Influence of Microwave Synthesis Dissolution Technique on the Kinetics Properties of Polymer Dope Solution
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The application of Microwave Irradiation has become a frequent heating source in organic and inorganic materials synthesis. Inspired by this vast achievement, the use of microwave irradiation is highly studied for polymer synthesis. The influence of modified microwave system on the solubility and kinetics properties of the polyethersulfone (PES) dope solution has been investigated. A modified microwave (MW) assisted closed heating system was applied to prepare the PES dope solution in single solvent; dimethylformamide (DMF) and mixture of two solvents DMF/acetone for membrane fabrication. Providentially, most of the synthetic polymeric membrane materials are polar and dipolar which is a very important factor in microwave processing. New MW systems have given incredible properties in terms of viscosity, shear stress, shear rate and yield stress of polymer dope solutions. The results revealed that MW assisted pure PES solution exhibits pseudoplastic and Newtonian behaviour respectively. However, PES solution containing the two solvent system exhibits dilatants behaviour, which obeys the power-law. The apparent viscosity of the PES dope solutions prepared using the DMF is lower as compared to those prepared using the DMF/acetone. Rheological properties measured include apparent viscosity at various shear rates. Subsequently the flow behaviour (n) and consistency index (k) is determined.
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