Mechanism of Polymerization of MMA by Grignard Reagents and Preparation of Highly Isotactic PMMA with Narrow Molecular Weight Distribution

Hatäda, Koichi; Ute, Koichi; Tanaka, Kohji; Kitayama, Tatsuki

doi:10.1007/978-94-009-3175-6_14

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…In general, the anionic polymerization like in other vinyl polymerization methods consists of three main reactions: (a) initiation, (b) propagation, and (c) termination, as described in Figure 13. However, termination is brought about intentionally using a suitable electrophile, which can be useful for end group modification [45]. The initiation reaction is generally fast and is not reflected in the overall rate of the polymerization [46].…”

Section: Resultsmentioning

confidence: 99%

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Rahmouni

Belbachir

Ayat

2017

Bull. Chem. React. Eng. Catal.

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Intercalation of acrylamide into interlayer spaces of natural montmorillonite called maghnite (Algerian MMT) by the free solvent polymerization technique under micowave irradiation was studied. The transformation was carried out with using both the raw (Maghnite-Na fin) and treated clay (Maghnite-Na+ fin) in aqueous sodium hydroxide NaOH solution (1 M). It was shown that no initial modification of the layered mineral (by ion-exchange with Na+ cations or organophilization) is needed for the successful introduction of anionic hydrogels into the interlayer gallery. The goal of the present study was to synthesis anionic polyacrylamide/Maghnite composite with similar composition and structure to that synthesized of other catalyst. The Maghnite catalyst has a significant role in the industrial scale. In fact, the use of Maghnite is preferred for its many advantages: a very low purchase price compared to other catalysts, the easy removal of the reaction mixture. The anionic sodium-clay polyacrylamide material exhibited a tendency to the formation of exfoliated structure. The synthesized hydrogels, as monitored by the swelling behavior, were characterized by Fourier transform infrared and 1HNMR analysis. Copyright © 2018 BCREC Group. All rights reservedReceived: 24th June 2017; Revised: 13rd December 2017; Accepted: 14th December 2017; Available online: 11st June 2018; Published regularly: 1st August 2018How to Cite: Rahmouni, R., Belbachir, M., Ayat, M. (2018). Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 262-274 (doi:10.9767/bcrec.13.2.1308.262-274)

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Section: Resultsmentioning

confidence: 99%

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Rahmouni

Belbachir

Ayat

2017

Bull. Chem. React. Eng. Catal.

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“…The initiation reaction is generally fast and is not reflected in the overall rate of the polymerization [57]. The kinetics of the polymerization is predominantly controlled by the propagation step [58].…”

Section: Proposed Mechanismmentioning

confidence: 99%

Synthesis and Characterization of Polymeric Material Consisting on Acrylamide Catalyzed by Maghnite (Algerian MMT) under Microwave Irradiation

Rahmouni¹,

Belbachir²

2019

Characterizations of Some Composite Materials

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Intercalation of acrylamide into interlayer spaces of natural montmorillonite called maghnite (Algerian MMT) by the free solvent polymerization technique under microwave irradiation was studied. The transformation was carried out with using both the raw (maghnite-Na fin) and treated clay (maghnite-Na + fin) in aqueous sodium hydroxide NaOH solution (1 M). It was shown that no initial modification of the layered mineral (by ion-exchange with Na + cations or organophilization) is needed for the successful introduction of anionic hydrogels into the interlayer gallery. The goal of the present study was to synthesis anionic polyacrylamide/maghnite composite with similar composition and structure to that synthesized of other catalyst. Maghnite catalyst has a significant role in the industrial scale. In fact, the use of maghnite is preferred for its many advantages: a very low purchase price compared to other catalysts, the easy removal of the reaction mixture. The anionic sodium-clay polyacrylamide material exhibited a tendency to the formation of exfoliated structure. The synthesized hydrogels, as monitored by the swelling behavior were characterized by Fourier transform infrared and 1 HNMR analysis.

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Section: Proposed Mechanismmentioning

confidence: 99%

Characterizations of Some Composite Materials

Saleh¹,

Koller²

2019

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The conclusions of direct numerical simulation obtained earlier, within the cluster quantumchemical approximation, are used in experimental investigations of polydimethylsiloxane composites with schungit or silica. The surface structure of these composites by atomic force and scanning electron microscopy was studied. Correlation of the distribution of micro-and nanodimensional fillers in the polymer matrix with the physical-mechanical properties of the composites was established.

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Mechanism of Polymerization of MMA by Grignard Reagents and Preparation of Highly Isotactic PMMA with Narrow Molecular Weight Distribution

Cited by 6 publications

References 28 publications

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Structural Investigation: Anionic Polymerization of Acrylamide under Microwave Irradiation using Maghnite-Na+ Clay (Algerien MMT) as Initiator

Synthesis and Characterization of Polymeric Material Consisting on Acrylamide Catalyzed by Maghnite (Algerian MMT) under Microwave Irradiation

Characterizations of Some Composite Materials

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