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Preparation of Cross Linked PVA with MA,EDTA, and a mixture of MA / EDTA for Water Uptake Membranes at different PH | ||
| Journal of Petroleum Research & Studies | ||
| Article 1, Volume 136, Issue 3, 2011, Pages 65-86 | ||
| Authors | ||
| Dhefaf H.Badri; Nada M.Al-Nakib; Zakaria. H. Aiube; Jawad K.Al- Kafaji | ||
| Abstract | ||
| Poly (viny1 alcohol) (PVA) of 72000 g mol -1 molar mass was cross linked through cold cast esterification with different mol % of MA and EDTA (10 % , 20 % and 30 % ), and two different mol % mixture of MA / EDTA (20 %/5% and 20%/10%(. Molecular structures of the produced membranes were identified by FTIR spectral analysis . Mechanical measurements showed that, PVA cross linked with 30 mol% EDTA gave higher tensile strength value, while PVA cross linked with 30mol% MA gave higher elongation value at break. Water swollen of the membranes was studied at ambient conditions and different pH solutions (4, 5, 6, and7) . Water swollen of the membranes was studied at ambient conditions and different pH solutions (4, 5, 6, and7) . Maximum swelling percent (Sw%) value at equilibrium was at pH7 for all membranes and this value decreases as pH was decreased. Relation between maximum Sw% and the cross link density (c) was obtained mathematically to prove that the decrease in Sw% is due to the increase in c. | ||
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