Reversible polymer cross-linking system utilizing radical crossover reaction

Yuji Higaki, Hideyuki Otsuka, Atsushi Takahara

研究成果: 会議への寄与タイプ論文

抄録

Living radical copolymerization of MMA and methacrylic ester containing TEMPO-based alkoxyamine unit has been controlled to afford the copolymers (1, 2) with alkoxyamine units at the side chain. Cross-linking reactions have been performed by heating an anisole solution of the mixture of 1 and 2 at 100°C at various concentration conditions. Cross-linking behavior remarkably depends on the concentration and the gelation occurred under high concentration condition. Reaction behavior has also evaluated by the determination of cross-linking points, and characteristic behavior of thermodynamic reaction has been observed. The reverse reaction, transformation from gel to solution, has been examined by heating the gel swelled with anisole solution of excess amount of alkoxyamine derivative 3. After heating, the sample transformed from gel state to colorless solution. Interestingly, the Mn of the resulted polymer almost corresponds to the initial Mn of the mixture of 1 and 2, indicating that the covalent cross-linking is reversible under equilibrium control.

元の言語英語
ページ数1
出版物ステータス出版済み - 12 1 2005
イベント54th SPSJ Annual Meeting 2005 - Yokohama, 日本
継続期間: 5 25 20055 27 2005

その他

その他54th SPSJ Annual Meeting 2005
日本
Yokohama
期間5/25/055/27/05

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Gels
Polymers
Heating
Gelation
Copolymerization
Esters
Copolymers
Thermodynamics
Derivatives

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Higaki, Y., Otsuka, H., & Takahara, A. (2005). Reversible polymer cross-linking system utilizing radical crossover reaction. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.

Reversible polymer cross-linking system utilizing radical crossover reaction. / Higaki, Yuji; Otsuka, Hideyuki; Takahara, Atsushi.

2005. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.

研究成果: 会議への寄与タイプ論文

Higaki, Y, Otsuka, H & Takahara, A 2005, 'Reversible polymer cross-linking system utilizing radical crossover reaction' 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本, 5/25/05 - 5/27/05, .
Higaki Y, Otsuka H, Takahara A. Reversible polymer cross-linking system utilizing radical crossover reaction. 2005. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.
Higaki, Yuji ; Otsuka, Hideyuki ; Takahara, Atsushi. / Reversible polymer cross-linking system utilizing radical crossover reaction. 論文発表場所 54th SPSJ Annual Meeting 2005, Yokohama, 日本.1 p.
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abstract = "Living radical copolymerization of MMA and methacrylic ester containing TEMPO-based alkoxyamine unit has been controlled to afford the copolymers (1, 2) with alkoxyamine units at the side chain. Cross-linking reactions have been performed by heating an anisole solution of the mixture of 1 and 2 at 100°C at various concentration conditions. Cross-linking behavior remarkably depends on the concentration and the gelation occurred under high concentration condition. Reaction behavior has also evaluated by the determination of cross-linking points, and characteristic behavior of thermodynamic reaction has been observed. The reverse reaction, transformation from gel to solution, has been examined by heating the gel swelled with anisole solution of excess amount of alkoxyamine derivative 3. After heating, the sample transformed from gel state to colorless solution. Interestingly, the Mn of the resulted polymer almost corresponds to the initial Mn of the mixture of 1 and 2, indicating that the covalent cross-linking is reversible under equilibrium control.",
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AB - Living radical copolymerization of MMA and methacrylic ester containing TEMPO-based alkoxyamine unit has been controlled to afford the copolymers (1, 2) with alkoxyamine units at the side chain. Cross-linking reactions have been performed by heating an anisole solution of the mixture of 1 and 2 at 100°C at various concentration conditions. Cross-linking behavior remarkably depends on the concentration and the gelation occurred under high concentration condition. Reaction behavior has also evaluated by the determination of cross-linking points, and characteristic behavior of thermodynamic reaction has been observed. The reverse reaction, transformation from gel to solution, has been examined by heating the gel swelled with anisole solution of excess amount of alkoxyamine derivative 3. After heating, the sample transformed from gel state to colorless solution. Interestingly, the Mn of the resulted polymer almost corresponds to the initial Mn of the mixture of 1 and 2, indicating that the covalent cross-linking is reversible under equilibrium control.

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