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Cationic Ring-Opening Polymerization of an Exomethylene Group Carrying Cyclic Carbonate. Pseudo-Living Polymerization of 5-Methylene-1,3-dioxan-2-one by the Assistance of the Exomethylene Group

โœ Scribed by Sanda, Fumio; Fueki, Takafumi; Endo, Takeshi

Book ID
127242819
Publisher
American Chemical Society
Year
1999
Tongue
English
Weight
129 KB
Volume
32
Category
Article
ISSN
0024-9297

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Ring opening during the cationic polymer
Ring opening during the cationic polymerization of 2-methylene-1,3-dioxepane: Cyclic ketene acetal initiation with sulfuric acid supported on carbon
โœ Peter C. Zhu; Zhihong Wu; Charles U. Pittman Jr. ๐Ÿ“‚ Article ๐Ÿ“… 1997 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 740 KB

The stable cyclic ketene acetal, 2-metbylene-1,3-dioxepane, 7, has been polymerized cat ionically in pentane, CHzClj and THF at 25ยฐC to form a polymer which is composed of both ring-opened (40-50% ) and ring-retained (50-60%) structures. Init iatiorr was catalyzed by using H2S0, -supported on activa