Microflow system controlled carbocationic polymerization of vinyl ethers

Aiichiro Nagaki, Takeshi Iwasaki, Kohsuke Kawamura, Daisuke Yamada, Seiji Suga, Tuyoshi Ando, Mitsuo Sawamoto, Jun Ichi Yoshida

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A "cation pool" of an Nacyliminium ion was found to serve as an effective initiator of cationic polymerization of vinyl ethers in a microflow system consisting of two micromixers (IMM micromixer) and two microtube reactors. The cationic polymerization of n-butyl vinyl ether in CH 2Cl2 at -78°C led to very narrow molecular weight distribution (Mw/Mn=1.14). The molecular weight (M n) increased linearly with an increase in monomer/initiator ratio. The carbocationic polymer end was effectively trapped by allyltrimethylsilane. Additionally, the synthesis of block polymers was accomplished by the present microflow system controlled method. The polymerization was also conducted using commercially available trifluoromethanesulfonic acid (TfOH) as an initiator. A high level of molecular weight control was attained even at -25°C. The TfOH-initiated polymerization could be conducted using a microflow system based on T-shaped micromixers, which serves as a practical tool for microflow system controlled carbocationic polymerization.

Original languageEnglish
Pages (from-to)1558-1567
Number of pages10
JournalChemistry - An Asian Journal
Volume3
Issue number8-9
DOIs
Publication statusPublished - Sep 1 2008
Externally publishedYes

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Polymerization
Cationic polymerization
Molecular weight
Weight control
Molecular Weight
Molecular weight distribution
Polymers
Block copolymers
Cations
Monomers
Ions
vinyl ether
trifluoromethanesulfonic acid
n-butyl vinyl ether
allyltrimethylsilane

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Nagaki, A., Iwasaki, T., Kawamura, K., Yamada, D., Suga, S., Ando, T., ... Yoshida, J. I. (2008). Microflow system controlled carbocationic polymerization of vinyl ethers. Chemistry - An Asian Journal, 3(8-9), 1558-1567. https://doi.org/10.1002/asia.200800081

Microflow system controlled carbocationic polymerization of vinyl ethers. / Nagaki, Aiichiro; Iwasaki, Takeshi; Kawamura, Kohsuke; Yamada, Daisuke; Suga, Seiji; Ando, Tuyoshi; Sawamoto, Mitsuo; Yoshida, Jun Ichi.

In: Chemistry - An Asian Journal, Vol. 3, No. 8-9, 01.09.2008, p. 1558-1567.

Research output: Contribution to journalArticle

Nagaki, A, Iwasaki, T, Kawamura, K, Yamada, D, Suga, S, Ando, T, Sawamoto, M & Yoshida, JI 2008, 'Microflow system controlled carbocationic polymerization of vinyl ethers', Chemistry - An Asian Journal, vol. 3, no. 8-9, pp. 1558-1567. https://doi.org/10.1002/asia.200800081
Nagaki, Aiichiro ; Iwasaki, Takeshi ; Kawamura, Kohsuke ; Yamada, Daisuke ; Suga, Seiji ; Ando, Tuyoshi ; Sawamoto, Mitsuo ; Yoshida, Jun Ichi. / Microflow system controlled carbocationic polymerization of vinyl ethers. In: Chemistry - An Asian Journal. 2008 ; Vol. 3, No. 8-9. pp. 1558-1567.
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