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Correction of the number average molecular weight of hydroxylated liquid polybutadiene as determined by vapor pressure osmometry

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Summary

Number average molecular weight (\(\bar Mn\)) determinations of oligomers by vapor pressure osmometry (VPO) requires highly purified samples. As ultraviolet spectroscopy is a convenient technique for accurate evaluation of small concentrations, it was used to determine the concentration of 2,6-di-t-butyl-4-methylphenol antioxidant in commercial hydroxylated liquid polybutadiene in the\(\bar Mn\) = 28000–3000 range. The data were used to correct\(\bar Mn\) values measured by VPO, allowing the determination of correct molecular weights without previous polymer purification.

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Authors and Affiliations

  1. Instituto de Química, Universidade Federal do Rio de Janeiro, I. Fundão, 21910, Rio de Janeiro, Brazil

    L. Akcelrud

  2. Polymer Division Petrobras Research Center, Rio de Janeiro, Brazil

    A. G. Tinoco

Authors
  1. L. Akcelrud
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  2. A. G. Tinoco
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Akcelrud, L., Tinoco, A.G. Correction of the number average molecular weight of hydroxylated liquid polybutadiene as determined by vapor pressure osmometry. Polymer Bulletin 26, 333–339 (1991). https://doi.org/10.1007/BF00587978

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  • DOI: https://doi.org/10.1007/BF00587978

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