INTERACTION OF DIVALENT METAL IONS WITH ISOTACTIC POLY(METHACRYLIC ACID).

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dc.contributor.authorBELLO, MOJI AFUSAT
dc.date.accessioned2014-02-11T09:40:16Z
dc.date.available2014-02-11T09:40:16Z
dc.date.issued1977-06
dc.descriptionThesis Presented to the Ahmadu Bello University for the Degree of Master of Science in the Faculty of Science. BY MOJI AFUSAT BELLO (MRS.) Department of Chemistry Ahmadu Bello University Zaria, Nigeria. JUNE, 1977.en_US
dc.description.abstractIsotactic polymethacrylic acid (PMA) has been prepared by hydrolysing the isotactic polymethylmethacrylate (PMMA) which was prepared from the monomer (MMA) using Grignard reagent initiator in toluene. The most suitable method of hydrolysis was found to involve the use of glacial acetic acid with para-toluene sulphonic acid as catalyst. This method of hydrolysis resulted in complete hydrolysis. The interaction between isotactic polymethacrylic acid (i-FMA) and divalent metal ions has been studied at 25oC and varying experimental conditions of ionic strength, degree of ionization, cation concentration using two different techniques. The experimental techniques used for these studies are equilibrium dialysis and potentiometric titration techniques. Results from the two methods of studies reveal that copper and zinc interact quite strongly with preionized isotactic EMA while magnesium only binds weakly. The binding strength of the ions has been found to be Cu+2>Zn+2>-Mg+2. Copper and zinc ions bind with i-PMA. to form complexes involving two carboxylate groups to one metal ion. The isotaotic PMA exists in compactly coiled state when unneutralised and at very low degrees of ionization (alpha<0.25>). The unionized acid was also found to be insolubleā€¢ The ionized molecules undergo configurational transition in the range alpha= 0.5 to 0.7. In chapter 4 the binding of divalent metal ions with isotactic PMA has been compared with that of conventional PMA using existing data. It was found that both copper and zinc bind more to the isotactic PMA than to conventional PMA.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1071
dc.language.isoenen_US
dc.subjectINTERACTION,en_US
dc.subjectDIVALENT,en_US
dc.subjectMETAL,en_US
dc.subjectIONS,en_US
dc.subjectISOTACTIC,en_US
dc.subjectPOTHACRYLIC ACID).POLY,en_US
dc.titleINTERACTION OF DIVALENT METAL IONS WITH ISOTACTIC POLY(METHACRYLIC ACID).en_US
dc.typeThesisen_US
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