Synthesis and characterization of diaminomaleonitrile-functionalized polystyrene grafts for application in pervaporation separation
Hamada H. Abdel-Razik
Chemistry Department, Faculty of Science, Mansoura University, New Damietta, 34517, Egypt
Received: 11 August 2007 Revised: 6 December 2007 Accepted: 12 December 2007
Abstract: Synthesis, characterization and application of diaminomaleonitrile (DAMN)-functionalized polystyrene grafts were studied.
Dibenzoyle peroxide (BP) was used as an initiator. Optimum conditions for grafting were found to be c(DAMN) = 0.5 M, c(BP) = 0.016 M, θ = 85 °C and t = 4 h. Water uptake of the polystyrene graft membranes was found to increase with the increase of the grafting yield. The
chemical structure, thermal characteristics and thermal stability of the obtained membranes were investigated by means of
FTIR spectroscopy, differential scanning calorimetry, and thermal gravimetric analysis. Polystyrene graft membrane with the
degree of grafting of up to 96 % was found to be useful for the pervaporation separation of phenol/water mixtures.
Keywords: graft copolymerization - polystyrene - pervaporation
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Chemical Papers 62 (4) 404–409 (2008)