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Toward sulfur-free RAFT polymerization induced self-assembly
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Lotierzo, Andrea, Schofield, Ryan M. and Bon, Stefan Antonius Franciscus (2017) Toward sulfur-free RAFT polymerization induced self-assembly. ACS Macro Letters, 6 (12). pp. 1438-1443. doi:10.1021/acsmacrolett.7b00857 ISSN 2161-1653.
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Official URL: https://doi.org/10.1021/acsmacrolett.7b00857
Abstract
Polymerization induced self-assembly (PISA) using methacrylate-based macromonomers as RAFT agents is an unexplored, attractive route to make self-assembled colloidal objects. The use of this class of RAFT-agents in heterogeneous polymerizations is however not trivial, because of their inherent low reactivity. In this work we demonstrate that two obstacles need to be overcome, one being control of chain-growth (propagation), the other monomer partitioning. Batch dispersion polymerizations of hydroxypropyl methacrylate in the presence of poly(glycerol methacrylate) macromonomers in water showed limited control of chain-growth. Semicontinuous experiments whereby monomer was fed improved results only to some extent. Control of propagation is essential for PISA to allow for dynamic rearrangement of colloidal structures. We tackled the problem of monomer partitioning (caused by uncontrolled particle nucleation) by starting the polymerization with an amphiphilic thermoresponsive diblock copolymer, already “phase-separated” from solution. TEM analysis showed that PISA was successful and that different particle morphologies were obtained throughout the polymerization.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QD Chemistry | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Library of Congress Subject Headings (LCSH): | Addition polymerization, Self-assembly (Chemistry), Fragmentation reactions | ||||||||
Journal or Publication Title: | ACS Macro Letters | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 2161-1653 | ||||||||
Official Date: | 19 December 2017 | ||||||||
Dates: |
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Volume: | 6 | ||||||||
Number: | 12 | ||||||||
Page Range: | pp. 1438-1443 | ||||||||
DOI: | 10.1021/acsmacrolett.7b00857 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 14 December 2017 | ||||||||
Date of first compliant Open Access: | 6 December 2018 | ||||||||
RIOXX Funder/Project Grant: |
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