Photoinduced Iron‐Based Water‐Induced Phase Separable Catalysis (WPSC) ICAR ATRP of Poly(ethylene glycol) Methyl Ether Methacrylate

Wu, Jian; Zhang, Bingjie; Zhang, Lifen; Cheng, Zhenping; Zhu, Xiulin

doi:10.1002/marc.201700116

Cited by 9 publications

(8 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cooling the final solution results in the separation of the polymer from the catalyst/ionic liquid layer . Moreover, in water‐induced phase separable catalysis (WPSC) as little as 10 vol% water was added to induce phase separation between the hydrophilic polymer and the solvents mixture containing the copper complex …”

Section: Removal Of Atrp Catalystsmentioning

confidence: 99%

Atom Transfer Radical Polymerization: Billion Times More Active Catalysts and New Initiation Systems

Ribelli

Lorandi

Fantin

et al. 2018

Macromol. Rapid Commun.

235

184

View full text Add to dashboard Cite

polymerizing styrene in the presence of 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) radicals. [10] Later, Wayland et al. used a cobalt(II) porphyrin complex to reversibly trap radical species during the polymerization of acrylate monomers, which showed living features: i) linear increase of polymer MW with monomer conversion, and ii) narrow MWD. [11] These techniques set the basis for the development of nitroxide-mediated polymerization (NMP) [12,13] and organometallic mediated radical polymerization (OMRP). [14][15][16] Within the past three decades, controlled radical polymerization (CRP) has been established as a new field in polymer chemistry, in which exceptional control was achieved over polymer architectures, thus enabling the preparation of commercially relevant polymer-based materials for advanced applications. Following IUPAC recommendations, CRP should be termed as reversible deactivation radical polymerization (RDRP). [17] Besides the aforementioned NMP and OMRP, the most affirmed RDRPs are atom transfer radical polymerization (ATRP) [18][19][20] and reversible additionfragmentation chain transfer (RAFT) polymerization. [21] RDRP ensures comparable degree of control as living ionic polymerization, while retaining the versatility and the scope of conventional radical polymerization. The fraction of terminated chains in RDRP is small, typically below a few mol%. Polymers and copolymers prepared by RDRP methods can have defined topologies (stars, brushes, networks, combs), compositions (block, gradient, graft, alternate) and chain-end functionalities. [22] This review will focus on ATRP, with particular attention to the design and application of progressively more active and selective copper-based catalysts, and the development of novel, more benign initiation systems. The correlation between the structure of Cu complexes and their catalytic activity will be discussed in detail, also taking into account the effect of solvent and, when present, surfactants and other additives. Mechanisms of Reversible Deactivation Radical Polymerization ProcessesThe core of all RDRP systems is the increase of chain lifetime by reversibly deactivating the propagating radical species, thus forming dormant species that can be subsequently reactivated. As opposed to conventional RP in which the 25 Years of ATRP Approaching 25 years since its invention, atom transfer radical polymerization (ATRP) is established as a powerful technique to prepare precisely defined polymeric materials. This perspective focuses on the relation between structure and activity of ATRP catalysts, and the consequent choice of the initiating system, which are paramount aspects to well-controlled polymerizations. The ATRP mechanism is discussed, including the effect of kinetic and thermodynamic parameters and side reactions affecting the catalyst. The coordination chemistry and activity of copper complexes used in ATRP are reviewed in chronological order, while emphasizing the structure-activity correlation. ATRP-initiating systems are described, from ...

show abstract

Section: Removal Of Atrp Catalystsmentioning

confidence: 99%

Atom Transfer Radical Polymerization: Billion Times More Active Catalysts and New Initiation Systems

Ribelli

Lorandi

Fantin

et al. 2018

Macromol. Rapid Commun.

235

184

View full text Add to dashboard Cite

show abstract

“…Biphasic catalyst systems were further improved through the development of thermoregulated phasetransfer catalysts (TRPTCs), [244] thermoregulated phase separable catalysts (TPSCs), [245] or water-induced phase separable catalysts (WPSCs). [246] TRPTCs exploit the insolubility at low temperature of employed catalysts, which can include fluorinated ligands [247] or PEG-supported pyridyl ligands. [248] On the contrary, in TPSCs, the copper catalyst is initially in the ionic liquid phase, which is immiscible with the monomer at room temperature.…”

Section: Heterogeneous Catalysismentioning

confidence: 99%

Toward Green Atom Transfer Radical Polymerization: Current Status and Future Challenges

et al. 2022

View full text Add to dashboard Cite

Dedicated to Professor Klaus Muellen on the occasion of his 75th birthdayReversible-deactivation radical polymerizations (RDRPs) have revolutionized synthetic polymer chemistry. Nowadays, RDRPs facilitate design and preparation of materials with controlled architecture, composition, and functionality. Atom transfer radical polymerization (ATRP) has evolved beyond traditional polymer field, enabling synthesis of organic-inorganic hybrids, bioconjugates, advanced polymers for electronics, energy, and environmentally relevant polymeric materials for broad applications in various fields. This review focuses on the relation between ATRP technology and the 12 principles of green chemistry, which are paramount guidelines in sustainable research and implementation. The green features of ATRP are presented, discussing the environmental and/or health issues and the challenges that remain to be overcome. Key discoveries and recent developments in green ATRP are highlighted, while providing a perspective for future opportunities in this area.

show abstract

“…However, the Cu I /ligand catalyst system is insoluble in some organic solvents and is also vulnerable to be oxidized, which make a barrier for application of the normal ATRP in PISA. Recently, ATRP techniques employing the Cu II /ligand catalyst, typically initiators for continuous activator regeneration (ICAR) ATRP, have been achieved. In comparison, the Cu II /ligand catalyst is stable under atmosphere conditions and is soluble in most of polar solvents, which therefore affords great convenience in synthesis of block copolymer nanoassemblies when they are adopted in PISA.…”

Section: Introductionmentioning

confidence: 99%

ICAR ATRP in PEG with Low Concentration of Cu(II) Catalyst: A Versatile Method for Synthesis of Block Copolymer Nanoassemblies under Dispersion Polymerization

Wang

Han

Duan

et al. 2018

Macromol. Rapid Commun.

View full text Add to dashboard Cite

A versatile method for synthesis of block copolymer nanoassemblies via initiators for continuous activator regeneration (ICAR) atom transfer radical polymerization (ATRP) dispersion polymerization in a low molecular weight poly(ethylene glycol) (PEG) is discussed. This ICAR ATRP dispersion polymerization uses a low concentration of CuBr catalyst, which is stable under atmospheric conditions and is soluble in most polar solvents and employs a polymerization medium of viscous and nonvolatile PEG. Through this ICAR ATRP dispersion polymerization, various block copolymer nanoassemblies, including poly(ethylene glycol)-block-polystyrene, poly(ethylene glycol)-block-poly(methyl methacrylate), and poly(2-hydroxypropyl methacrylate)-block-poly(methyl methacrylate), have been synthesized. The parameters affecting the size and morphology of the block copolymer nanoassemblies are briefly discussed.

show abstract

Photoinduced Iron‐Based Water‐Induced Phase Separable Catalysis (WPSC) ICAR ATRP of Poly(ethylene glycol) Methyl Ether Methacrylate

Cited by 9 publications

References 42 publications

Atom Transfer Radical Polymerization: Billion Times More Active Catalysts and New Initiation Systems

Atom Transfer Radical Polymerization: Billion Times More Active Catalysts and New Initiation Systems

Toward Green Atom Transfer Radical Polymerization: Current Status and Future Challenges

ICAR ATRP in PEG with Low Concentration of Cu(II) Catalyst: A Versatile Method for Synthesis of Block Copolymer Nanoassemblies under Dispersion Polymerization

Contact Info

Product

Resources

About