2019年9月10日
pMAIRS Analysis on Chain-End Functionalization of Densely Grafted, Concentrated Polymer Brushes
Macromolecules
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- 巻
- 52
- 号
- 17
- 開始ページ
- 6673
- 終了ページ
- 6682
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.macromol.9b01149
- 出版者・発行元
- American Chemical Society (ACS)
The degree of chain-end functionality in a densely grafted, concentrated polymer brush is a critical parameter. In this study, p-polarized multiple-angle incidence resolution spectrometry (pMAIRS) technique was applied to monitor the emergence and disappearance of substituted azide (N-3) at the chain ends of polymer brushes, allowing the accurate determination of the azide density and the click reaction efficacy. The peak separation of the N-3 absorption bands in the pMAIRS spectra showed that azide substitution occurred not only at the brush ends but also at the underlying initiators that did not react during surface-initiated atom transfer radical polymerization. Hence, the density of each type of azide group and the efficiencies of the azidation and click reaction could successfully be estimated. Furthermore, a chain-end-selective click reaction was demonstrated for the azide- functionalized polymethacrylate-type polymer brushes based on size exclusion effects and polarity differences. Thus, the pMAIRS method provides important quantitative information that can expand the applications of chain-end functionalized polymer brushes.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.macromol.9b01149
- ISSN : 0024-9297
- eISSN : 1520-5835
- Web of Science ID : WOS:000485832000032