Abstract

Fatiha Reguieg, Nabahat Sahli, Mohammed Belbachir

DOI : http://dx.doi.org/10.13005/ojc/310343

A series of composites hydrogels based on Poly (1,3-dioxolane) (PDXL),water soluble polymer, were synthesized  directly in water by free-radical homopolymerization of a,w-methacryloyloxy PDXL macromonomers using hydrophilic sodium Montmorillonite clay: Maghnite-Na⁺ (Mag-Na⁺) and potassium persulfate  as an initiator. These materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (ATG)  and their equilibrium swelling behavior in water and were compared with those of pure hydrogels prepared without Mag-Na⁺. X-ray diffraction and Infrared spectroscopy confirmed insertion of clay into polymer. The thermal decomposition temperature of the hydrogels based on maghnite-Na⁺ was found to be higher than of pure hydrogels. At the same time, the influence of the macromonomer precursor molar mass value, its concentration and the quantities of Mag-Na⁺, on the values of the volume degree of equilibrium swelling were studied. The results showed that the volume degree of equilibrium swelling was investigated as a function of the clay content. However, whether the concentration of macromonomer precursor increased, the volume or weight degree of equilibrium swelling of hydrogels all decreased. The addition of Mag-Na⁺ particles changed the crosslinking density of hydrogels.

poly(1,3-dioxolane); macromonomers; hydrogel nanocomposite; maghnite-H+; maghnite-Na+

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