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Evolution of Morphology of POEGMA‐ b ‐PBzMA Nano‐Objects Formed by PISA
Author(s) -
Zhang Yaoming,
Wang Zongyu,
Matyjaszewski Krzysztof,
Pietrasik Joanna
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800331
Subject(s) - morphology (biology) , nano , polymer science , materials science , polymer chemistry , composite material , geology , paleontology
The evolution of particle morphology occurring during polymerization‐induced self‐assembly (PISA) of a block copolymer poly(oligo(ethylene glycol) methacrylate)‐ b ‐poly(benzyl methacrylate) (POEGMA‐ b ‐PBzMA) is studied. A well‐controlled reversible addition–fragmentation chain transfer (RAFT) polymerization yields nano‐objects with various morphologies: spheres, aggregates, worm‐like structures, and vesicles. A comparison of the morphology of the nano‐objects formed from two different chain‐length stabilizers established that the unreacted monomer played an important role during the morphology transitions, which is contrary to previous observations. In addition, morphology evolution to higher‐order structures could be attained simply by extending the reaction time, after reaching full monomer conversion.