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On the stiffness of the welan chain

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Summary

Welan, purified as its sodium salt from unpasteurised culture broth, was analyzed by dilute aqueous viscometry. Measurements in water and at low ionic strength were carried out to evaluate the change effect on intrinsic viscosity. The value of intrinsic viscosity at low ionic strength, determined by the isoionic dilution method, is close to that obtained at higher salt concentrations. A comparison is made among the stiffness parameters determined by different treatment of experimental data. The results agree with previous reports on the weak polyelectrolyte character and high stiffness of the welan chain.

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Authors and Affiliations

  1. Instituto de Química de São Carlos, Universidade de São Paulo, Caixa Postal 780, SP-13560-970, São Carlos, Brasil

    S. P. Campana Filho, A. Regiani & E. Frollini

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  1. S. P. Campana Filho
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  2. A. Regiani
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  3. E. Frollini
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Campana Filho, S.P., Regiani, A. & Frollini, E. On the stiffness of the welan chain. Polymer Bulletin 38, 81–85 (1997). https://doi.org/10.1007/s002890050022

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  • DOI: https://doi.org/10.1007/s002890050022

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