Synthesis and characterization of acrylic fibers-<Emphasis Type="Italic">g</Emphasis>-polyacrylamide |
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Authors: | Meltem Çelik Mohammad L Qudrat Emel Akyüz Leyla Açik |
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Institution: | 1.Department of Chemistry, Faculty of Science,Ankara University,Tando?an, Ankara,Turkey;2.Graduate School of Natural and Applied Sciences,Ankara University,Be?evler, Ankara,Turkey;3.Department of Biology, Faculty of Science,Gazi University,Teknikokullar, Ankara,Turkey |
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Abstract: | Graft copolymerization of acrylamide onto commercial acrylic fibers was carried out using benzoyl peroxide as a free-radical
initiator in aqueous medium within the 75–95 °C temperature range. In this study, the effects of initiator and monomer concentration,
the amount of fiber, polymerization time, and temperature on the graft yield were investigated. The optimum concentration
for initiator was found to be 2.0×10−3 mol/l and the optimum temperature of 85 °C. The activation energy of the reaction was calculated to as 35.81 kJ/mol at the
temperature interval of 75–95 °C. The structures and morphologies characterization of grafted fibers was investigated by Fourier
transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The thermogravimetric
analysis data showed that the thermal stability of the acrylic fibers increased with graft yield. The scanning electron photographs
showed that the homogeneous appearance of the fiber surface changed and a shell-like heterogeneous structure occurred at the
surface with an increasing degree of grafting. The moisture content, water absorption, dyeability, and antimicrobial activity
of grafted acrylic fibers were also reported. The results showed that grafting of polyAAm improved the moisture contain, water
absorption, dyeability, and antimicrobial activity of fiber. |
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