New approach for the polymerization of 2‐chloroethyl vinyl ether using a maghnite clay as eco‐catalyst

Chabani, Malika; Yahiaoui, Ahmed; Hachemaoui, Aïcha; Belbachir, Mohammed

doi:10.1002/app.34242

Cited by 11 publications

(12 citation statements)

References 23 publications

(21 reference statements)

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“…2‐chloroethyl vinyl ether (2CLEVE) is industrially important molecule. It is used in the manufacturing of cellulose ethers, anesthetics and sedatives, and also as a precursor of polymers with diverse possible uses such as thickeners, solubilising agents, cross linking agents, flocculating agents, dispersants, adhesives, or binders, laser writing . Due to its extensive use, the source of 2ClEVE in atmosphere is purely anthropogenic.…”

Section: Introductionsupporting

confidence: 91%

Gas Phase OH Radical Reaction with 2‐Chloroethyl Vinyl Ether in the 256–333 K Temperature Range: A Combined LP‐LIF and Computational Study

2018

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The absolute rate coefficient for the gas phase reaction of OH radical with 2-chloroethyl vinyl ether (H 2 C = CH-O-CH 2 CH 2 Cl, 2ClEVE) has been measured using the laser photolysis (LP)laser induced fluorescence (LIF) technique. The kinetics measurements were done over the temperature range of 256-333 K. The bimolecular rate coefficients obtained, k(T), showed Arrhenius type behaviour which were fitted to the expression k(T) = (4.18 AE 0.55) 3 10 À12 exp[(700 AE 70)/T] cm 3 molecule À1 s À1 .The room temperature rate coefficient shows pressure independent behaviour in the range of 10-40 Torr. The reaction shows weak negative temperature dependence. A detail computational studies involving the energies and structures of the reactants, transition states and products were performed using Complete Basis Set (CBS) and Quadratic Configuration Interaction with Single and Double substitutions with a Triples contribution to the energy, QCISD(T), method to elucidate the reaction mechanism. The results suggest that the major pathways for the reaction proceeds through addition of OH radical to the C=C double bond and the H atom abstraction from the -O-CH 2 -group and they are competitive in nature. The tropospheric lifetime, radiative efficiency (RE) and the global warming potential (GWP) for 2-chloroethyl vinyl ether (2ClEVE) have been also determined.[a] Dr.

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Section: Introductionsupporting

confidence: 91%

Gas Phase OH Radical Reaction with 2‐Chloroethyl Vinyl Ether in the 256–333 K Temperature Range: A Combined LP‐LIF and Computational Study

2018

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“…5 show that polymerization takes place slowly and smoothly, reaching a conversion of 88 % at the end of 8 h; after this time it slows down gradually and the yield becomes almost constant (88 % at 8 h, 94 % at 17 h; 96 % at 20 h and 96 % at 24 h); this is probably the result of an increase in the medium viscosity, and similar results are obtained by Chabani et al [23] in the polymerization of 2-chloroethyl vinyl ether.…”

Section: Effect Of Reaction Timesupporting

confidence: 86%

Green Polymerization of 4-(Oxiran-2-ylmethyl)morpholine

Seghier

Belbachir

2015

Arab J Sci Eng

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Synthesis and cationic polymerization of a new monomer 4-(oxiran-2-ylmethyl)morpholine (OMM) is reported. The monomer was prepared by the reaction of morpholine with epichlorohydrine followed by treatment with sodium hydroxide. The green polymerization of OMM was performed in bulk under suitable condition at temperature 40 • C using an activated smectite clay catalyst, known as Maghnite-H + (Mag-H + ) as proton source. The products are proven by infrared spectroscopy (IR) as well as by nuclear magnetic resonance spectroscopy ( 1 H NMR, 13 C NMR), and characterized by intrinsic viscosity.

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“…This finding is in good agreement with the proposal that Na + -MMT is present as the active initiator species since the number of those species should be related to their surface area. Ferrahi et al and Yahiaoui et al obtain Similar results [40,41]. Figure 10 shows the yield of polymer versus time for the polymerization of AMS using Na + - Figure 7.…”

Section: Effect Of the Amount Of Na + -Mmt On The Polymerizationsupporting

confidence: 59%

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

Ayat

Belbachir

Rahmouni

2016

Bull. Chem. React. Eng. Catal.

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A new and efficient catalyst of Na-Montmorillonite (Na + -MMT) was employed in this paper for α-methylstyrene (AMS) cationic polymerization. Maghnite clay, obtained from Tlemcen Algeria, was investigated to remove heavy metal ion from wastewater. "Maghnite-Na" is a Montmorillonite sheet silicate clay, exchanged with sodium as an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers. The various techniques, including 1 H-NMR, 13 C-NMR, IR, DSC and Ubbelohde viscometer, were used to elucidate structural characteristics and thermal properties of the resulting polymers. The structure compositions of "MMT", "H + -MMT" and "Na + -MMT" have been developed. It was found that the cationic polymerization of AMS is initiated by Na + -MMT at 0 °C in bulk and in solution. The influences of reaction temperature, solvent, weight ratio of initiator/monomer and reaction time on the yield of monomer and the molecular weight are investigated. The kinetics indicated that the polymerization rate is first order with respect to the monomer concentration. A possible mechanism of this cationic polymerization is discussed based on the results of the 1 H-NMR Spectroscopic analysis of these model reactions. A cationic mechanism for the reaction was proposed. From the mechanism studies, it was showed that monomer was inserted into the growing chains.

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New approach for the polymerization of 2‐chloroethyl vinyl ether using a maghnite clay as eco‐catalyst

Cited by 11 publications

References 23 publications

Gas Phase OH Radical Reaction with 2‐Chloroethyl Vinyl Ether in the 256–333 K Temperature Range: A Combined LP‐LIF and Computational Study

Gas Phase OH Radical Reaction with 2‐Chloroethyl Vinyl Ether in the 256–333 K Temperature Range: A Combined LP‐LIF and Computational Study

Green Polymerization of 4-(Oxiran-2-ylmethyl)morpholine

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

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