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

doi:10.1002/asia.200800081

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 journal › Article › peer-review

45 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 (M_w/M_n=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 language	English
Pages (from-to)	1558-1567
Number of pages	10
Journal	Chemistry - An Asian Journal
Volume	3
Issue number	8-9
DOIs	https://doi.org/10.1002/asia.200800081
Publication status	Published - Sept 1 2008
Externally published	Yes

ASJC Scopus subject areas

Biochemistry
Organic Chemistry

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title = "Microflow system controlled carbocationic polymerization of vinyl ethers",

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.",

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T1 - Microflow system controlled carbocationic polymerization of vinyl ethers

AU - Nagaki, Aiichiro

AU - Iwasaki, Takeshi

AU - Kawamura, Kohsuke

AU - Yamada, Daisuke

AU - Suga, Seiji

AU - Ando, Tuyoshi

AU - Sawamoto, Mitsuo

AU - Yoshida, Jun Ichi

PY - 2008/9/1

Y1 - 2008/9/1

N2 - 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.

AB - 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.

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Microflow system controlled carbocationic polymerization of vinyl ethers

Abstract

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