Synthesis of model linear tetrablock quaterpolymers and pentablock quintopolymers of ethylene oxide

Ekizoglou, Nikos; Hadjichristidis, Nikos

doi:10.1002/pola.10288

Cited by 51 publications

(31 citation statements)

References 11 publications

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“…27,36À41 Furthermore, the synthesis of polyisoprene (PI)-b-P2VP-b-poly(ethylene oxide) (PEO), PI-b-P2VP-b-P t BMA, and even a particular PI-b-P2VP-b-P t BMA-b-PEO was reported by Hadjichristidis et al 42,43 Needless to say, the corresponding triblock and tetrablock polymers having block segments different in sequential order cannot be synthesized by changing the sequential addition order of monomers.…”

Section: ' Introductionmentioning

confidence: 90%

Facile Synthesis of Triblock Co- and Terpolymers of Styrene, 2-Vinylpyridine, and Methyl Methacrylate by a New Methodology Combining Living Anionic Diblock Copolymers with a Specially Designed Linking Reaction

et al. 2011

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Triblock co-and terpolymers with orders of blocks synthetically difficult to be obtained by means of sequential living anionic polymerization were successfully synthesized by developing a new methodology combining living anionic block copolymers with a specially designed linking reaction. The synthesized polymers involve ACB and BAC triblock terpolymers and ABA 0 , ACA 0 , and BCB 0 triblock copolymers, where A, B, and C are polystyrene, poly(2-vinylpyridine), and poly(methyl methacrylate) segments, respectively. The A 0 , A as well as B, B 0 are identical in polymer structure but different in molecular weight. All of them are new type triblock ter-and copolymers with well-defined structures, i.e., predictable molecular weights, compositions, and narrow molecular weight distributions. Transmission electron microscopic studies were performed on bulk morphologies of ACB and BAC triblock terpolymers to exemplarily investigate the influence of changing block sequence and thus changing interfaces. Although both terpolymers showed the tendency to form a lamellaÀlamella morphology, ACB revealed unusually strongly curved lamellae and BAC even undulated lamellae. ' INTRODUCTIONBlock polymers with a high degree of molecular and compositional homogeneity have attracted increasing interest as model polymers to elucidate interesting properties and behavior in combination with morphologies and molecular assemblies. 1À9 Such welldefined block polymers are usually synthesized by means of living anionic polymerization where two or more monomers are sequentially added to appropriate anionic initiators. 10 In fact, well-defined AB diblock copolymers, ABC triblock terpolymers, and (AB) n multiblock copolymers have been successfully synthesized.In order to achieve further design and synthesis of well-defined block polymers by using living anionic polymerization, it is

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Section: ' Introductionmentioning

confidence: 90%

Facile Synthesis of Triblock Co- and Terpolymers of Styrene, 2-Vinylpyridine, and Methyl Methacrylate by a New Methodology Combining Living Anionic Diblock Copolymers with a Specially Designed Linking Reaction

et al. 2011

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“…The morphologies and the phase diagrams for AB diblock copolymer, linear ABC triblock copolymer, even ABC 3-miktoarm copolymer are intensively studied both theoretically and experimentally [1e16]. The more complicated block copolymer, such as those of linear ABCA [17], and ABCD [18e22], ABCDE [20] types and even ABCD 4-miktoarm star quarterpolymer [23] (A is polystyrene, B is polybutadiene, C is polyisoprene, and D is poly(4-methylstyrene)) are synthesized. After that, Dotera et al [24,25] found that a monodisperse symmetric ABCD star block copolymer melt undergoes a microphase separation by using Monte Carlo simulations.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study on morphology of ABCD 4-miktoarm star block copolymer

Wang

2007

Polymer

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“…It is known that phenyl vinyl sulfoxide [67] and alkyl isocyanate monomers [43][44][45][46] undergo living anionic polymerization to result in interesting polymers, poly(4-phenyl vinyl sulfoxide), convertible to conductive rod-like poly(acetylene) and poly(alkyl isocyanate)s with helical conformation. These specialty functional polymers may also be used, at least to a certain extent, in the linking methodology to synthesize block polymers containing blocks with rod-like and helical conformations.…”

Section: Future Outlookmentioning

confidence: 99%

“…The first synthetic example was an ABCD tetrablock quaterpolymer of PS-b-PI-b-P2VP-b-poly(ethylene oxide) (PEO), which was synthesized by the sequential addition of styrene, isoprene, 2VP, and EO to benzyl potassium as the initiator [43]. The polymerizations of the first three monomers were carried out in THF at −78 °C for 1, 1, and 0.5 h, respectively, while the final polymerization of EO was performed in THF at 50 °C for five days.…”

Section: Synthesis Of Block Polymers By Sequential Polymerizationmentioning

confidence: 99%

Precise Synthesis of Block Polymers Composed of Three or More Blocks by Specially Designed Linking Methodologies in Conjunction with Living Anionic Polymerization System

et al. 2013

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This article reviews the successful development of two specially designed linking methodologies in conjunction with a living anionic polymerization system for the synthesis of novel multiblock polymers, composed of three or more blocks, difficult to be synthesized by sequential polymerization. The first methodology with the use of a new heterofunctional linking agent, 2-(4-chloromethylphenyl)ethyldimethylchlorosilane (1), was developed for the synthesis of multiblock polymers containing poly(dimethylsiloxane) (PDMS) blocks. This methodology is based on the selective reaction of the chain-end silanolate anion of living PDMS, with the silyl chloride function of 1, and subsequent linking reaction of the resulting ω-chain-end-benzyl chloride-functionalized polymer with either a living anionic polymer or living anionic block copolymer. With this methodology, various multiblock polymers containing PDMS blocks, up to the pentablock quintopolymer, were successfully synthesized. The second methodology using an α-phenylacrylate (PA) reaction site was developed for the synthesis of multiblock polymers composed of all-vinyl polymer blocks. In this methodology, an α-chain-end-PA-functionalized polymer or block copolymer, via the living anionic polymerization, was first prepared and, then, reacted with appropriate living anionic polymer or block copolymer to link the two polymer chains. As OPEN ACCESSPolymers 2013, 5 1013 a result, ACB (BCA), BAC (CAB), (AB) n , (AC) n , ABA, ACA, BCB, and ABCA multiblock polymers, where A, B, and C were polystyrene, poly(2-vinylpyridine), and poly(methyl methacrylate) segments, could be successfully synthesized. The synthesis of triblock copolymers, BAB, CAC, and CBC, having molecular asymmetry in both side blocks, was also achieved. Furthermore, the use of living anionic polymers, derived from many other monomers, categorized as either of styrene, 2-vinylpyridine, or methyl methacrylate in monomer reactivity, in the linking methodology enabled the number of synthetically possible block polymers to be greatly increased. Once again, all of the block polymers synthesized by these methodologies are new and cannot be synthesized at all by sequential polymerization. They were well-defined in block architecture and precisely controlled in block segment.

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Synthesis of model linear tetrablock quaterpolymers and pentablock quintopolymers of ethylene oxide

Cited by 51 publications

References 11 publications

Facile Synthesis of Triblock Co- and Terpolymers of Styrene, 2-Vinylpyridine, and Methyl Methacrylate by a New Methodology Combining Living Anionic Diblock Copolymers with a Specially Designed Linking Reaction

Facile Synthesis of Triblock Co- and Terpolymers of Styrene, 2-Vinylpyridine, and Methyl Methacrylate by a New Methodology Combining Living Anionic Diblock Copolymers with a Specially Designed Linking Reaction

Theoretical study on morphology of ABCD 4-miktoarm star block copolymer

Precise Synthesis of Block Polymers Composed of Three or More Blocks by Specially Designed Linking Methodologies in Conjunction with Living Anionic Polymerization System

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