A3B-type miktoarm star polymer nanoassemblies prepared by reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization?
Polymer Chemistry Pub Date: 2022-09-08 DOI: 10.1039/D2PY00935H
Abstract
The construction of new macromolecular architecture is an effective route to obtain diverse self-assembled morphologies in polymerization-induced self-assembly (PISA). Herein, four macro-chain transfer agents (macro-CTAs) bearing three methoxy polyethylene glycol (mPEG) arms of increasing length were synthesized for the first time with great precision, and used in the RAFT mediated dispersion polymerization of styrene (St). The well-controlled polymerization of St was attained, yielding A3B-type miktoarm star (mPEG)3-PS nanoassemblies. A parallel comparison between the nanoassemblies of (mPEG750)3-PS and linear mPEG2000-b-PS indicated the remarkable effect of A3B architecture in delaying the micelle-worm and worm-vesicle transitions and promoting the formation of larger vesicles. In addition, unusual morphologies such as oversized vesicle, columnar vesicle and multi-lamellar vesicle were formed for (mPEG550)3-PS nanoassemblies.
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Journal Name：Polymer Chemistry
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CAS no.: 89640-58-4
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