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Conductimetric titration of polyelectrolytes having sulfate and carboxyl groups

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Summary

Conductimetric titration of polyelectrolyte solutions was carried out to determine the contents of sulfate and carboxyl groups. In the mixtures of poly(acrylic acid) and poly(vinyl sulfate), and of alginic acid and dextran sulfate, the contents of sulfate and carboxyl groups observed by the conductimetric titration were in agreement with those derived from the concentration of the original homopolymers. This method was applied to a viscous polysaccharide from red algae, funoran, which contains both the sulfate and carboxyl groups. These results suggested that this method is applicable to either the samples consisting of the mixture of homopolymers or those of copolymers containing both ionic species.

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Authors and Affiliations

  1. Department of Material Science, Numazu College of Technology, 3600 Ooka, 410, Nurmazu, Japan

    Tooru Akahane & Sadaaki Takeuchi

  2. Department of Physics, Hamamatsu University School of Medicine, 3600 Handa-cho, 431-31, Hamamatsu, Japan

    Akira Minakata

Authors
  1. Tooru Akahane
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  2. Sadaaki Takeuchi
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  3. Akira Minakata
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Akahane, T., Takeuchi, S. & Minakata, A. Conductimetric titration of polyelectrolytes having sulfate and carboxyl groups. Polymer Bulletin 24, 437–444 (1990). https://doi.org/10.1007/BF00294098

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