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Scaling law for the radius of gyration of poly[bis(2-naphthoxyphosphazene)] (PBNP)

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Abstract

A numerical procedure that allows for the evaluation of the scaling law between radius of gyration and molecular weight,<s2> 1/2i =Q M qi , of ideally monodisperse fractions of any polymer is proposed. The method is similar to that previously used to determine viscometric constants and chromatographic calibration functions and is based on the combination of experimental results obtained by Static Light Scattering and Size Exclusion Chromatography on polydisperse samples. The method is used to study poly[bis(2-naphthoxyphosphazene)] in THF solution at 25°C for which the relationship<s2> 1/2i =0.557 M 0.29i is obtained. The comparison between the dimensions computed with this equation and those obtained by viscometric measurements, performed under the same experimental conditions, suggest the formation of intermolecular aggregates in the solutions of this polymer.

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Authors and Affiliations

  1. Departamento de Química Física, Universidad de Alcalá de Henares, Alcalá de Henares, 28871, Madrid, Spain

    Maria P. Tarazona, Julio Bravo & Enrique Saiz

Authors
  1. Maria P. Tarazona
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  2. Julio Bravo
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  3. Enrique Saiz
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Tarazona, M.P., Bravo, J. & Saiz, E. Scaling law for the radius of gyration of poly[bis(2-naphthoxyphosphazene)] (PBNP). Polymer Bulletin 29, 469–475 (1992). https://doi.org/10.1007/BF00944846

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  • DOI: https://doi.org/10.1007/BF00944846

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