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Low-density polyethylene in mixtures of hexane and benzene derivates

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Abstract

Preferential sorption, equilibrium swelling degree, and volume of the swollen membrane in systems low-density polyethylene + hexane + aromatic compound (benzene, methylbenzene, or ethylbenzene) were studied using gravimetric and dilatometric methods at the temperature of 25 °C. Aromatic compounds are preferentially sorbed in low-density polyethylene compared to hexane. Experimental volume changes of the membrane were found to be noticeably different from those calculated on the basis of mass sorption data under the assumption of additivity. This difference points to the existence of the interactions between the polymer and the surrounding liquid mixture. The volume swelling degree curves are close to each other in the whole concentration range of the binary liquid mixture (hexane + aromatics) suggesting that the attractive forces between the polymer chains are the deciding factor limiting the volume expansion of the membrane in all three systems to the same extent.

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Authors and Affiliations

  1. Department of Physical Chemistry, Institute of Chemical Technology, Technická 5, 166 28, Prague 6, Czech Republic

    Alena Randová, Lidmila Bartovská & Štěpán Hovorka

  2. Department of Physics and Measurements, Institute of Chemical Technology, Technická 5, 166 28, Prague 6, Czech Republic

    Tomáš Bartovský

  3. Institute of Chemical Process Fundamentals, Rozvojová 135, 165 02, Prague 6, Czech Republic

    Pavel Izák & Magda Poloncarzová

Authors
  1. Alena Randová
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  2. Lidmila Bartovská
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  3. Štěpán Hovorka
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  4. Pavel Izák
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  5. Magda Poloncarzová
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  6. Tomáš Bartovský
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Correspondence to Alena Randová.

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Randová, A., Bartovská, L., Hovorka, Š. et al. Low-density polyethylene in mixtures of hexane and benzene derivates. Chem. Pap. 64, 652–656 (2010). https://doi.org/10.2478/s11696-010-0038-2

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  • DOI: https://doi.org/10.2478/s11696-010-0038-2

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