期刊
POLYMER CHEMISTRY
卷 13, 期 27, 页码 4018-4027出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2py00606e
关键词
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资金
- National Natural Science Foundation of China [22171055, 21971047]
- Guangdong Natural Science Foundation for Distinguished Young Scholar [2022B1515020078]
- Science and Technology Program of Guangzhou [202102020631]
- Guangdong Special Support Program [2017TX04N371]
Photoinitiated polymerization-induced self-assembly (photo-PISA) is a scalable method for preparing block copolymer nanoparticles at room temperature. In this study, alpha,omega-functionalized polymers with a photoinitiator end group and a RAFT end group were synthesized and used as macromolecular photoinitiators/chain transfer agents in aqueous photo-PISA. The study found that near quantitative monomer conversion could be achieved within a short time, and moderate RAFT controllability was obtained. The effects of different factors on the morphologies of block copolymer nanoparticles were also investigated.
Photoinitiated polymerization-induced self-assembly (photo-PISA) is an emerging method for scalable preparation of block copolymer nanoparticles at room temperature. However, the use of small molecular photoinitiators in photo-PISA is detrimental to further applications of block copolymer nanoparticles. Herein, alpha,omega-functionalized polymers with a photoinitiator end group and a RAFT end group were synthesized and employed as macromolecular photoinitiators/chain transfer agents in aqueous photo-PISA at room temperature. A kinetic study suggested that photo-PISA exhibited a high rate of polymerization with near quantitative monomer conversion being achieved within 30 min. Gel permeation chromatography (GPC) analysis indicated that moderate RAFT controllability was achieved during photo-PISA. The effects of the degree of polymerization (DP) of the core-forming block, the monomer concentration, and the DP of the alpha,omega-macromolecular photoinitiator/chain transfer agent on the morphologies of block copolymer nanoparticles were investigated. Finally, a direct comparison between thermally initiated PISA and photo-PISA using the alpha,omega-macromolecular photoinitiator/chain transfer agent was performed. This study not only expands the scope of photo-PISA, but also provides mechanistic insights into the process of polymerization-induced self-assembly.
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