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A User-friendly Living Cationic Polymerization: Degenerative Chain-transfer Polymerization of Vinyl Ethers by Simply Using Mixtures of Weak and Superstrong Protonic Acids
http://hdl.handle.net/2237/00030869
95eee894-02b7-4fbb-bc01-3bc012d96861
名前 / ファイル | ライセンス | アクション | |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2019-11-13 | |||||
タイトル | ||||||
タイトル | A User-friendly Living Cationic Polymerization: Degenerative Chain-transfer Polymerization of Vinyl Ethers by Simply Using Mixtures of Weak and Superstrong Protonic Acids | |||||
著者 |
Uchiyama, Mineto
× Uchiyama, Mineto× Sakaguchi, Masataka× Satoh, Kotaro× Kamigaito, Masami |
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権利 | ||||||
権利情報 | “This is a post-peer-review, pre-copyedit version of an article published in [Chinese Journal of Polymer Science]. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10118-019-2233-0”. | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Living cationic polymerization | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Degenerative chain transfer | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | RAFT polymerization | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Metal free | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Vinyl ether | |||||
抄録 | ||||||
内容記述 | Mixtures of a weak protonic acid and a trace amount of superstrong protonic acid were used for the simple control of the cationic polymerization of vinyl ethers via a degenerative chain-transfer mechanism, in which the former acid works as a precursor of the chain transfer agent (CTA) or the dormant species and the latter works as a source of the cationic propagating species. The addition of mixtures of phosphoric acid dibutyl ester ((n-BuO)2PO2H) or 1-octanethiol (n-C8H17SH) and a trace amount of trifluoromethanesulfonic acid (TfOH) to a solution of isobutyl vinyl ether (IBVE) at −78 °C resulted in polymers with controlled molecular weights, which were basically determined by the feed ratio of IBVE to the weak protonic acid, and narrow molecular weight distributions (Mw/Mn ≈ 1.1). These results were almost the same as those obtained using their prepared adducts of IBVE as CTAs in the presence of a trace amount of TfOH under similar conditions. Methanesulfonic acid (CH3SO3H), whose adduct of IBVE has not been isolated due to instability, was similarly used in conjunction with trace TfOH to result in controlled molecular weights but slightly broader MWDs (Mw/Mn = 1.2–1.8). These results indicate that the sulfoxonium ion is also an effective intermediate in the cationic DT polymerization in addition to the phosphonium and sulfonium intermediates derived from (n-BuO)2PO2H and n-C8H17SH, respectively. The simple living cationic polymerization was thus achieved by using a combination of a weak protonic acid and a trace amount of TfOH, which are both easily available, low cost, free from metal, and easy to handle, without need for preparation of the initiator. | |||||
内容記述タイプ | Abstract | |||||
内容記述 | ||||||
内容記述 | ファイル公開:2020/09/01 | |||||
内容記述タイプ | Other | |||||
出版者 | ||||||
出版者 | Springer | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
DOI | ||||||
関連識別子 | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1007/s10118-019-2233-0 | |||||
ISSN(print) | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0256-7679 | |||||
書誌情報 |
Chinese Journal of Polymer Science 巻 37, 号 9, p. 851-857, 発行日 2019-09 |
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著者版フラグ | ||||||
値 | author |