A Green Synthesis of Polylimonene Using Maghnite-H+, an Exchanged montmorillonite clay, as Eco-catalyst

DOI: https://doi.org/10.9767/bcrec.0.0.2692.xxx-xxx
Copyright (c) 2018 Bulletin of Chemical Reaction Engineering & Catalysis
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Article Info
Submitted: 26-05-2018
Published: 22-09-2018
Section: Original Research Articles
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A new green polymerization technique to synthesis polylimonene (PLM) is carried out in this work. This technique consists on using Maghnite-H+ as eco-catalyst to replace Friedel-Crafts catalysts which are toxics. Maghnite-H+ is a montmorillonite silicate sheet clay which is prepared through a simple exchange process. Polymerization experiments are performed in bulk and in solution using CH2Cl2 as solvent. Effect of reaction time, temperature and amount of catalyst is studied, in order to find the optimal reaction conditions. The polymerization in solution leads to the best yield (48,5%) at -5°C for a reaction time of 6 h but the bulk polymerization, that is performed at 25°C, remains preferred even if the yield is lower (40.3%) in order to respect the principles of a green chemistry which recommend syntheses under mild conditions, without solvents and at room temperature. The structure of the obtained polymer (PLM) is confirmed by FT-IR and Nuclear Magnetic Resonance of proton (1H-NMR). The glass transition temperature (Tg) of the polylimonene is defined using Differential Scanning Calorimetry (DSC) and is between 113°C and 116°C. The molecular weight of the obtained polymer is determined by Gel Permeation Chromatography (GPC) analysis and is about 1360 g/mol.

Received: 26th May 2018; Revised: 11st September 2018; Accepted: 22nd September 2018

Keywords

Polylimonene, Maghnite-H+, eco-catalyst, green polymerization, GPC, 1H-NMR

  1. Hodhaifa DERDAR 
    Laboratory of Polymer Chemistry, Department of Chemistry, Faculty of Exact and Applied Sciences, University of Oran-1. Ahmed Benbella. BP N° 1524 El M'Naouar, 31000 Oran, Algeria, Algeria
    department of chemistry, University of Oran-1. Ahmed Benbella.
  2. Mohammed BELBACHIR 
    Laboratory of Polymer Chemistry, Department of Chemistry, Faculty of Exact and Applied Sciences, University of Oran-1. Ahmed Benbella. BP N° 1524 El M'Naouar, 31000 Oran, Algeria, Algeria
    department of chemistry, University of Oran-1. Ahmed Benbella.
  3. Amine HARRANE 
    Laboratory of Polymer Chemistry, Department of Chemistry, Faculty of Exact and Applied Sciences, University of Oran-1. Ahmed Benbella. BP N° 1524 El M'Naouar, 31000 Oran, Algeria, Algeria
    department of chemistry, University of Oran-1. Ahmed Benbella