Cited by 172Advanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and propertiesPolymer Synthesis and Characterization

Reversible addition fragmentation chain transfer (raft) and hetero-diels–alder chemistry as a convenient conjugation tool for access to complex macromolecular designs

Inglis, Andrew J., Sinnwell, Sebastian, Davis, Thomas P., Barner-Kowollik, Christopher, Stenzel, Martina H.·2008·Macromolecules

Abstract

The combination of RAFT chemistry and the hetero-Diels−Alder (HDA) cycloaddition was successfully utilized in the synthesis of poly(styrene) (PS) star polymers with up to 4 arms. This variant of the “coupling onto” method of star polymer synthesis was investigated for two different RAFT end groups (diethoxyphosphoryldithioformate and pyridin-2-yldithioformate) and coupling agents bearing 2, 3, or 4 diene functional groups. When a diethoxyphosphoryldithioformate terminated polymer was reacted with the 2-, 3-, and 4-fold functionalized coupling agents, the yields of 2-arm star, 3-arm star, and 4-arm star polymers were 81%, 77%, and 65%, respectively, and when a pyridin-2-yldithioformate terminated polymer was reacted with the same coupling agents, the yields of 2-arm star, 3-arm star and 4-arm star polymers were 91%, 86% and 82% respectively. The HDA coupling reaction was monitored via UV/vis spectroscopy from the perspective of the RAFT end group as well as by 1 H NMR spectroscopy from the perspective of the diene functionality. The results of these investigations indicated that the phosphoryldiethoxydithioformate terminated polymer achieves 92% conversion within a 24 h time frame and the pyridin-2-yldithioformate terminated polymer achieves 96% conversion in 10 h. The 4-arm star polymers were also subjected to high-temperature environments, and GPC measurements indicated that complete cleavage of all 4 arms from the core was achieved in 24 h at 160 °C.

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Crossref · 10.1021/ma8002328

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  • Barner-Kowollik and Stenzel et al. first synthesized a series of star polymers by combination of RAFT chemistry and hetero Diels-Alder reaction, in which the reaction occurs between thiocarbonyl group and a diene in a [4 + 2] cycloaddition process.

    “Barner-Kowollik and Stenzel et al. first synthesized a series of star polymers by a combination of RAFT chemistry and hetero Diels-Alder reaction [60], in which the reaction occurs between thiocarbonyl group and a diene in a [4 + 2] cycloaddition process (Scheme 6).”

    From Block Copolymers: Synthesis, Self-Assembly, and Applications (2017) · cites this paper as [60]

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Authors
Inglis, A. J., Sinnwell, S., Davis, T. P., Barner-Kowollik, C., & Stenzel, M. H.
Affiliations
  • UNSW Sydney (AU)
  • Centre for Advanced Macromolecular Design (CAMD), School of Chemical Sciences and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
Corresponding author
Stenzel, Martina H.
Venue
Macromolecules
Published
2008-05-20
Volume
41
Issue
12
Pages
4120-4126
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W1982483962
Cited by
172
References
41
Citations by year
2024: 3 · 2023: 2 · 2022: 6 · 2021: 10 · 2020: 2 · 2019: 4 · 2018: 5 · 2017: 6 · 2016: 6 · 2015: 9 · 2014: 8 · 2013: 9 · 2012: 16
FWCI
14.25
Type
journal article
Language
en
Open access
closed
Locations
  • Macromolecules (publishedVersion)
  • QUT ePrints (Queensland University of Technology) (submittedVersion)
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer Synthesis and Characterization
Keywords
RAFT polymerization, hetero-Diels-Alder reaction, star polymers, polystyrene

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