El Sayed Nasef , Mohamed Mahmoud and Saidi, Hamdani and K. Z., Mohd. Dahlan (2010) Kinetic investigations of graft copolymerization of sodium styrene sulfonate onto electron beam irradiated poly(vinylidene fluoride) films. Radiation Physics and Chemistry, 80 (1). pp. 66-75. ISSN 0969-806X
Official URL: http://dx.doi.org/10.1016/j.radphyschem.2010.08.01...
Graftcopolymerization of sodiumstyrenesulfonate (SSS) onto electronbeam (EB) irradiated poly(vinylidene fluoride) (PVDF) films was investigated to find out a simple preparation process for sulfonic acid proton exchange membranes with respect to monomer concentration, absorbed dose, temperature, film thickness and storage time. The reaction order of the monomer concentration and absorbed dose of grafting was found to be 2.84 and 1.20, respectively. The overall activation energy for graftcopolymerization reaction was calculated to be 11.36 kJ/mol. The initial rate of grafting was found to decrease with an increase in the film thickness. The trapped radicals in the irradiated PVDF films remained effective in initiating the reaction without considerable loss in grafting level up to 180 days, when stored under −60 °C. The presence and distribution of polystyrene sulfonategrafts in the obtained membranes were observed by Fourier transform infrared (FTIR) spectroscopic analysis, scanning optical microscope and scanning transmission electron microscopy (STEM) coupled with X-ray energy dispersive (EDX), respectively.
|Uncontrolled Keywords:||radiation-induced graftcopolymerization, sodiumstyrenesulfonate, PVDF films, electronbeam, proton exchange membranes|
|Subjects:||Q Science > QD Chemistry|
|Deposited By:||Liza Porijo|
|Deposited On:||29 Jun 2012 03:35|
|Last Modified:||20 Jul 2012 04:08|
Repository Staff Only: item control page