Abstract

Saeed Shirazian¹, Azam Marjani^1* and Fatemeh Azizmohammadi²

In the present paper, synthesis and investigation of the rheological behavior of a graft copolymer based on Pectin (Pec) and polyacrylonitrile (PAN) was carried out . The physical mixture of Pec and PAN was hydrolyzed by NaOH solution to yield Pec-poly(sodium acrylate-co-acrylamide) superabsorbent hydrogel. The nitrile groups of PAN were completely converted to a mixture of hydrophilic carboxamide and carboxylate groups during alkaline hydrolysis followed by in situ crosslinking of the PAN chains by the alkoxide ions of Pectin. A proposed mechanism for hydrogel formation was suggested and the hydrogel structures were confirmed by FTIR spectroscopy, SEM and porosimeter. The rheological behavior of the prepared gels were measured with rheometer.

Pectin; polyacrylonitrile; hydrogel; chemorheoloy; rheology

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