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A Protons Exchanged Montmorillonite Clay as an Efficient Catalyst for the Reaction of Isobutylene Polymerization
Laboratoire de Chimie des Polymères, Département de Chimie, Faculté des Sciences, Université d’Oran Es-Senia BP N° 1524 El M’Naouar, 31000 Oran Algerie
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Received: 27 April 2002; Accepted: 13 May 2002 / Published: 31 July 2002
Abstract: “Maghnite” a montmorillonite sheet silicate clay, exchanged with protons to produce “H-Maghnite” is an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers (Belbachir, M. U.S. Patent. 066969.0101 –2001). The structure compositions of both “Maghnite” and “H-Maghnite” have been developed. Isobutylene monomer, wich is polymerizable only by cationic process (Odian,G. La Polymerisation :principes et Applications; Ed.Technica: New York, 1994; pp 222-226), was used to elucidate the cationic character of polymerization. The polymerization was performed under suitable conditions at isobutylene vaporization temperature (–7°C). Experiments revealed that polymerization induced by “H-Maghnite” proceed in bulk and in solution. In contrast to findings with methylene chloride CH2Cl2 as a polar solvent, polymerization yields with hexane C6H14 non-polar solvent is very significant. In bulk polymerization, Isobutylene conversion increases with increasing “H-Maghnite” proportion.
Keywords: Maghnite; Montmorillonite; Catalyst; Isobutylene; Polyisobutylene
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Harrane, A.; Meghabar, R.; Belbachir, M. A Protons Exchanged Montmorillonite Clay as an Efficient Catalyst for the Reaction of Isobutylene Polymerization. Int. J. Mol. Sci. 2002, 3, 790-800.
Harrane A, Meghabar R, Belbachir M. A Protons Exchanged Montmorillonite Clay as an Efficient Catalyst for the Reaction of Isobutylene Polymerization. International Journal of Molecular Sciences. 2002; 3(7):790-800.
Harrane, Amine; Meghabar, Rachid; Belbachir, Mohammed. 2002. "A Protons Exchanged Montmorillonite Clay as an Efficient Catalyst for the Reaction of Isobutylene Polymerization." Int. J. Mol. Sci. 3, no. 7: 790-800.