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Failure of time-temperature superposition in dilute miscible polymer blends

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Abstract

The dynamic viscosity for miscible blends of 1,4-polyisoprene and poly(vinyl ethylene) (PVE) at the extremes of composition (1% tracer in 99% matrix) has been measured as a function of temperature. Time-temperature superposition failure is observed in these tracer blends. This observation indicates that intramolecular contributions are crucial in defining the local environment experienced by a polymer segment, as anticipated by self-concentration models. The temperature dependence of the dynamics of the PVE tracer has been extracted, and compared with the model of Lodge and McLeish. The self-concentration effect was found to be even stronger than predicted.

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Acknowledgements

This work was supported by the National Science Foundation, through Award No. DMR-9901087. We would like to thank N. Lynd and Z. Zhou for providing the PI-5 and PVE-5 samples, and M. D. Ediger for helpful discussions.

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Authors and Affiliations

  1. Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA

    Jeffrey C. Haley & Timothy P. Lodge

  2. Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA

    Timothy P. Lodge

Authors
  1. Jeffrey C. Haley
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  2. Timothy P. Lodge
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Correspondence to Timothy P. Lodge.

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Haley, J.C., Lodge, T.P. Failure of time-temperature superposition in dilute miscible polymer blends. Colloid Polym Sci 282, 793–801 (2004). https://doi.org/10.1007/s00396-004-1092-5

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  • DOI: https://doi.org/10.1007/s00396-004-1092-5

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