2,4.

Toyoki Kunitake, Takeharu Ochiai, Osamu Ohara

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

In the reported program, spiro left bracket 2,4 right bracket hepta-4. 6-diene, a derivative of cyclopentadiene, was polymerized at minus 76 degree C with various triphenylmethyl salts as initiator. The polymer consists only of the 1,2- and 1,4-addition structures, and their contents can be determined by the relative area of the olefin proton peaks. The polymer structure changed characteristically with the polymerization conditions. The content of 1,4-structure decreased with increasing polarity of the medium from 45-70 in toluene to 25-30% in 7:3 CH//2Cl//2-CH//3CN. In 1:1 CH//2Cl//2-toluene, the 1,4-structure content decreased tom 70% to 40% with increasing radii of counteranions. These results were interpreted according to the model of the cationic propagation proposed earlier, as arising from the different tightness of the propagating ion pair.

元の言語英語
ページ(範囲)2581-2590
ページ数10
ジャーナルJ Polym Sci Polym Chem Ed
13
発行部数11
出版物ステータス出版済み - 1 1 1975
外部発表Yes

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Toluene
Polymers
Olefins
Protons
Polymerization
Salts
Derivatives
Ions

All Science Journal Classification (ASJC) codes

  • Engineering(all)

これを引用

Kunitake, T., Ochiai, T., & Ohara, O. (1975). 2,4. J Polym Sci Polym Chem Ed, 13(11), 2581-2590.

2,4. / Kunitake, Toyoki; Ochiai, Takeharu; Ohara, Osamu.

:: J Polym Sci Polym Chem Ed, 巻 13, 番号 11, 01.01.1975, p. 2581-2590.

研究成果: ジャーナルへの寄稿記事

Kunitake, T, Ochiai, T & Ohara, O 1975, '2,4.', J Polym Sci Polym Chem Ed, 巻. 13, 番号 11, pp. 2581-2590.
Kunitake T, Ochiai T, Ohara O. 2,4. J Polym Sci Polym Chem Ed. 1975 1 1;13(11):2581-2590.
Kunitake, Toyoki ; Ochiai, Takeharu ; Ohara, Osamu. / 2,4. :: J Polym Sci Polym Chem Ed. 1975 ; 巻 13, 番号 11. pp. 2581-2590.
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AB - In the reported program, spiro left bracket 2,4 right bracket hepta-4. 6-diene, a derivative of cyclopentadiene, was polymerized at minus 76 degree C with various triphenylmethyl salts as initiator. The polymer consists only of the 1,2- and 1,4-addition structures, and their contents can be determined by the relative area of the olefin proton peaks. The polymer structure changed characteristically with the polymerization conditions. The content of 1,4-structure decreased with increasing polarity of the medium from 45-70 in toluene to 25-30% in 7:3 CH//2Cl//2-CH//3CN. In 1:1 CH//2Cl//2-toluene, the 1,4-structure content decreased tom 70% to 40% with increasing radii of counteranions. These results were interpreted according to the model of the cationic propagation proposed earlier, as arising from the different tightness of the propagating ion pair.

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