A Strategy to Prepare Anemone-Shaped Polymer Brush by Controlled/Living Radical Polymerization

摘要

A well-defined diblock copolymer containing a block of alternately structured maleic anhydride (MAn) with 4-vinylbenzyl chloride (VBC) and PVBC block, P(MAn-alt-VBC)-b-PVBC, was prepared by a one-pot reversible addition-fragmentation chain transfer polymerization (RAFT) of MAn and VBC. This block copolymer can form stable inverse micelles in tetrahydrofuran after the MAn moieties being reacted with 2-mercaptoethyl amine. Thus silver ions were embedded in the inner core of the micelle, which were in-situ reduced to silver in the existence of NaBH_4 to obtain stable silver nanoparticles. The benzyl chloride groups on the nanoparticle surfaces were able to initiate the atom transfer radical polymerization (ATRP) of St to achieve a new type of Anemone-shaped polymer brush.