EVALUATION OF THE EFFECTIVE HLB OF SURFACE-ACTIVE CROWN COMPOUNDS.

Ping Lin Kuo, Isao Ikeda, Mitsuo Okahara

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5 Citations (Scopus)

Abstract

The hydrophilicity of surface-active crown compounds and their change upon the addition of electrolytes were investigated by measuring the phase-inversion temperature (PIT), the phenol index, and the cloud point. Sodium chloride and potassium chloride were observed to raise the hydrophilicity of 15-crowns and 18-crowns respectively, in contrast with their lowering effect on the hydrophilicity of usual poly(oxyethylene)-type nonionics. The effective HLBs of dodecyl crown ethers, estimated from both the PIT and the phenol index, were compared with those of poly(oxyethylene) dodecyl ethers, and the hydrophilicity of the crown rings were discussed in conjunction with that of the poly(oxyethylene) chain.

Original languageEnglish
Pages (from-to)3356-3359
Number of pages4
JournalBulletin of the Chemical Society of Japan
Volume55
Issue number11
DOIs
Publication statusPublished - 1982

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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