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Synthesis of Sulfonated PET-g-GMA Fine Ion-exchange Fibers for Water Treatment by Photopolymerization and Their Adsorption Properties for Metal Ions  

Kwak Noh-Seok (Department of Chemical Engineering, College of Engineering, Chungnam National University)
Hwang Taek-Sung (Department of Chemical Engineering, College of Engineering, Chungnam National University)
Kim Sun-Mi (Department of Chemical Engineering, College of Engineering, Chungnam National University)
Yang Yun-Kyu (Department of Chemical Engineering, College of Engineering, Chungnam National University)
Kang Kyung-Seok (Siontech Co., Ltd.)
Publication Information
Polymer(Korea) / v.28, no.5, 2004 , pp. 397-403 More about this Journal
Abstract
The sulfonated PET-g-GMA ion-exchange fine fibers were synthesized by UV radiation-induced graft copolymerization using a photoinitiator, and their chemical structure and adsorption properties were investigated. The optimum values for synthetic conditions - UV intensity, reaction time, and reaction temperature were 450 W, 60 min, and $40^{\circ}C$, respectively. Maximum values of the degree of sulfonation and ion exchange capacity were 8.12 mmol/g and 3.25 meq/g, respectively. Tensile strength of sulfonated PET-g-GMA fine ion exchange fibers was lower than that of PET trunk polymer as the grafting reaction rates increased. It was shown that as for the adsorption rate of $Ca^{2+}$ and $Mg^{2+}$ by the sulfonated PET-g-GMA fine ion exchange fibers, magnesium ion is slower than calcium ion in the solution. However, in the mixture of the calcium and magnesium ions, the adsorption rate of calcium ion was much slower than that of magnesium ion.
Keywords
UV irradiated polymerization; fine ion exchange fiber; photoinitiator; adsorption;
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