Synthesis and Characterization of Poly(α-Methylstyrene) by Cationic Polymerization Using a New Solid Ecological Catalyst

Ayat, Moulkheir; Bensaada, Naima; Belbachir, Mohammed; Harrane, Amine; Méghabar, Rachid

doi:10.13005/ojc/310432

Cited by 9 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We can see also in Table 3, the molecular weight are proportional to the amount of Na + -MMT. Similar results are obtained by Ayat et al [46] and Harrane et al [63], in the polymerization of α-methyl styrene; diblock copolymers of glycolide and poly(oxyethylene) using a Mag-H + as catalyst, respectively.…”

Section: Effect Of the Amount Of Mmt-na + On Copolymerizationsupporting

confidence: 87%

“…This study is also concerned with polymerization and examines the catalytic activity of an Algerian sodiums-exchanged montmorillonite clay called ″Na + -MMT″ via cationic copolymerization of methyl methacrylate (MMA) and α-MethylStyrene (AMS). The structure and the composition of the catalyst were reported in previous works [44][45][46].…”

Section: Resultsmentioning

confidence: 99%

“…The signals at 1.8 corresponding, to methylene protons of PAMS units, a new strong peak at 3.7 ppm appears, This signal is attributed to the protons of the methyl of the ester group in the homosequences of PMMA units, it indicated, that the copolymer P (MMA-b-AMS) was synthesized [65,67]. The presence of PAMS [46] chains causes termination step and lead to the [46] reacts with propagating PMMA chain and produces PAMS/PMMA diblock copolymer (Scheme 1). The same results are obtained in the copolymerization of MMA and Styrene, using different catalysts [65,67].…”

Section: Nmr Studymentioning

confidence: 91%

“…There is, to date, no information on the polymerization of MMA with Na + -MMT catalyst. In continuation of our studies on environmentally benign methods using solid supports, we report for the first time and present a new approach to synthesis of poly(AMS/MMA) via cationic polymerization using a Na + -MMT [44][45][46]. In our previous papers, we already reported about polymerization catalyzed by "Na + -MMT", this new nontoxic cationic catalyst exhibited higher efficiency via the polymerization of vinylic and hetero-cyclic monomers [47][48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

“…The interesting aspect of this new non-toxic catalyst is the environmentally friendly nature of the reaction because it does not imply the disposal of solvents or metal catalysts. This catalyst can be easily separated from the copolymer product and regenerated by heating at a temperature above 100 °C [44][45][46]. The effects of different synthesis parameters such as the amount of Na + -MMT, comonomer AMS, and eventually the mechanism are discussed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Methyl Methacrylate and Alpha-Methyl Styrene: New Strategy for Synthesis of Bloc Copolymers for Use in Potential Biomedical Applications Generated by an Ecologic Catalyst Called Maghnite (Algerian MMT)

Ayat

Belbachir

Rahmouni

2016

Bull. Chem. React. Eng. Catal.

Self Cite

View full text Add to dashboard Cite

A new model for synthesis of the plastics, block copolymers were prepared from methyl methacrylate (MMA) and alpha-methyl styrene (α-MS) by cationic copolymerization in the presence of a new and efficient catalyst of "Maghnite-Na" at 0 °C in bulk. In this paper, the copolymerization of α-MS and MMA was induced in heterogeneous phase catalyzed by Maghnite-Na was investigated under suitable conditions. The "Maghnite-Na" is a montmorillonite sheet silicate clay, with exchanged sodium cations to produce Na-Montmorillonite (Na + -MMT) obtained from Tlemcen, Algeria, was investigated to remove heavy metal ion from wastewater as an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers. The synthesized copolymer were characterized by Nuclear Magnetic Resonance (NMR-1 H, NMR-13 C), FT-IR spectroscopy, Differential Scanning Calorimetry (DSC), and Gel Permeation Chromatography (GPC) to elucidate structural characteristics and thermal properties of the resulting copolymers. The structure compositions of "MMT", "H + -MMT" and "Na + -MMT" have been developed. The effect of the MMA/α-MS molar ratio on the rate of copolymerization, the amount of catalyst, temperature and time of copolymerization on yield of copolymers was studied. The yield of copolymerization depends on the amount of Na + -MMT used and the reaction time. The kinetic studies indicated that the polymerization rate is first order with respect to monomer concentration. A possible mechanism of this cationic polymerization is discussed based on the results of the 1 H-NMR Spectroscopic analysis of these model reactions. A cationic mechanism for the reaction studies showed that monomer was inserted into the growing chains.

show abstract

Section: Effect Of the Amount Of Mmt-na + On Copolymerizationsupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%