Sono‐RAFT Polymerization in Aqueous Medium

The ultrasonic irradiation of aqueous solution is demonstrated to be a suitable source of initiating radicals for a controlled radical polymerization when conducted in the presence of a thiocarbonylthio‐containing reversible addition–fragmentation chain transfer (RAFT) agent. This allows for a highl...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2017-09, Vol.56 (40), p.12302-12306
Main Authors: McKenzie, Thomas G., Colombo, Enrico, Fu, Qiang, Ashokkumar, Muthupandian, Qiao, Greg G.
Format: Article
Language:English
Subjects:
Addition polymerization
Chain transfer
controlled polymerization
hydroxyl radicals
Irradiation
Monomers
Polymerization
Radiation
RAFT polymerization
Reagents
sonochemistry
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Summary:The ultrasonic irradiation of aqueous solution is demonstrated to be a suitable source of initiating radicals for a controlled radical polymerization when conducted in the presence of a thiocarbonylthio‐containing reversible addition–fragmentation chain transfer (RAFT) agent. This allows for a highly “green” method of externally regulated/controlled polymerization with a potentially broad scope for polymerizable monomers and/or polymer structures. Make some noise: A sonochemically induced RAFT polymerization with efficient temporal control is demonstrated using high‐frequency ultrasound. Unlike the low frequencies used in mechanically induced polymerizations the high frequency employed produces very little shear force, potentially avoiding chain‐breaking “depolymerization” events.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201706771