Anionic Polymerization - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Anionic Polymerization

The Experts below are selected from a list of 270 Experts worldwide ranked by ideXlab platform

Anionic Polymerization – Free Register to Access Experts & Abstracts

Akira Hirao – One of the best experts on this subject based on the ideXlab platform.

  • Living Anionic Polymerization of 1,4-divinylbenzene and its derivatives
    Reactive and Functional Polymers, 2018
    Co-Authors: Raita Goseki, Takashi Ishizone, Shunsuke Tanaka, Akira Hirao
    Abstract:

    Abstract The living Anionic Polymerization of 1,4-divinylbenzene and its derivatives was reviewed. With the use of a specially-designed initiator system prepared from oligo(α-methylstyryl) lithium and potassium tert-butoxide, the living Anionic Polymerization of 1,4-divinylbenzene was successfully realized for the first time. During this Polymerization, one of the two vinyl groups was selectively polymerized in a living manner, while the other vinyl group remained completely intact in the main chain. Soluble linear polymers with well-controlled molecular weights up to 60.5 kg mol−1 and narrow molecular weight distributions (Mw/Mn

  • Anionic Polymerization : principles, practice, strength, consequences and applications
    , 2015
    Co-Authors: Nikos Hadjichristidis, Akira Hirao
    Abstract:

    Schlenk Techniques for Anionic Polymerization.- High Vacuum Techniques for Anionic Polymerization.- Non-Polar Monomers: Styrene and 1,3-Butadiene Derivatives.- Anionic Polymerization of Polar Vinyl Monomers: Vinylpyridines, (Meth)acrylates, (Meth)acrylamides, (Meth)acrylonitrile, Phenyl Vinyl Sulfoxide, Benzofulvene and Other Monomers.- Cyclic Monomers: Epoxides, Lactide, Lactones, Lactams, Cyclic Silicon-containing monomers, Cyclic Carbonates and others.- Ring-opening Polymerization of N-carboxyanhydrides for preparation of polypeptides and polypeptide-based hybrid materials with various molecular architectures.- Living Anionic Polymerization of Isocyanates.- Poly(ferrocenylsilanes) with controlled macromolecular architecture by Anionic Polymerization: Applications in patterning and lithography.- Polymerization Using Phosphazene Bases.- Group Transfer Polymerization of Acrylic Monomers.- Surface Initiated Anionic Polymerization from Nanomaterials.- Block Copolymers by Anionic Polymerization: Recent Synthetic Routes and Developments.- Graft and Comblike Polymers.- Star-Branched Polymers (Star Polymers).- Synthesis of Dendrimer-like Polymers.- Complex Branched Polymers.- Block Copolymers Containing Polythiophene Segments.- Block Copolymers and Miktoarm Star-Branched Polymers.- Control of Surface Structure and Dynamics of Polymers Based on Precision Synthesis.- Block Copolymers as Anti-fouling and Fouling Resistant Coatings.- Micellar Structures from Anionically Synthesized Block Copolymers.- Block Copolymers for Self-assembling Lithographic Materials.- Methacrylate-Based Polymers for Industrial Uses.- The Critical Role of Anionic Polymerization for Advances in the Physics of Polyolefins.- Future Remarks.

  • Materials Science and Technology – Anionic Polymerization: Recent Advances
    Materials Science and Technology, 2012
    Co-Authors: Takashi Ishizone, Akira Hirao
    Abstract:

    The sections in this article are Background Living Anionic Polymerization of Various Monomers Styrene Derivatives 1,3-Diene Monomers 2- and 4-Vinylpyridines (Meth)acrylate Derivatives Acrylamide Derivatives Cyclic Monomers Other Monomers Reaction of Living Anionic Polymers with Electrophiles: Synthesis of Chain-Functionalized Polymers Synthesis of Architectural Polymers via Living Anionic Polymerization Block Copolymers Graft Copolymers Star-Branched Polymers Complex Architectural Polymers Anionic Polymerization: Practical Aspects Concluding Remarks Keywords: Anionic Polymerization; living Anionic Polymerization; styrene; 1,3-butadiene; isoprene; alkyl (meth)acrylates; acrylamides; protective group; functional polymers; architectural polymers; block copolymers; star-branched polymers; dendrimer-like star-branched polymers; molecular weigweight control; narrow molecular weight distribution; stereoregularity; chain-functionalization

Jimmy W. Mays – One of the best experts on this subject based on the ideXlab platform.

  • poly 1 adamantyl acrylate living Anionic Polymerization block coPolymerization and thermal properties
    Macromolecules, 2016
    Co-Authors: Wei Lu, Kunlun Hong, Caili Huang, Nam-goo Kang, Jimmy W. Mays
    Abstract:

    Living Anionic Polymerization of acrylates is challenging due to intrinsic side reactions including backbiting reactions of propagating enolate anions and aggregation of active chain ends. In this study, the controlled synthesis of poly(1-adamatyl acrylate) (PAdA) was performed successfully for the first time via living Anionic Polymerization through investigation of the initiation systems of sec-butyllithium/diphenylethylene/lithium chloride (sec-BuLi/DPE/LiCl), diphenylmethylpotassium/diethylzinc (DPMK/Et2Zn), and sodium naphthalenide/dipenylethylene/diethylzinc (Na-Naph/DPE/Et2Zn) in tetrahydrofuran at −78 °C using custom glass-blowing and high-vacuum techniques. PAdA synthesized via Anionic Polymerization using DPMK with a large excess (more than 40-fold to DPMK) of Et2Zn as the ligand exhibited predicted molecular weights from 4.3 to 71.8 kg/mol and polydispersity indices of around 1.10. In addition, the produced PAdAs exhibit a low level of isotactic content (mm triads of 2.1%). The block copolymers…

  • Poly(1-adamantyl acrylate): Living Anionic Polymerization, Block CoPolymerization, and Thermal Properties
    , 2016
    Co-Authors: Caili Huang, Kunlun Hong, Nam-goo Kang, Jimmy W. Mays
    Abstract:

    Living Anionic Polymerization of acrylates is challenging due to intrinsic side reactions including backbiting reactions of propagating enolate anions and aggregation of active chain ends. In this study, the controlled synthesis of poly­(1-adamatyl acrylate) (PAdA) was performed successfully for the first time via living Anionic Polymerization through investigation of the initiation systems of sec-butyl­lithium/diphenyl­ethylene/lithium chloride (sec-BuLi/DPE/LiCl), diphenyl­methyl­potassium/diethyl­zinc (DPMK/Et2Zn), and sodium naphthalenide/dipenyl­ethylene/diethylzinc (Na-Naph/DPE/Et2Zn) in tetrahydrofuran at −78 °C using custom glass-blowing and high-vacuum techniques. PAdA synthesized via Anionic Polymerization using DPMK with a large excess (more than 40-fold to DPMK) of Et2Zn as the ligand exhibited predicted molecular weights from 4.3 to 71.8 kg/mol and polydispersity indices of around 1.10. In addition, the produced PAdAs exhibit a low level of isotactic content (mm triads of 2.1%). The block copolymers of AdA and methyl methacrylate (MMA) were obtained by sequential Anionic Polymerization, and the distinct living property of PAdA over other acrylates was demonstrated based on the observation that the resulting PAdA-b-PMMA block copolymers were formed with no residual PAdA homopolymer. The PAdA homopolymers exhibit a very high glass transition temperature (133 °C) and outstanding thermal stability (Td: 376 °C) as compared to other acrylic polymers such as poly­(tert-butyl acrylate) and poly­(methyl acrylate). These merits make PAdA a promising candidate for acrylic-based thermoplastic elastomers with high upper service temperature and enhanced mechanical strength

  • High Vacuum Techniques for Anionic Polymerization
    Anionic Polymerization, 2015
    Co-Authors: Kedar Ratkanthwar, Nikolaos Hadjichristidis, Jimmy W. Mays
    Abstract:

    Anionic Polymerization high vacuum techniques (HVTs) are the most suitable for the preparation of polymer samples with well-defined complex macromolecular architectures. Though HVTs require glassblowing skill for designing and making Polymerization reactor, it is the best way to avoid any termination of living polymers during the number of steps for the synthesis of polymers with complex structure. In this chapter, we describe the different Polymerization reactors and HVTs for the purification of monomers, solvents, and other reagents for Anionic Polymerization as well as few model reactions for the synthesis of polymers with simple to complex structure.

Takashi Ishizone – One of the best experts on this subject based on the ideXlab platform.

  • Living Anionic Polymerization of 1,4-divinylbenzene and its derivatives
    Reactive and Functional Polymers, 2018
    Co-Authors: Raita Goseki, Takashi Ishizone, Shunsuke Tanaka, Akira Hirao
    Abstract:

    Abstract The living Anionic Polymerization of 1,4-divinylbenzene and its derivatives was reviewed. With the use of a specially-designed initiator system prepared from oligo(α-methylstyryl) lithium and potassium tert-butoxide, the living Anionic Polymerization of 1,4-divinylbenzene was successfully realized for the first time. During this Polymerization, one of the two vinyl groups was selectively polymerized in a living manner, while the other vinyl group remained completely intact in the main chain. Soluble linear polymers with well-controlled molecular weights up to 60.5 kg mol−1 and narrow molecular weight distributions (Mw/Mn

  • Materials Science and Technology – Anionic Polymerization: Recent Advances
    Materials Science and Technology, 2012
    Co-Authors: Takashi Ishizone, Akira Hirao
    Abstract:

    The sections in this article are Background Living Anionic Polymerization of Various Monomers Styrene Derivatives 1,3-Diene Monomers 2- and 4-Vinylpyridines (Meth)acrylate Derivatives Acrylamide Derivatives Cyclic Monomers Other Monomers Reaction of Living Anionic Polymers with Electrophiles: Synthesis of Chain-Functionalized Polymers Synthesis of Architectural Polymers via Living Anionic Polymerization Block Copolymers Graft Copolymers Star-Branched Polymers Complex Architectural Polymers Anionic Polymerization: Practical Aspects Concluding Remarks Keywords: Anionic Polymerization; living Anionic Polymerization; styrene; 1,3-butadiene; isoprene; alkyl (meth)acrylates; acrylamides; protective group; functional polymers; architectural polymers; block copolymers; star-branched polymers; dendrimer-like star-branched polymers; molecular weight control; narrow molecular weight distribution; stereoregularity; chain-functionalization

  • Anionic Polymerization of Protected Functional Monomers
    Polymer Science: A Comprehensive Reference, 2012
    Co-Authors: Takashi Ishizone, Kenji Sugiyama, Akira Hirao
    Abstract:

    This chapter reviews the living Anionic Polymerization of protected functional monomers. The functional monomers include styrenes, 1,3-butadienes, alkyl (meth)acrylates, and acrylamide derivatives. A variety of highly useful functional groups, which would normally participate in termination or chain transfer reactions in Anionic Polymerization, are masked by appropriate protective groups prior to Polymerization. The resulting protected functional monomers smoothly undergo Anionic Polymerizations to afford stable ‘living polymers’, similar to those obtained by corresponding nonfunctional monomers. After Polymerization, the protective groups are quantitatively removed to regenerate the original functional groups, yielding well-defined polymers having functional groups in all monomer units as well as precisely controlled molecular weights and narrow molecular weight distributions.

Robert Jérôme – One of the best experts on this subject based on the ideXlab platform.

  • Materials Science and Technology – Anionic Polymerization: Recent Advances
    Materials Science and Technology, 2013
    Co-Authors: Robert Jérôme, Philippe Teyssie
    Abstract:

    The sections in this article are Introduction General Aspects of Anionic Living Polymerization Strategies Group Transfer Polymerization A Discussed Mechanism A Remarkable Macromolecular Architecture Metal-Free Anionic Polymerization Nucleophilic/Coordinative Polymerization Organolanthanides (III)-Initiated Polymerization Metalloporphyrin-Mediated Nucleophilic Polymerizations “Ligated” Anionic Polymerization Ion-Pairs Complexation: Nature of Ligands Effect of Ligands on Thermodynamics Coordination Strength of σ-Chelating Ligands Steric Hindrance around the “Ligated” Ion-Pairs Effect of Ligands on Kinetics Modification of the Association Equilibria Modification of the Solvation Equilibria A Golden Tool for Macromolecular Engineering Conclusions

  • Recent achievements in Anionic Polymerization of (meth)acrylates
    Journal of Polymer Science Part A: Polymer Chemistry, 1999
    Co-Authors: Robert Jérôme, Philippe Teyssie, Bruno Vuillemin, Thomas Zundel, Catherine Zune
    Abstract:

    The constant progress of the Anionic Polymerization of (meth)acrylates is discussed from both the fundamental and practical points of view. A special attention is paid to the improved macromolecular engineering of (meth)acrylate-based (co)polymers. The resulting most important materials and the scaling-up process needed for their production are also emphasized. The recent developments witness for the healthy state of the Anionic Polymerization of these polar monomers. © 1999 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 37: 1–10, 1999

  • Anionic Polymerization of (meth)acrylic monomers: Anionic Polymerization of tert-butyl methacrylate in toluene
    Polymer International, 1999
    Co-Authors: Catherine Zune, Philippe Dubois, Robert Jérôme
    Abstract:

    The Anionic Polymerization of tBMA initiated by an organolithium compound in toluene at low temperature (−78 °C and 0 °C) has been revisited. Under these experimental conditions, no ‘livingness’ is reported, consistently with formation of an important fraction of oligomers (Mn = 650). © 1999 Society of Chemical Industry

Itaru Natori – One of the best experts on this subject based on the ideXlab platform.

  • Synthesis of functionalized fullerene-C60 by the living Anionic Polymerization technique
    Journal of Applied Polymer Science, 2010
    Co-Authors: Itaru Natori, Shizue Natori, Yuto Hirose
    Abstract:

    The synthesis of functionalized fullerene-C 60 (C 60 ) was performed using living Anionic Polymerization. The metalation of the benzylic hydrogen atom on toluene or p-substituted toluene was conducted with the alkyllithium/amine system, and examined by living Anionic Polymerization of 1,3-cyclohexadiene. The number of carbanions bonded onto C 60 was estimated by the grafting reaction of living polymer onto C 60 . The tert-butyllithium/ N,N,N’,N’-tetramethylethylenediamine system was an effective metalation reagent, and toluene-, p-xylene-, 4-methyltriphenylamine-functionalized C 60 s having good solubility were successfully synthesized.

  • Anionic Polymerization of 9-vinylanthracene with the alkyllithium/amine system
    Polymers for Advanced Technologies, 2009
    Co-Authors: Itaru Natori, Shizue Natori
    Abstract:

    The Anionic Polymerization of 9-vinylanthracene (VAN) with the alkyllithium (RLi)/amine system was examined to explore new initiator systems that could polymerize VAN at moderate temperatures in hydrocarbon solvents. Important factors in the Anionic Polymerization of VAN were found to be the high nucleophilicity of the RLi/amine and poly(9-vinylanthracenyl)lithium (PVANLi)/amine systems, the low steric hindrance of the amine molecule, and good solubility of PVANLi during the Polymerization. The t-butyllithium (t-BuLi)/N,N,N’,N’-tetramethylethylenediamine (TMEDA) (1.00/1.25) system achieved the highest PVAN yield in toluene at room temperature (ca. 25°C), although the limitations of yield and the number average molemolecular weight (Mn) were around 90 wt% and 2000, respectively. The results obtained from spectrum analyses suggested that the Anionically polymerized PVAN would be considered a favorable polymer for the preparation of new luminescent materials. Copyright © 2009 John Wiley & Sons, Ltd.

  • Anionic Polymerization of 4 diphenylaminostyrene characteristics of the alkyllithium n n n n tetramethylethylenediamine system for living Anionic Polymerization
    Macromolecules, 2008
    Co-Authors: Itaru Natori, Shizue Natori, Hiroaki Usui, Hisaya Sato
    Abstract:

    A well-controlled Anionic Polymerization of 4-diphenylaminostyrene (DAS) with alkyllithium (RLi) has been achieved for the first time. The nucleophilicity and solubility of RLi, 4-diphenylaminostyryllithium (DASLi), and poly(4-diphenylaminostyryl)lithium (PDASLi) were very important controlling factors. An initiator system of tert-butyllithium (t-BuLi)/N,N,N′,N′-tetramethylethylenediamine (TMEDA) in toluene was found to be very effective. In this system, the t-BuLi/TMEDA complex reacts with toluene to form the benzyllithium (BzLi)/TMEDA complex, and this complex initiates the Anionic Polymerization of DAS. The DASLi/TMEDA and PDASLi/TMEDA complexes have sufficient nucleophilicity and stability as propagating species, without the metalation of toluene, and as a result, living Anionic Polymerization was achieved. The high molecular weight poly(4-diphenylaminostyrene) (PDAS), synthesized using the RLi/TMEDA system, had a syndiotactic-rich configuration, independent of the Polymerization solvent.