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Unique dynamic crossover in supercooled x,3-dihydroxypropyl acrylate (x = 1, 2) isomers mixture

  • Szymon StarzonekEmail author
  • Aleksandra Kędzierska-Sar
  • Aleksandra Drozd-Rzoska
  • Mikołaj Szafran
  • Sylwester J. Rzoska
Open Access
Regular Article
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Abstract.

The previtreous dynamics in the glass-forming monomer, glycerol monoacrylate (GMA), was tested using the broadband dielectric spectroscopy (BDS). The measurements revealed a clear dynamic crossover at the temperature \( T_{B} = 254\) K and the time scale \( \tau (T_{B}) = 5.4\) ns for the primary (structural) relaxation time and no hallmarks for the crossover for the DC electric conductivity \(\sigma_{DC}\). This result was revealed via the derivative-based and distortions-sensitive analysis \( \mathrm{d} \ln H_{a}/\mathrm{d} (1/T)\) vs. \( 1/T\) , where \( H_{a}\) stands for the apparent activation energy. Subsequent tests of the fractional Debye-Stokes-Einsten relation \( \sigma_{DC} (\tau_{\alpha})^{S} = \mbox{const}\) showed that the crossover is associated with \( S = 1\) \( (\mathrm{for}\ T > T_{B}) \rightarrow S = 0.84\) (for \( T < T_{B}\). The crossover coexists with the emergence of the secondary beta relaxation, which smoothly develops deeply into the solid amorphous phase below the glass temperature \( T_{g}\).

Graphical abstract

Keywords

Soft Matter: Polymers and Polyelectrolytes 

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Copyright information

© The Author(s) 2018

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://doi.org/creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Authors and Affiliations

  • Szymon Starzonek
    • 1
    • 3
    Email author
  • Aleksandra Kędzierska-Sar
    • 1
    • 2
  • Aleksandra Drozd-Rzoska
    • 1
    • 3
  • Mikołaj Szafran
    • 2
  • Sylwester J. Rzoska
    • 1
    • 3
  1. 1.Institute of High Pressure PhysicsPolish Academy of SciencesWarsawPoland
  2. 2.Department of Chemical TechnologyWarsaw University of TechnologyWarsawPoland
  3. 3.Warsaw Dielectrics GroupWarsawPoland

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