Light Scattering Studies on the Second CMC of the Aqueous Solution of Dodecyl Pyridinium Chloride and Tetradecyl Pyridinium Chloride

光散亂에 依한 Dodecyl Pyridinium Chloride 및 Tetradecyl Pyridinium Chloride 水溶液의 第二 CMC에 關한 硏究

  • Moo Ill Chung (Department of Chemistry, College of Education, Seoul National University) ;
  • In Ja Tak (Department of Chemistry, College of Education, Seoul National University) ;
  • Kun Moo Lee (Department of Chemistry, College of Education, Seoul National University)
  • 정무일 (서울大學敎 師範大學 化學科) ;
  • 탁인자 (서울大學敎 師範大學 化學科) ;
  • 이근무 (서울大學敎 師範大學 化學科)
  • Published : 1975.12.30

Abstract

The light scattering studies of the aqueous solution of dodecyl pyridinium chloride (DPC) and tetradecyl pyridinium chloride (TPC) over the concentration range of 0~70 mM revealed that there exists a so-called 2nd critical micelle concentration (cmc) at about 43 mM and 8 mM respectively in addition to their 1st cmc at 17 mM and 3.5 mM. The 2nd cmc was greatly influenced by additives KCl, which lowered the 2nd cmc. The micelle molecular weight of DPC and TPC solutions at 1st cmc were 20800 and 15600 and the degree of ionization of their micelles at 1st cmc were 0.092 and 0.226 respectively.

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References

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