A Novel Thermal Latent Cationic Initiator: S-Alkylsulfonium Salts Obtained by Desulfurization of Light Oil

Autor:	Isao Komasawa, Kenya Tachibana, Yasuhiro Shiraishi, Takayuki Hirai
Rok vydání:	2002
Předmět:	Light crude oil Sulfonium General Chemical Engineering Cationic polymerization Epoxide Ether General Chemistry Ring-opening polymerization Industrial and Manufacturing Engineering Flue-gas desulfurization chemistry.chemical_compound chemistry Polymerization Polymer chemistry Organic chemistry
Zdroj:	Industrial & Engineering Chemistry Research. 41:5554-5557
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie0204437
Popis:	S-Methylsulfonium salts, obtained by a desulfurization process for light oil based on the methylation of sulfur-containing compounds using CH3I and AgBF4 and subsequent precipitation, were used as a thermal latent initiator for cationic ring-opening polymerization of epoxide (glycidyl phenyl ether, GPE). The sulfonium salts, obtained from the light oil, showed good thermal latency and demonstrated significantly high initiation activity for the polymerization of GPE. The activity of the salts was rather higher than that obtained using the salts of pure dibenzothiophenes (DBTs) and benzothiophenes (BTs) as the model sulfonium salts. The salts, obtained from light oil, are derived from highly alkyl-substituted DBTs and BTs in light oil, of low nucleophilicity (low electron density on the sulfur atom), and therefore are unstable against thermal stimulation, thus giving the high initiation activity for the polymerization.
Databáze:	OpenAIRE
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