DOI: https://doi.org/10.9767/bcrec.14.2.2605.294-300

Synthesis of Polytetrahydrofuran Using Protonated Kaolin as A Solid Acid Catalyst

1Laboratory of Water Treatment and Valorization of Industrial Waste, Department of Chemistry, Faculty of Sciences, Badji-Mokhtar University, BP12, 23000, Annaba, Algeria

2Department of Petrochemical and Process Engineering, Faculty of Technology, University of 20 Août 1955 Skikda, Algeria

Received: 2 May 2018; Revised: 28 Nov 2018; Accepted: 12 Dec 2018; Available online: 30 Apr 2019; Published: 1 Aug 2019.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2019 by Authors, Published by BCREC Group under http://creativecommons.org/licenses/by-sa/4.0.

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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. 

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Keywords: polymer synthesis; cationic polymerization; protonated kaolin clay; polytetrahydrofuran
Funding: University of Annaba

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Section: Original Research Articles
Language : EN
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