Studies of Structural Changes in PAN Fibers with Various Initial Structures under the Influence of Thermal Treatment in Media

• Autorzy: Marczak Ewa , Marczak Piotr , Sztajnowski Sławomir , Lipp-Symonowicz Barbara

Identyfikatory

DOI

10.1515/aut-2018-0044

• Języki publikacji: EN

Abstrakty

EN

The aim of the paper is to assess the range and the mechanisms of transformations of the molecular structure and the physical microstructure of polyacrylonitrile (PAN) fibers produced by various manufacturers under the influence of thermal treatment in different conditions. The thermal treatments were carried out in different media (such as air, water, and steam), at various temperatures, and using different periods of treatment. Changes in the molecular structure were assessed using infrared (IR) absorption spectroscopy and evaluation of the differences in molecular cohesion energy of the fiber material during the dissolution processes. Changes in the fibers’ physical microstructure were investigated using densitometric, IR spectrophotometric, and X-ray diffraction methods; for assessment of both the reconstruction process of the paracrystalline matter of the fibers and the changes in the fibers’ total orientation, interferential polarization microscopy was used.

Słowa kluczowe

EN

polyacrylonitrile (PAN) fibers; thermal treatment; molecular structure; physical microstructure; Fourier transform infrared; FTIR; wide angle X-ray scattering; WAXS; critical dissolution time; CDT

PL

włókna poliakrylonitrylowe (PAN); obróbka termiczna; struktura molekularna; mikrostruktura fizyczna; FTIR; WAXS; CDT

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2019
• Tom: Vol. 19, no. 3
• Strony: 217--227
• Opis fizyczny: Bibliogr. 47 poz.

Twórcy

autor

Marczak Ewa

• Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland

autor

Marczak Piotr

• Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland

autor

Sztajnowski Sławomir

• Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland

autor

Lipp-Symonowicz Barbara

• Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).