Polycondensation of Tetrahydrofuran with Phthalic Anhydride Induced By a Proton Exchanged Montmorillonite Clay

Ferrahi, Mohammed Issam; Belbachir, Mohammed

doi:10.3390/i4060312

Cited by 25 publications

(20 citation statements)

References 11 publications

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“…Montmorillonites, a class of inexpensive and noncorrosive solid acids, have been used as efficient catalysts for a variety of organic reactions. The reactions catalyzed by montmorillonites are usually carried out under mild conditions with high yields and high selectivities, and the workup of these reactions is very simple; only filtration to remove the catalyst and evaporation of the solvent are required, maghnite-H + can be easily recovered and reused, after it has separated from the polymer, it was rinsed with water and dried by heating to a temperature above 100 °C and finally crushed [19,20]. To ensure good performance, the Maghnite-H + can be reactivated with acid [21,22].…”

Section: Introductionmentioning

confidence: 99%

Cationic Ring Opening polymerization of ε-caprolactam by a Montmorillonite Clay Catalyst

Kherroub

Belbachir

Lamouri

2014

Bull. Chem. React. Eng. Catal.

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The ring opening bulk polymerization of ε-caprolactam catalyzed by Maghnite-H + was reported. Maghnite-H + is a montmorillonite silicate sheet clay was prepared through a straight forward proton exchange process. The effect of the amount of catalyst, and temperature was studied. Increasing Maghnite-H + proportion and temperature produced the increase in ε-caprolactam conversion. The kinetics indicated that the polymerization rate is first order with respect to monomer concentration. Mechanism studies showed that monomer inserted into the growing chains with the acyl-oxygen bond scission rather than the break of alkyl-nitrogen bond.

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Section: Introductionmentioning

confidence: 99%

Cationic Ring Opening polymerization of ε-caprolactam by a Montmorillonite Clay Catalyst

Kherroub

Belbachir

Lamouri

2014

Bull. Chem. React. Eng. Catal.

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“…Montmorillonite catalysts are easily recovered and reused [2][3][4][5][6][7][8]. In continuation of our studies on environmentally bening methods using solid supports, we report that acid-exchanged montmorillonite (Mag-H + ) is a novel, efficient solid catalyst for the synthesis of cyclic polyesters from ringchain reaction of poly(oxypropylene oxymaloyl) ' Figure 1'.…”

Section: Introductionmentioning

confidence: 86%

Cyclic polyesters prepared by poly(oxypropylene oxymaloyl) ring-chain reactions

Ferrahi¹,

Belbachir²

2007

Express Polym. Lett.

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Abstract. The synthesis of cyclic polyesters of poly(oxypropylene oxymaloyl) from a ring-chain reaction was carried out at 40°C with 'Maghnite' an acid exchanged montmorillonite as acid solid ecocatalyst (Mag-H + ). 'Maghnite' is already used as catalyst for polymerization of many vinylic and heterocyclic monomers [1]. The effect of amount of catalyst on yield and molecular weight of polymer was studied. A typical reaction product was analyzed by gel permeation chromatography (GPC) as well as by nuclear magnetic resonance spectroscopy ( 1 H-NMR) and the existence of cyclic species was proven.

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“…The purpose of this paper is to study the copolymerization of DXL with Styrene, catalyzed by Maghnite-H + a proton exchanged Montmorillonite clay 7 . The effects of the amounts of the Maghnite-H + on the synthesis of poly (DXL-co-Styrene) are also discussed.…”

Section: Introductionmentioning

confidence: 99%

“…Several polymers, for example, polystyrene (PS) 5 , and polystyrene-block-polyisoprene-block-polystyrene 6 ,an Algerian proton exchanged montmorillonite clay called Maghnite-H+ (Mag-H+), a new nontoxic cationic initiator, was used as a catalyst for cationic polymerization of a number of vinylic and heterocyclic monomers [7][8] .…”

Section: Introductionmentioning

confidence: 99%

Cationic Ring Opening Copolymerization of 1,3-Dioxolane with Styrene by Montmorillonite Maghnite-H+ Catalyst

Hamam¹,

Ferrahi²,

Belbachir³

2016

Orient. J. Chem

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In the present work, the copolymerization of 1,3-Dioxolane (DXL) with Styrene (St) catalyzed by Maghnite-H+ a montmorillonite sheet silicate clay exchanged with protons, was investigated. The cationic ring opening polymerization was initiated by Maghnite-H+ in bulk. The copolymer obtained was characterized by 1H-NMR, DSC and IR spectroscopy. The studies done, such as the effect of the amount of catalyser on the syntheses of poly (DXL -co-Styrene).

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Polycondensation of Tetrahydrofuran with Phthalic Anhydride Induced By a Proton Exchanged Montmorillonite Clay

Cited by 25 publications

References 11 publications

Cationic Ring Opening polymerization of ε-caprolactam by a Montmorillonite Clay Catalyst

Cationic Ring Opening polymerization of ε-caprolactam by a Montmorillonite Clay Catalyst

Cyclic polyesters prepared by poly(oxypropylene oxymaloyl) ring-chain reactions

Cationic Ring Opening Copolymerization of 1,3-Dioxolane with Styrene by Montmorillonite Maghnite-H+ Catalyst

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