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Sequence-controlled methacrylic multiblock copolymers : expanding the scope of sulfur-free RAFT

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Engelis, Nikolaos, Anastasaki, Athina, Whitfield, Richard, Jones, Glen R., Liarou, Evelina, Nikolaou, Vasiliki, Nurumbetov, Gabit and Haddleton, David M. (2018) Sequence-controlled methacrylic multiblock copolymers : expanding the scope of sulfur-free RAFT. Macromolecules, 51 (2). pp. 336-342. doi:10.1021/acs.macromol.7b01987

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Official URL: http://doi.org/10.1021/acs.macromol.7b01987

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Abstract

Sulfur-free reversible addition–fragmentation transfer polymerization (SF-RAFT) in emulsion allows access to the synthesis of sequence-controlled methacrylic multiblock copolymers. Herein, we expand the scope of SF-RAFT emulsion polymerization by utilizing four different macrochain transfer agents (mCTA) to mediate the synthesis of diblocks and sequence-controlled methacrylic multiblock copolymers. Poly(methyl methacrylate) (pMMA), poly(butyl methacrylate) (pBMA), poly(ethyl methacrylate) (pEMA), and poly(benzyl methacrylate) (pBzMA) of a similar Mn (∼4300 g mol–1) were successfully synthesized via catalytic chain transfer polymerization (CCTP) in emulsion. The capability of these mCTAs to act as macroinitiators was investigated through the synthesis of “in situ” diblock copolymers and was then expanded to the synthesis of deca- and hexablock multiblock copolymers with varying degrees of polymerization (DPn = 10–50 per block, Mn,total = 7000–55 000 g mol–1), yielding well-defined copolymers with controlled molecular weights, quantitative conversions (>99%), and low dispersities (Đ ∼ 1.2) without employing sulfur or transition metal reagents.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Chemistry
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Polymerization, Addition polymerization, Block copolymers, Inorganic polymers, Fragmentation reactions
Journal or Publication Title: Macromolecules
Publisher: American Chemical Society (ACS)
ISSN: 1520-5835
Official Date: 23 January 2018
Dates:
DateEvent
23 January 2018Published
2 January 2018Available
2 January 2018Accepted
Volume: 51
Number: 2
Page Range: pp. 336-342
DOI: 10.1021/acs.macromol.7b01987
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741
BINAMA 705041H2020 Marie Skłodowska-Curie ActionsUNSPECIFIED

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