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Stepwise behavior of surface properties caused by phase inversion in a polymer blend filled with dispersed iron

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Abstract

The surface properties, mechanical characteristics, and morphology of the PP/CPA-Fe composite based on a polymer blend of polypropylene (PP) and copolyamide (CPA) filled with dispersed iron (Fe) were studied. The effect of stepwise behavior of the surface energy and its dispersive and polar components was previously unknown and discovered for the first time when the composition of the polymer blend was varied in the entire composition range. The surface parameters were found by measuring the contact angle of the testing liquids (water and diiodomethane) and using Owens and Wendt’s approach. Stepwise behavior of the surface energy was caused by the morphology of the composite. The largest change in the surface parameters occurs in the phase inversion region, where the phases of PP and CPA-Fe are co-continuous. Below (for the structure of PP matrix with the inclusions of CPA-Fe) and above (for the structure of CPA-Fe matrix with the inclusions of PP) this interval, changes in the surface energy are minor. In the phase inversion region, the relative contributions of the polar and dispersive parts to the total surface energy were changed from 1 to 14% and from 99 to 86%, respectively that was caused by the interface interaction of the components of the blend. On the contrary, the values of elastic modulus (E) remain constant in the phase inversion region, while the largest changes occur below and above this region.

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Acknowledgements

This work was partially supported by the Science Grant Agency VEGA, project No. 2/0010/18 (Slovakia). A.M. would also like to acknowledge the support of the SAIA agency for the project and stay at Polymer Institute in Bratislava, Slovakia. The authors are grateful to the researchers of the Petru Poni Institute of Macromolecule Chemistry (Iasi, Romania) Dr. M. Zanoaga and Dr. F. Tanasa for kindly providing copolyamide polymer.

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Authors and Affiliations

  1. Institute of Macromolecular Chemistry of National Academy of Sciences of Ukraine, 48 Kharkivske shausse, Kyiv, Ukraine

    Yevgen Mamunya

  2. Taras Shevchenko National University of Kyiv, Physics faculty, 4 Prospekt Hlushkova, Kyiv, Ukraine

    Andrii Misiura

  3. Polymer Institute, Dubravska cesta 9, 845 41, Bratislava, Slovakia

    Michal Prochazka & Maria Omastova

Authors
  1. Yevgen Mamunya
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  2. Andrii Misiura
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  3. Michal Prochazka
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  4. Maria Omastova
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Contributions

Mamunya: research idea and concept, supervision, writing draft version. Misiura: experimental measurements, calculations, ordering of the references, Procházka: experimental measurements, calculations. Omastova: writing parts of the draft text, correcting, editing.

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Correspondence to Yevgen Mamunya.

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Mamunya, Y., Misiura, A., Prochazka, M. et al. Stepwise behavior of surface properties caused by phase inversion in a polymer blend filled with dispersed iron. J Polym Res 28, 44 (2021). https://doi.org/10.1007/s10965-021-02410-7

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  • DOI: https://doi.org/10.1007/s10965-021-02410-7

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