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Interferometric investigation of the opto‐mechanical and structural properties of iPP/TiO 2 nanocomposite fibers
Author(s) -
Sokkar T. Z. N.,
ElBakary M. A.,
Raslan M. I.,
AlKalali N. A.,
ElDessouky H. M.
Publication year - 2019
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.23212
Subject(s) - materials science , nanocomposite , composite material , fiber , interferometry , optical fiber , refractive index , birefringence , extrusion , optics , optoelectronics , physics
Fibers that missing specific features and functionalities could be innovated and functionalised via nano additives, in particular metal oxides. Titanium oxide (TiO 2 ) nanoparticles have been added to isotactic polypropylene (iPP) to form iPP/TiO 2 nanocomposite fibers. Three samples of iPP/TiO 2 fibers were extruded at three extrusion speeds 25, 50, and 78 m/min were considered in this study. Mach–Zehnder interferometer was used to assess the changes in the opto‐mechanical and geometrical parameters of iPP/TiO 2 nanocomposite fibers along the fiber axis. The mechanical drawing device along with Mach–Zehnder interferometer was utilized to stretch the filaments to different draw ratios. The effect of mechanical cold drawing and extrusion speed on the optical and physical characteristics of iPP/TiO 2 nanocomposite fibers were determined along the fiber axis. The optical and physical variation along the nanocomposite samples were characterized by measuring their refractive indices, birefringence, refractive index profile along the fiber axis. The diffraction of He–Ne laser beam was used to define the variation of the fiber diameter along the fiber axis through their cross‐sectional area and shape. A sample of uniform diameter from neat iPP fibers was used as reference material for studying the variation of the iPP/TiO 2 fiber diameter along the fiber axis. As result, the iPP/TiO 2 nanocomposite fibers exhibited nonuniform diameters. The dispersion of TiO 2 particles in nanocomposite fibers influences the properties' consistency along and across the fiber.