Applications of 1,1-Diphenylethylene Chemistry in Anionic Synthesis of Polymers with Controlled Structures

Quirk, Roderic P.; Yoo, Taejun; Lee, Young Joon; Kim, Jungahn; Lee, Bumjae

doi:10.1007/3-540-46414-x_3

Cited by 146 publications

(138 citation statements)

References 202 publications

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“…Therefore, DPE and its derivatives can be used widely as end-capping agent, coupling agent in preparation of initiator, block copolymer and star polymers. Applications of DPE in macromolecules design have been reviewed [12]. In this paper, comb-like branched polymers were prepared using the coupling reaction of DPE groups along backbone with PILi and PSLi.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of well-defined comb-like branched polymers

Zi-jian

2008

Front. Chem. Eng. China

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Well-defined comb-like branched polymers having one branch in each repeating unit have been successfully synthesized by the coupling reaction of living polystyrene (PS) and polyisoprene (PI) anions with 1, 1-diphenylethenyl (DPE) groups along PS backbone prepared via atom transfer radical polymerization (ATRP) of 4-vinylbenzyloxy benzophenone (Sc) followed by Wittig reaction. The resulting comb-like branched polymers were characterized by IR, 1 H-NMR, gel permeation chromatography (GPC) and static light scattering (SLS) in detail. The effect of living chains and DPE group molar ratio on grafting efficiency was discussed. The results show the coupling reaction of living chains and DPE groups was highly effective, and the coupling efficiency can be controlled via the feed molar ratios of living chains and DPE groups. Moreover, the effect of molecular weights of backbone (PSe) and PSLi or PILi on grafting efficiency was also discussed. The results show that when excess living polymers were used, the almost quantitative grafting efficiency could be achieved.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of well-defined comb-like branched polymers

Zi-jian

2008

Front. Chem. Eng. China

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“…Because DPE functionality is reactive under typical anionic, [6] cationic, [12] and radical polymerization conditions, [13] we chose ring-opening metathesis polymerization (ROMP), using a Grubbs initiator (RuCl 2 (CHC 6 H 5 )-[P(C 6 H 11 ) 3 ] 2 ), [14] to prepare a polyfunctional DPE agent from a DPE-functionalized norbornene monomer 1 (Scheme 1). The polymerization of 1 with the initial molar .…”

Section: Resultsmentioning

confidence: 99%

“…The reaction of 1-(4-bromophenyl)-1-phenylethylene (26.0 g, 100 mmol) with magnesium ( 6.05 (m, 1H of exo, -CH CH-), 6.12 (m, 1H, -CH CH-), 7.40-7.12 (m, 9H, Ar-H).…”

Section: -[4-(3-bromodecyl)phenyl]-1-phenylethylenementioning

confidence: 99%

“…Based on 1,1-diphenylethylene (DPE) chemistry, [6] we synthesized a novel macroinitiator which, to our knowledge, is the first polyfunctional anionic macroinitiator with one alkyllithium initiation functionality per repeating unit. Numerous agents with one or few non-homopolymerizable DPE functionalities have been synthesized and used to prepare anionic initiators with limited initiation sites.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of a Novel Polyfunctional Anionic Macroinitiator from a Polyfunctional 1,1‐Diphenylethylene Agent

Cheng

Yang

2005

Macromol. Rapid Commun.

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Summary: A polyfunctional 1,1‐diphenylethylene (DPE) agent was prepared by ring‐opening metathesis polymerization of a DPE‐functionalized norbornene monomer. Its reaction with sec‐butyllithium gave a novel polyfunctional anionic macroinitiator with one 1,1‐diarylalkyllithium initiation functionality per repeating unit. The significant applicability of this polyfunctional anionic macroinitiator was demonstrated by its excellent initiation efficiencies in anionic polymerization and a preparation of a graft copolymer with well‐controlled long and dense diblock grafts.Preparation of a polyfunctional anionic macroinitiator based on ROMP and DPE chemistry.imagePreparation of a polyfunctional anionic macroinitiator based on ROMP and DPE chemistry.

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“…Segmented stars are those bearing at least two kinds of segments (block) either as pure arms or as block copolymer arms. A number of synthetic strategies have been developed, based on "living" controlled polymerization methods that have led to a variety of star copolymers, consisting of two different monomers, and terpolymers (comprising three types of repeating units), exhibiting specific block/arm topologies [8][9][10][11][12][13][14][15][16][17]. Schematic representation of a number of different segmented stars is shown in Scheme 1; the aqueous solution properties of which are demonstrated in the present review.…”

Section: Star-shaped Topologiesmentioning

confidence: 99%

Water-Soluble Stimuli Responsive Star-Shaped Segmented Macromolecules

Iatridi

Tsitsilianis

2011

Polymers

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Star shaped segmented macromolecules constitute an interesting class of polymeric materials whose properties differ remarkably from those appearing in their linear counterparts. This review highlights the work done in the last decade, dealing with the self-assembly of star-shaped block copolymers and terpolymers of various topologies in aqueous media. This article focuses on a specific class of star shaped macromolecules designated as stimuli responsive. These stars bearblock/arms undergo sharp phase transitions upon responding to stimuli, such as temperature, pH, ionic strength and so forth. These transitions impose dramatic transformations on the morphology and, accordingly, in the functionality of the nanostructured associates. The number of arms, the specific functionality and topology of the different arm/blocks and the overall macromolecular architecture of the star polymer, significantly influence their behavior in terms of self-assembly and responsiveness.

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Applications of 1,1-Diphenylethylene Chemistry in Anionic Synthesis of Polymers with Controlled Structures

Cited by 146 publications

References 202 publications

Synthesis and characterization of well-defined comb-like branched polymers

Synthesis and characterization of well-defined comb-like branched polymers

Synthesis of a Novel Polyfunctional Anionic Macroinitiator from a Polyfunctional 1,1‐Diphenylethylene Agent

Water-Soluble Stimuli Responsive Star-Shaped Segmented Macromolecules

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