POLY(ETHYLENE-CO-METHACRYLIC ACID), SODIUM SALT;ETHYLENE/METHACRYLIC ACID IONOMER;ETHYLENE/METHACRYLIC ACID IONOMER, SODIUM ION;ETHYLENE-METHACRYLIC ACID IONOMER, SODIUM ION IONOMER;ETHYLENE/METHACRYLIC ACID IONOMER, ZINC ION;ETHYLENE-METHACRYLIC ACID, ZINC SALT IONOMER;POLY(ETHYLENE-CO-METHACRYLIC ACID), SODI UM SALT, MELT INDEX 2.8;POLY(ETHYLENE-CO-METHACRYLIC ACID), SODI UM SALT, MELT INDEX 3.9