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Ã¢Â€ÂœMaghniteÃ¢Â€Â a montmorillonite sheet silicate clay, exchanged with protons to produce Ã¢Â€ÂœH-MaghniteÃ¢Â€Â is an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers (Belbachir, M. U.S. Patent. 066969.0101 Ã¢Â€Â“2001). The structure compositions of both Ã¢Â€ÂœMaghniteÃ¢Â€Â and Ã¢Â€ÂœH-MaghniteÃ¢Â€Â 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 (Ã¢Â€Â“7Ã‚Â°C). Experiments revealed that polymerization induced by Ã¢Â€ÂœH-MaghniteÃ¢Â€Â 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 Ã¢Â€ÂœH-MaghniteÃ¢Â€Â proportion

A Protons Exchanged Montmorillonite Clay as an Efficient Catalyst for the Reaction of Isobutylene Polymerization