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A new correlation between molecular parameters and physical properties of chlorobutyl rubbers grafted with polystyrene branches

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Summary

A series of chlorobutyl rubbers grafted with polystyrene branches have been prepared and backbone length, branch density and segment lengths between branches were calculated from the overall graft composition, number average molecular weight, and branch molecular weight. Analysis of the deformation process revealed unexpected correlations between the molecular parameters and tensile properties of the graft: the tensile strength is directly, and the elongation at break inversely proportional to the ratio of branch molecular weight to the molecular weight of segments between the branches. Further, the tensile strength and elongation at break are proportional to the molecular weight of the backbone. A general correlation was found between the backbone molecular weight and the specific breaking energy.

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References

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Author notes

  1. Bela Pukanszky (Visiting Scientist) & Tibor Kelen (Visiting Scientist)

    Present address: Central Research Institute for Chemistry, Hungarian Academy of Sciences, P.O. Box 17, 1525, Budapest, Hungary

Authors and Affiliations

  1. Institute of Polymer Science, University of Akron, 44325, Akron, Ohio, USA

    Bela Pukanszky (Visiting Scientist), Joseph P. Kennedy & Tibor Kelen (Visiting Scientist)

Authors
  1. Bela Pukanszky
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  2. Joseph P. Kennedy
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  3. Tibor Kelen
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Pukanszky, B., Kennedy, J.P. & Kelen, T. A new correlation between molecular parameters and physical properties of chlorobutyl rubbers grafted with polystyrene branches. Polymer Bulletin 4, 437–443 (1981). https://doi.org/10.1007/BF00255698

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  • DOI: https://doi.org/10.1007/BF00255698

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