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Phase diagrams of low-density polyethylene–alkylbenzene systems

  • Chemical Thermodynamics and Thermochemistry
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Abstract

Complete phase diagrams for mixtures of low-density polyethylene with p- and m-xylene are plotted by optical means in developing the concept of which partially crystalline polymers are microstructured liquids. It is shown that in contrast to the ones presented in the literature, both diagrams contain the solubility boundary curve of the low-molecular weight component in the polymer, above which the polyethylene has the structure of a single-phase gel (crosslinks formed by crystallites and amorphous regions saturated with xylene). At the figurative point on the diagrams, a situation is observed in which the dissolution of all the liquid contained in the initial two-phase system in the polymer is accompanied by its simultaneous complete amorphization. The parameters of the figurative point allow us to estimate the thermodynamic affinity of different alkylbenzenes toward polyethylene.

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Authors and Affiliations

  1. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, 153045, Russia

    A. N. Ilyasova, T. N. Lebedeva & K. V. Pochivalov

  2. Topchiev Institute of Petrochemical Synthesis, Moscow, 117912, Russia

    Y. V. Kudryavtsev

  3. Ivanovo State University of Chemistry and Technology, Ivanovo, 153460, Russia

    I. V. Levashova & Yu. A. Flyagina

Authors
  1. A. N. Ilyasova
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  2. Y. V. Kudryavtsev
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  3. T. N. Lebedeva
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  4. I. V. Levashova
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  5. Yu. A. Flyagina
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  6. K. V. Pochivalov
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Corresponding author

Correspondence to A. N. Ilyasova.

Additional information

Original Russian Text © A.N. Ilyasova, Y.V. Kudryavtsev, T.N. Lebedeva, I.V. Levashova, Yu.A. Flyagina, K.V. Pochivalov, 2017, published in Zhurnal Fizicheskoi Khimii, 2017, Vol. 91, No. 3, pp. 404–409.

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Ilyasova, A.N., Kudryavtsev, Y.V., Lebedeva, T.N. et al. Phase diagrams of low-density polyethylene–alkylbenzene systems. Russ. J. Phys. Chem. 91, 425–429 (2017). https://doi.org/10.1134/S0036024417030098

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  • DOI: https://doi.org/10.1134/S0036024417030098

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