| abstract |
Provided is a method of treating a vinyl aromatic resin (I) comprisingn (a) bringing the vinyl aromatic resin (I) into contact with an alcohol, and maintaining the contact between the vinyl aromatic resin (I) and the alcohol for 10 minutes or more, and (b) bringing the vinyl aromatic resin into contact with a base. wherein the vinyl aromatic resin (I), prior to steps (a) and (b), has benzyl chloride groups,n nbenzyl alcohol groups, and methylene bridge groups. |