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Topologically Reversible Transformation of Tricyclic Polymer into Polyring Using Disulfide/Thiol Redox Chemistry
- Source :
- Macromolecules. 51:5313-5322
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- A polyring capable of reversible growth and dissociation is synthesized from a tricyclic polystyrene (PS) prepared by combining atom transfer radical polymerization of a 4-arm star-shaped PS and azide–alkyne click reactions. In the preparation of the tricyclic PS, a coupling agent containing a disulfide linkage is used in the click cyclization reaction. The reduction of the disulfide linkage in the tricyclic PS results in an 8-shaped PS with thiol groups which on oxidation leads to a high molecular weight polyring. The topology transformation between the polymers occurs via reversible redox reaction of disulfide/thiol. The high molecular weight of the polyring is realized due to the formation of flexible S–S linkage between the 8-shaped PSs. Their structures are confirmed by FT-IR, 1H NMR, SEC, and MALDI-TOF MS analyses. In addition, molecular weight control of the polyring according to polymer concentration has been confirmed through SEC analysis.
- Subjects :
- chemistry.chemical_classification
Polymers and Plastics
Atom-transfer radical-polymerization
Disulfide Linkage
Organic Chemistry
02 engineering and technology
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Redox
Dissociation (chemistry)
0104 chemical sciences
Inorganic Chemistry
chemistry.chemical_compound
chemistry
Polymer chemistry
Materials Chemistry
Thiol
Proton NMR
Polystyrene
0210 nano-technology
Subjects
Details
- ISSN :
- 15205835 and 00249297
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- Macromolecules
- Accession number :
- edsair.doi...........92604fb8dc1f4662b2c9b9644984e753