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- W2481407395 abstract "Cationic polymerization of diethyleneglycol divinyl ether and butanediol divinyl ether in the presence of onium salts was induced by γ-irradiation. The mechanism for the initiation process involves the reduction of onium salts either by organic free radicals or solvated electrons depending on the reduction potentials of the onium salts. The reduction potentials of sulfonium salts was determined by polarography at the dropping mercury electrode. Only solvated electrons were capable of reducing the salts with reduction potentials lower than approximately -100 kJ/mol. The redox process liberates the non-nucleophilic anion from the reduced onium salt and leads to the formation of a Brönsted acid or a stabilized carbenium ion. These species are the true initiators of cationic polymerization in this system. The γ-induced decomposition of onium salts in 2-ethoxyethyl ether was also followed by measuring the formation of protons. An ESR study of the structure of the radicals formed in the γ-radiolysis of butanediol divinyl ether showed that only a-ether radicals were formed." @default.
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- W2481407395 date "1990-12-28" @default.
- W2481407395 modified "2023-10-11" @default.
- W2481407395 title "High-Energy-Radiation-Induced Cationic Polymerization of Vinyl Ethers in the Presence of Onium Salt Initiators" @default.
- W2481407395 doi "https://doi.org/10.1021/bk-1990-0417.ch032" @default.
- W2481407395 hasPublicationYear "1990" @default.
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