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Browsing by Author "Egbuchunam, Theresa Obuajulu"
Now showing items 1-8 of 8
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The effect of bio-based plasticizer on the permanence and water vapour transport properties of PVC plastigels
Okieimen, Felix Ebhodaghe; Egbuchunam, Theresa Obuajulu; Balköse, Devrim (Serbian Chemical Society, 2008)Novel formulations of PVC plastisols based on blends of bio-based and synthetic plasticizers were prepared and characterized. A traditional phthalate plasticizer, dioctylphthalate, was replaced in the plastisols studied ... -
Effect of zinc soaps of rubber seed oil (RSO) and/or epoxidised rubber seed oil (ERSO) on the thermal stability of PVC plastigels
Egbuchunam, Theresa Obuajulu; Balköse, Devrim; Okieimen, Felix Ebhodaghe (Elsevier, 2007-08)Zinc soaps of rubber seed oil (RSO) and epoxidised rubber seed oil (ERSO) were prepared and their use as PVC stabilizers investigated. Characterization of Zn soaps of RSO prepared by different techniques and ERSO gave ... -
Formulation and properties' evaluation of PVC/(dioctyl phthalate)/ (epoxidized rubber seed oil) plastigels
Balköse, Devrim; Egbuchunam, Theresa Obuajulu; Okieimen, Felix Ebhodaghe (Wiley, 2008-06)Epoxidized rubber seed oil (4.5% oxirane content, ERSO) was prepared by treating the oil with peracetic acid generated in situ by reacting glacial acetic acid with hydrogen peroxide. The thermal behavior of the ERSO was ... -
Optical and surface properties of zinc oxide nanoparticles dried by conventional and supercritical ethanol drying techniques
Egbuchunam, Theresa Obuajulu; Yetgin, Senem; Özmıhçı Ömürlü, Filiz; Balköse, Devrim (Research India Publications, 2014)Zinc oxide (ZnO) nanoparticles were synthesized by conventional (ZnO-A) and supercritical ethanol drying (ZnO-B). Nitrogen adsorption/desorption analyses were performed to determine the surface areas of the powders. The ... -
Preparation and characterization of magnesium stearate, cobalt stearate, and copper stearate and their effects on poly(vinyl chloride) dehydrochlorination
Gönen, Mehmet; Egbuchunam, Theresa Obuajulu; Balköse, Devrim; İnal, Fikret; Ülkü, Semra (Wiley, 2015-12)Preparation and characterization of pure metal soaps and investigation of their effects on poly(vinyl chloride) (PVC) dehydrochlorination were the objectives of the present study. Magnesium stearate (MgSt2), cobalt stearate ... -
Stabilizing effect of biobased additives on the thermal degradation of PVC
Egbuchunam, Theresa Obuajulu; Okieimen, Felix Ebhodaghe; Balköse, Devrim (Trans Tech Publications, 2010)Novel biobased additives prepared from rubber seed oil were evaluated as thermal stabilizer for PVC. Divalent metal (barium and cadmium) soaps of rubber seed oil were prepared by metathesis in aqueous alcohol and characterized ... -
Studies in the utilization of biobased additives as thermal stabilizer for plasticized PVC
Okieimen, Felix Ebhodaghe; Egbuchunam, Theresa Obuajulu; Balköse, Devrim (Trans Tech Publications, 2009)Divalent metal (barium, cadmium, calcium and zinc) soaps of rubber seed oil and their binary mixtures (BaJCd and CaJZn) and epoxidized rubber seed oil (4.5% epoxide content) and its admixtures with the single divalent metal ... -
Thermal behaviour of metal soaps from biodegradable rubber seed oil
Balköse, Devrim; Egbuchunam, Theresa Obuajulu; Okieimen, Felix Ebhodaghe (Springer, 2010-08)Soaps are a class of surface active compounds derived from natural oils and fats. Double decomposition reactions permit the synthesis of metallic soaps, which are long-chain carboxylates of metal ions, from alkaline ones ...
