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Characteristics of Crystallization of Fibers in the Formation of Filaments from a Mixture of Polypropylene with Small Amounts of Polyethylene

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Fibre Chemistry Aims and scope

X-ray diffraction analysis shows that in complex polypropylene filaments (CPF) modified with lowdensity polyethylene (LDPE) the latter is present as a single anisotropic phase. It has been proven that LDPE promotes further crystallization of polypropylene (PP) in the production of CPF due, apparently, to the mutual influence of the PP chains and LDPE within the amorphous phase providing increased segmental mobility of the molecules and the additional formation of small crystallites of PP, in particular, in the transition from lamellar sheet structure to fibrillar formations of stretched chains during orientational drawing. The PP crystallization effect manifests to the maximum extent at low concentrations of LDPE in CPF – 0.5-7.5 wt. %. Introduction of high density polyethylene (HDPE) into CPF to a lesser extent promotes crystallization of PP in comparison with LDPE, which can be due to structural features of the crystalline phases of polyethylene present in the fibers determining their different effect on the mobility of macromolecules in the matrix of fibers and, consequently, the crystallization of polypropylene during thermal drawing of the fibers.

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This work was supported by the Russian Foundation for Basic Research (project No. 13-03-12065 ofi_m) with the use of devices and instruments from the Collective Use ISUCT – ISC RAS Center within the state task of the Ministry of Education and Science of the Russian Federation.

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Authors and Affiliations

  1. Ivanovo State University of Chemistry and Technology, Ivanovo, Russia

    A. E. Zavadskii

  2. Institute of Solution Chemistry of the Russian Academy of Sciences, Ivanovo, Russia

    S. Yu. Vavilova & N. P. Prorokova

Authors
  1. A. E. Zavadskii
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  2. S. Yu. Vavilova
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  3. N. P. Prorokova
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Correspondence to A. E. Zavadskii.

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Translated from Khimicheskie Volokna, No. 2, pp. 12-16, March – April, 2016.

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Zavadskii, A.E., Vavilova, S.Y. & Prorokova, N.P. Characteristics of Crystallization of Fibers in the Formation of Filaments from a Mixture of Polypropylene with Small Amounts of Polyethylene. Fibre Chem 48, 104–108 (2016). https://doi.org/10.1007/s10692-016-9750-1

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  • DOI: https://doi.org/10.1007/s10692-016-9750-1

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