MODIFICATION OF ETHYLENE-VINYL ACETATE COPOLYMER AND ITS EFFECTS ON THE PERMEABILITY OF SOME STEROIDS

摘要

Ethyleae-vinyl acetate copolymer ( EVA ) was mechanically blended with methylvinyl siloxane in order to increase the permeability of some steroids and to obtain an ideal material with membrane-controlled release of steroids from the intrauterine devices