Photo‐responsive block copolymer containing azobenzene group: Synthesis by reversible addition‐fragmentation chain transfer polymerization and characterization

ABSTRACT The design and synthesis of a new azobenzene‐based methacrylate monomer (Azo‐IEM) was demonstrated, and its polymerization behavior during reversible addition‐fragmentation chain transfer (RAFT) polymerization was investigated. Well‐defined homopolymer and amphiphilic block copolymer contai...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-09, Vol.136 (33), p.n/a
Main Authors: Yang, Runmiao, Liu, Yuhai, Chen, Jianxiang, Zhu, Wen, Dong, Guanxiu
Format: Article
Language:English
Subjects:
Addition polymerization
Azo compounds
azobenzene
block copolymer
Block copolymers
Chain transfer
Chains (polymeric)
Chemical synthesis
Chloroform
Fragmentation
Isomerization
Materials science
Morphology
Nanoparticles
NMR
Nuclear magnetic resonance
photo‐responsive
Polymerization
Polymers
reversible addition‐fragmentation chain transfer polymerizations
Solvents
Ultraviolet radiation
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Summary:ABSTRACT The design and synthesis of a new azobenzene‐based methacrylate monomer (Azo‐IEM) was demonstrated, and its polymerization behavior during reversible addition‐fragmentation chain transfer (RAFT) polymerization was investigated. Well‐defined homopolymer and amphiphilic block copolymer containing Azo‐IEM monomeric units were successfully prepared as evidenced by NMR and GPC analysis. Moreover, the photo‐triggered reversible isomerization of polymer products in selected solvents was investigated. Finally, TEM analysis showed that there were significant differences in the nanoparticle morphologies when the block copolymer samples were irradiated with different wavelengths of light (i.e., UV and visible). The size and shapes of the p(HEMA‐b‐Azo‐IEM) polymer capable of transitions upon changes in Vis/UV light exposure which prepared from MeOH/CHCl3 mixture solvent. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47870. The size and shapes of the p(HEMA‐b‐Azo‐IEM) polymer capable of transitions upon changes in Vis/UV light exposure which prepared from MeOH/CHCl3 mixture solvent.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47870