| abstract |
A block copolymer of a hydrophobic block of one or more hydrophobic monomersnand a hydrophilic block of one or more hydrophilic monomers is preparednby polymerizing a hydrophobic monomer to prepare the hydrophobic block,nusing a free radical polymerization process using a stable free radical agent,npreserving a stabilized active polymerization site on the hydrophobic block;nadding a hydrophilic monomer to the stabilized active hydrophobic block; andnfurther reacting the mixture to effect polymerization of the hydrophilic monomer.nThe polymerization of the hydrophilic monomer is conducted in an amidicnsolvent in which the hydrophobic block and the hydrophilic monomer arensoluble. |