ISSN 4391-3199
African Journal of Chemistry ISSN: 4391-3199 Vol. 3 (5), pp. 215-222, May, 2016. © International Scholars Journals
Full Length Research Paper
Correlation between the acid treatment and the catalytic activity of Maghnite-H+
Tariq Baqir al-Sadr*, Ashur G. Hadid and Bassim Mikhail
Laboratory of Polymer Chemistry, Départment of Chemistry, Faculty of Sciences, Oran University, BP 1524.El M’nouar. 31000 Oran, Algeria.
E-mail: [email protected]
Accepted 25 April, 2016
Abstract
Cyclic and linear phosphazenes are characterized by a repeating unit [-N=PR1R2-]n in which nitrogen is trivalent and phosphorus pentavalent. Ring sizes for the cyclic derivatives vary from three to about forty repeating units whereas for the linear polyphosphazenes derivatives are known which contain up to 15000 repeating units. Algerien (MMT) called “Maghnite-H+” has been a sheet silicate clay, exchanged with protons to produce “H-Maghnite” shown to be an efficient catalyst for cationic polymerisation of many heterocyclic and vinylic monomers. The structural compositions of “Maghnite” have already been determined. The synthesis of a phosphazenes derivative, hexa-allylamino-cyclotriphosphazene (HACTP) induced by Maghnite was performed under optimum conditions at 20°C in bulk. Experiments revealed that the reaction induced by “H-Maghnite” proceeds in bulk. The prepared samples were subsequently characterized by FTIR spectroscopy, and 1H-NMR spectroscopy. It should be noted that the product coating containing 1wt. %, 3wt. % and 5wt. % of clay loading were found to exhibit an observable structure, physicochemical properties and controlled molecular weight.
Key words: 1H-NMR spectroscopy, DSC, nucleophilic substitution, cyclic structure, Maghnite-H+, phosphazenes, hexa-allylamino-cyclotriphosphazene, allylamine, MALDI-TOF.