Structure and properties of complex transition-metal (II) salts of ethylene-methacrylic acid copolymer with 1,3-bis (aminomethyl) cyclohexane

Thermal properties by differential scanning calorimetry, stiffness, and melt flow rate (MFR) were measured for the complex transition-metal (Zn(II), Cu(II), Mn(II), and Co(II)) salts of ethylene-methacrylic acid copolymer (EMAA) with 1,3-bis(aminomethyl)-cyclohexane (BAC). It was found that the strength of both ionic interactions of metal cations with carboxyl groups and coordination bonds of amino groups to metals differ among metal species. In particular, the complex Mn salts are weaker than the complex salts of the other transition metals, which corresponds with Irving-Williams series of stability constants of transition metal-ion complexes. Stiffness depends predominantly on the degree of crystallinity of ionic crystallites in ionic clusters, which depends on the ionic species.