Preparation and copolymerization of divalent metal salts of ethylene glycol–methacrylate–phthalate

Abstract

SynopsisDivalent metal salts of ethylene glycol-methacrylate-phthalate (EMP) were prepared by the reaction of EhlP and divalent metal ions in aqueous solution. The divalent metal salts obtained, except for the P b salt, have melting points which decrease in the order of Ca > Ba > Mg > Zn > Cd salt. The Zn and Cd salts are fairly soluble in most organic solvents. Therefore, the Zn salt and Cd salt were selected for the copolymerization with MMA, styrene (St), and hydroxyethyl methacrylate (HEMA). In the copolymerization, the rates of copolymerization increased markedly as the concentration of metal salts increased. Moreover, the systems containing MMA copolymerized more rapidly than those containing St. As for the physical properties of the copolymers obtained, compressive strength and Rockwell hardness were improved by introducingmetal salts into the polymers; and heat distortion temperature and tensileand flexuralstrengths were also improved by selecting the most suitable concentration of metal salts according to the species of metal salts and vinyl monomers. The TGA and the boiling water resistance of the copolymers were also discussed.

Structures and Optical Properties of Resins Containing Several Carboxylic Acids Neutralized with Barium Ion

“…7 On the other hand, ionically crosslinked polymers can be obtained by copolymerization of polymerizable monomers containing an ionic bond with vinyl monomers. 8 The physical properties of these polymers are also improved by introduction of metal salts. Recently, analogous with inorganic glasses, copolymers of polymerizable monomers containing heavy metal ions with vinyl monomers have been studied as optical materials having a high refractive index 9 or as transparent materials for radiation shielding plates.…”