Cationic polymerization of poly(α-methylstyrene-block-isobutyl vinyl ether) using Maghnite-H+ clay (Algerian MMT) as catalyst

Ayat, Moulkheir; Belbachir, Mohammed; Rahmouni, Abdelkader

doi:10.1007/s00289-018-2328-8

Cited by 5 publications

(4 citation statements)

References 39 publications

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“…63 In 2018, the same group utilized Maghnite-H + as an initiator to synthesize a novel copolymer, poly(α-MS-b-IBVE), through a bulk cationic polymerization reaction. 64 In conclusion, we have found that Maghnite-H + , a proton exchanged montmorillonite clay, is effective an acidic as initiator, which is a chemically and thermally stable initiator having a proper mechanical resistance and nontoxic for the copolymerization of α-MS with IBVE. The copolymerization proceeds smoothly, and a simple filtration is sufficient to recover the initiator.…”

Section: Maghnite-h + Novel Solid Initiator Systemmentioning

confidence: 78%

“…The initiator activity and polymer viscosity were found to be dependent on the initiator‐to‐monomer ratio, solvent, and reaction time 63 . In 2018, the same group utilized Maghnite‐H + as an initiator to synthesize a novel copolymer, poly( α ‐MS‐ b ‐IBVE), through a bulk cationic polymerization reaction 64 . In conclusion, we have found that Maghnite‐H + , a proton exchanged montmorillonite clay, is effective an acidic as initiator, which is a chemically and thermally stable initiator having a proper mechanical resistance and non‐toxic for the copolymerization of α ‐MS with IBVE.…”

Section: Green Initiation System For Cationic Polymerizationmentioning

confidence: 99%

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Recent advances in green cationic polymerization

Zhu,

Yu,

Liu

et al. 2024

Journal of Polymer Science

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Traditional living/controlled cationic polymerization provides a simple synthetic route for the preparation of various polymers with set molecular weight, narrow molecular weight distribution, and clear structure. Nowadays, under the requirements of sustainable development, it is very important to explore the green chemical technology in depth. This review offers an overview of initiation systems, reaction media, polymerization techniques, and monomers, with the aim of summarizing environmentally friendly methods utilized in the field of cationic polymerization over the past 15 years. It covers a variety of directions from traditional initiation systems to green initiators, from corrosive solvents to environmentally friendly solvents, from drop initiation to external stimulation initiation, from petroleum fractionated monomers to bio‐based monomers. These methods and Techniques aim to develop advanced high‐quality polymer products using cationic polymerization, and achieving efficient energy savings and reducing emissions. The ongoing exploration of green‐controlled cationic polymerization holds promise for opening up new avenues and novel technology for high‐performance polyolefin materials.

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Section: Maghnite-h + Novel Solid Initiator Systemmentioning

confidence: 78%

Section: Green Initiation System For Cationic Polymerizationmentioning

confidence: 99%

Recent advances in green cationic polymerization

Zhu,

Yu,

Liu

et al. 2024

Journal of Polymer Science

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“…1 H NMR spectra of CTFE-IBVE 2 , CTFE-IBVE 2 -DFMA 5 , and CTFE-IBVE 2 -DFMA 5 -EGMAE polymers are shown in Figure , and the chemical shifts δ = 3.51 ppm (−CHO-, H, a), δ = 3.43 ppm (−OCH 2 –, 2H, b), δ = 1.72–1.95 ppm (−CCHC-, H, c), and δ = 0.90 ppm (−CCH 3 -, 3H, d) are attributed to the structure of IBVE . The chemical shifts δ = 0.88–0.92 ppm (−CCH 3 –, 3H, e) and δ = 5.4–5.5 ppm (−CHF–, H, f) are attributed to the structure of DFMA .…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 1b, the characteristic absorption peak of CF 3 in , 3H, d) are attributed to the structure of IBVE. 20 The chemical shifts δ = 0.88−0.92 ppm (−CCH 3 −, 3H, e) and δ = 5.4−5.5 ppm (−CHF−, H, f) are attributed to the structure of DFMA. 21 The chemical shift δ = 3.66−3.76 ppm (−CCH 2 O−, 2H, g) is assigned to the structure of EGMAE.…”

Section: Characterizationmentioning

confidence: 97%

Influence of Pendant Fluoroalkyl Segments on Properties of Fluoroethylene and Vinyl Ether Polymers and Their Hydrophobic Coatings

Ma,

Li,

et al. 2024

ACS Appl. Polym. Mater.

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Hydrophobic coatings that repel corrosive media are more conducive to protecting metals from corrosion. Fluorocarbon resins with a low surface energy are the most ideal materials for preparing hydrophobic surfaces. In this paper, dodecafluoroheptyl methacrylate (DFMA) with rich −CF3 group was introduced into the copolymer of chlorotrifluoroethylene (CTFE) and isobutyl vinyl ether (IBVE) to prepare a series of fluoroethylene and vinyl ether (FEVE) polymers. The high fluorine content of 33.87–43.68 wt % was obtained for FEVE polymers due to the instruction of DFMA containing many fluorine atoms in the side chain. Subsequently, an ethylene glycol monoallyl ether (EGMAE) monomer was introduced for cross-linking with isocyanate. Then, the FEVE polymers were made into varnish coatings. The influence of pendant fluoroalkyl segments of the polymers on the wettability, mechanical properties, and acid and alkali resistance of the coatings was evaluated. The results indicated that the water contact angle (WCA) of the varnish coatings can reach 104.5° and the surface energy of coating decreased to 17.05 mN·m–1 by introducing 0.5 mol of DFMA monomer in the CTFE-IBVE system. Its cross-linked coating can withstand acidic and alkali liquids for up to 30 days, showing excellent chemical stability. In addition, the cross-linked FEVE coatings can reach superhydrophobicity (WCA = 151.5 ± 0.5°, SA = 8 ± 0.8°) by adding only 18 wt % unmodified nano SiO2.

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