Morphology transitions in RAFT polymerization

摘要: Polymerization-induced self-assembly and re-organization (PISR) was used to prepare polymeric nanostructured materials with a variety of morphologies. Reversible addition-fragmentation chain transfer (RAFT) polymerization styrene in selective solvent, methanol, carried out using cyanoisopropyl dithiobenzoate-terminated poly(2-dimethylaminoethyl methacrylate) (PDMAEMA-DBT) as the macro agent stabilizer for investigation factors influencing formation Various morphologies, including spherical micelles, nanostrings, vesicles large compound vesicles, different shapes were obtained by changing feed ratios reaction conditions. The sequential morphologic transitions from micelles via increasing length ratio hydrophobic block hydrophilic one same system observed first time. This approach can be performed at high concentration, thus it scaled up reproducible preparation relatively volume.