algerian journal of environmental science and technology
Volume 5, Numéro 3, Pages 1079-1086
2019-03-30
Synthesis And Characterization Of Poly (epichlorohydrin-co-tetrahydrofuran) Using Green Catalyst Montmorillonite Algerian (maghnite-h+)
Authors : Hamam N. . Sari F. . Ferrahi M.i. . Belbachir M. .
Abstract
The copolymerization of Tetrahydrofuran (THF) with Epichlorohydrin (ECH) catalyzed by efficient and environmentally friendly Green catalyst called Maghnite-H+ was investigated, in the presence of a natural Algerian montmorillonite clay modified H2SO4, known as Maghnite-H, as proton source, a non-toxic and an efficient catalyst for cationic polymerization of many vinylic and hetero-cyclic monomers, this ecological catalyst replaces usual toxic catalysts such as Lewis and Bronsted acids, the oxonium ion of Tetrahydrofuran (THF) and Epichlorohydrin (ECH) propagated the reaction of copolymerization, the operating conditions were opted in order to obtain a maximum yield of the linear polymer and a high average molecular mass as well. We have studied the kinetic of the reaction by the effect of the time, the temperature, the amount of Maghnite-H+ and the proportion of monomers according to the changes in yield and the intrinsic viscosity, the structure of polymers obtained was confirmed by IR analysis. 1H NMR, the average molecular mass and the polydispersity indices were determined by GPC, after these kinetic studies and analyzes obtained, it is possible to propose at the end a reaction mechanism of the copolymerization.
Keywords
Green Catalyst; Maghnite-H+; Tetrahydrofuran; Epichlorohydrin; montmorillonite, copolymerization.
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