Methyl Methacrylate and Alpha-Methyl Styrene: New Strategy for Synthesis of Bloc Copolymers for Use in Potential Biomedical Applications Generated by an Ecologic Catalyst Called Maghnite (Algerian MMT)

Moulkheir Ayat -  Laboratory of Polymer Chemistry, Départment of Chemistry, Faculty of Sciences, Oran1. Université Ahmed benbella , BP 1524.El M’nouar. 31000 Oran,, Algeria
Mohamed Belbachir -  Laboratory of Polymer Chemistry, Départment of Chemistry, Faculty of Sciences, Oran1. Université Ahmed benbella , BP 1524.El M’nouar. 31000 Oran,, Algeria
*Abdelkader Rahmouni -  Laboratory of Polymer Chemistry, Départment of Chemistry, Faculty of Sciences, Oran1. Université Ahmed benbella , BP 1524.El M’nouar. 31000 Oran,, Algeria
Received: 28 Jun 2016; Published: 11 Oct 2016.
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Abstract

A new model for synthesis of the plastics, block copolymers were prepared from methyl methacrylate (MMA) and alpha-methyl styrene (α-MS) by cationic copolymerization in the presence of a new and efficient catalyst of “Maghnite-Na” at 0 °C in bulk. In this paper, the copolymerization of α-MS and MMA was induced in heterogeneous phase catalyzed by Maghnite-Na was investigated under suitable conditions. The “Maghnite-Na” is a montmorillonite sheet silicate clay, with exchanged sodium cations to produce Na-Montmorillonite (Na+-MMT) obtained from Tlemcen, Algeria, was investigated to remove heavy metal ion from wastewater as an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers. The synthesized copolymer were characterized by Nuclear Magnetic Resonance (NMR-1H, NMR-13C), FT-IR spectroscopy, Differential Scanning Calorimetry (DSC), and Gel Permeation Chromatography (GPC) to elucidate structural characteristics and thermal properties of the resulting copolymers. The structure compositions of “MMT”, “H+-MMT” and “Na+-MMT” have been developed. The effect of the MMA/α-MS molar ratio on the rate of copolymerization, the amount of catalyst, temperature and time of copolymerization on yield of copolymers was studied. The yield of copolymerization depends on the amount of Na+-MMT used and the reaction time. The kinetic studies indicated that the polymerization rate is first order with respect to monomer concentration. A possible mechanism of this cationic polymerization is discussed based on the results of the 1H-NMR Spectroscopic analysis of these model reactions. A cationic mechanism for the reaction studies showed that monomer was inserted into the growing chains. Copyright © 2016 BCREC GROUP. All rights reserved

Received: 2nd May 2015; Revised: 24th February 2016; Accepted: 15th March 2016

How to Cite: Ayat, M., Belbachir, M., Rahmouni, A. (2016). Methyl Methacrylate and Alpha-Methyl Styrene: New Strategy for Synthesis of Bloc Copolymers for Use in Potential Biomedical Applications Generated by an Ecologic Catalyst called Maghnite (Algerian MMT). Bulletin of Chemical Reaction Engineering & Catalysis, 11 (3): 316-329 (doi: 10.9767/bcrec.11.3.571.316-329)

Permalink/DOI: http://doi.org/10.9767/bcrec.11.3.571.316-329

Keywords
catalyst; clay; Na-montmorillonite; cationic copolymerization; methyl methacrylate; alpha-methylstyrene; block copolymerization; mechanism

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