Synthesis of Polytetrahydrofuran Using Protonated Kaolin as A Solid Acid Catalyst

*Abdelhak Moumen -  Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University Department of Petrochemical and Process Engineering, Faculty of Technology, University of 20 Août 1955 Skikda, Algeria
Zhour Hattab -  Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, Algeria
Youghourta Belhocine -  Department of Petrochemical and Process Engineering, Faculty of Technology, University of 20 Août 1955 Skikda, Algeria
Kamel Guerfi -  Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, Algeria
Nacer Rebbani -  Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, Algeria
Received: 2 May 2018; Revised: 28 Nov 2018; Accepted: 12 Dec 2018; Published: 1 Aug 2019; Available online: 30 Apr 2019.
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Abstract

In this work, a non-toxic protonated kaolin clay exchanged with protons, was successfully applied as a solid acid catalyst for the polymerization of tetrahydrofuran (poly(THF)) at room temperature in the presence of acetic anhydride. Prior to using the kaolin as a catalyst, it was treated with HCl (0.1 M) and characterized using various analytical techniques. The amounts of catalyst and reaction time on the conversion of THF were investigated. Characterizations of nuclear magnetic Resonance of proton (1H-NMR), Fourier Transform Infrared spectroscopy (FT-IR), X-ray Diffraction (XRD), Optical Microscopy (OM), and Differential Scanning Calorimetry (DSC) techniques were used to examine the resulting polymer. X-ray characterization and DSC data indicated that the obtained poly(THF) is a highly crystalline substance. The results showed that protonated kaolin (kaolin–H+) has a high catalytic activity for the polymerization of THF with a conversion rate of 50.02% after 20 hours. Copyright © 2019 BCREC Group. All rights reserved.

 

Keywords
polymer synthesis; cationic polymerization; protonated kaolin clay; polytetrahydrofuran

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