Synthesis of Cyclic Polyesters of Poly(Oxybutylene Oxymaleoyl)

Ferrahi, Mohammed Issam; Belbachir, Mohammed

doi:10.1007/s10965-004-1864-0

Cited by 10 publications

(10 citation statements)

References 16 publications

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“…[31]. In the polymerization of Epichlorohydrin, and Ferrahi et al [32][33] in propylene oxide and cyclohexene oxide by Mag-H + and the polymerization of styrene by Montmorillonite, respectively. This phenomenon is probably the result of the number of 'initiating active sites' responsible of inducing polymerization, this number is prorating to the catalyst amount used in reaction…”

Section: Procedures and Product Characterizationmentioning

confidence: 98%

A new strategy for synthesis of microspheres amphiphilic block copolymer based on Epichlorohydrin and N-viny-2-pyrrolidone induced by an ecologic clay catalyst called Maghnite-H+ (Algerian MMT)

Rahmouni

Djelloul²,

Issam³

et al. 2013

International Journal of Scientific World

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Biodegradable copolymer microsphere poly (ECH-co-NVP) was synthesized by a ring-opening polymerization process of Epichlorohydrin and N-vinyl-2-pyrrolidone.The copolymerization of Epichlorohydrin (ECH) and N-vinyl-2-pyrrolidone (NVP) catalyzed by Maghnite-H + (Mag-H + ) was investigated. The effect of some factors such as the amount of the catalyst (Maghnite-H + ) and the temperature of reaction. It was found that the copolymerization rate increased with increase in the temperature and the proportion of catalyst, and it was larger in nonpolar solvents. The product was characterized by various technic characterizations such as FTIR and 1H-NMR.

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Section: Procedures and Product Characterizationmentioning

confidence: 98%

A new strategy for synthesis of microspheres amphiphilic block copolymer based on Epichlorohydrin and N-viny-2-pyrrolidone induced by an ecologic clay catalyst called Maghnite-H+ (Algerian MMT)

Rahmouni

Djelloul²,

Issam³

et al. 2013

International Journal of Scientific World

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“…The different applications of the activated-clay depend on their specific adsorption properties, the ion exchange and the surface nature [7]. Due to these qualities, clay is used in different field, like in medical and pharmaceutical industries, organic molecule polymerization [8] and pollutant retention such as pesticides, organic, inorganic compounds, heavy metals [9-10-11]. The removal of methyl orange from wastewater needs great attention.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of acid dye onto activated Algerian clay

Djelloul¹,

Driss²,

BASSOU³

2017

Bull. Chem. Soc. Eth.

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ABSTRACT. In this work, activated clay from Algeria was used as adsorbent for the removal of methyl orange (MO) from aqueous solution, for this, the effects of several parameters such as contact time, adsorbent dose, pH value of aqueous solution and temperature on the adsorption of MO were also studied. The results showed that nearly 30 min of contact time are found to be sufficient for the adsorption to reach equilibrium and the adsorption was favourable at lower pH. The acid dye concentration is measured with UV-visible spectrophotometer at a wavelength of 464 nm. The adsorption capacity of MO found to be 32.57 mg/g. The Pseudo-first-order and pseudo-second-order models were used to fit the experimental data. The adsorption kinetic process was found to follow a pseudo second order model.The Langmuir and Freundlich isotherms models were used to describe adsorption data, the results indicates that Langmuir and Freundlich models provide better correlation of the experimental data. The negative values of ΔG° at different temperatures show that the adsorption process is spontaneous. The values of ΔH and ΔS were found to be 1.04 kJ/mol and 3.35 J/mol.K, respectively. The positive value of ΔH confirms that the adsorption is endothermic and the adsorption process is chemical nature.

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“…The different applications of the clay depend on their specific adsorption properties, the ion exchange and the surface nature [8]. Due to these qualities, clay is used in different field, like in medical and pharmaceutical industries, organic molecule polymerization [9,10], and pollutant retention such as pesticides, organic, inorganic compounds, heavy metals [11].…”

Section: Introductionmentioning

confidence: 99%