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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 polymerisation of many heterocyclic and vinylic monomers (Belbachir, M. U.S. Patent. 066969.0101 Ã¢Â€Â“2001). The structural compositions of both Ã¢Â€ÂœMaghniteÃ¢Â€Â and Ã¢Â€ÂœH-MaghniteÃ¢Â€Â have already been determined. Epichlorhydrin monomer, which is polymerizable by a cationic process (Odian,G. La Polymerisation: Principes et Applications; Ed.Technica: New York, 1994; pp 222-226), was used to elucidate the polymerization cationic character. The polymerization was performed under optimum conditions at 20Ã‚Â°C. Experiments revealed that the polymerisation induced by Ã¢Â€ÂœH-MaghniteÃ¢Â€Â proceeds in bulk. In bulk polymerization, Epichlorhydrin conversion increases with increasing Ã¢Â€ÂœH-MaghniteÃ¢Â€Â concentration and temperature

An Acid Exchanged Montmorillonite Clay-Catalyzed Synthesis of Polyepichlorhydrin