Correlation between the acid treatment and the catalytic activity of Maghnite-H+

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 “HMaghnite” 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, hexaallylamino-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