counterparts are generally insoluble. The halatopolymers exhibit relatively high thermal stabilities.