期刊
REACTIVE & FUNCTIONAL POLYMERS
卷 179, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.reactfunctpolym.2022.105377
关键词
Polymeric diazonium salt; Block ionomer; Self-assembly; Post-modification; Azo coupling reaction
资金
- National Key Research and Development Program of China [2017YFA0701303]
- National Natural Science Foundation of China [51873097]
In this study, an amphiphilic block copolymer with PS and PS-based polymeric diazonium salts was synthesized. The self-assembled nano-sized micelles in selective solvents were formed, with the diazonium groups playing a critical role in colloidal stability and post-modification.
In this work, an amphiphilic block copolymer (PS-b-PSN2+) composed of PS and PS-based polymeric diazonium salts was synthesized. The diblock precursor polymer (PS-b-PSNHBoc) consisting of PS block and Boc-protected poly(p-vinylaniline) block was prepared by RAFT polymerization. After the deprotection and diazotization, an amphiphilic block copolymer with diazonium salt pendant groups was obtained. The block ionomer would then self-assemble into nano-sized micelles in selective solvents, which was verified by TEM and dynamic light scattering measurements. The diazonium groups in the corona of the polymeric micelles could not only serve as the major role for colloidal stability but also allow an efficient post-modification. Azobenzene moieties could be easily introduced into the self-assembled micelles by azo coupling reaction between the polymeric diazonium salts and N,N-dimethylaniline.
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