Synthesis and morphology of ABC heteroarm star terpolymers of polystyrene, polybutadiene and poly(2-vinylpyridine)

Hückstädt, Hanno; Göpfert, Astrid; Abetz, Volker

doi:10.1002/(sici)1521-3935(20000201)201:3<296::aid-macp296>3.0.co;2-u

Cited by 214 publications

(62 citation statements)

References 35 publications

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“…[1][2][3][4] The first few examples of the preparation of ABC miktoarm star terpolymers exclusively employed anionic polymerization, relying on the strict control of molar ratios between reactive species. [5][6][7][8][9][10][11][12][13] With the advent of controlled radical polymerizations, such as nitroxide-mediated radical polymerization (NMP), atom transfer radical polymerization (ATRP), and reversible addition-fragmentation chain transfer (RAFT) polymerization, the once challenging task of synthesizing ABC Correspondence to: S. Liu (E-mail: sliu@ustc.edu.cn) miktoarm star polymers has been rendered much easier. [14][15][16][17][18][19] Feng and Pan 14 successful prepared ABC miktoarm star terpolymers consisting of polystyrene (PS), poly(methyl acrylate) (PMA), and poly(ethylene glycol) (PEG) via successive RAFT polymerization of styrene, maleic anhydride (MAh), and methyl acrylate, followed by the esterification reaction with monohydroxyl-terminated PEG.…”

Section: Introductionsupporting

confidence: 66%

Synthesis of amphiphilic and thermoresponsive ABC miktoarm star terpolymer via a combination of consecutive click reactions and atom transfer radical polymerization

Liu

et al. 2009

J. Polym. Sci. A Polym. Chem.

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Well-defined amphiphilic and thermoresponsive ABC miktoarm star terpolymer consisting of poly(ethylene glycol), poly(tert-butyl methacrylate), and poly(N-isopropylacrylamide) arms, PEG(-b-PtBMA)-b-PNIPAM, was synthesized via a combination of consecutive click reactions and atom transfer radical polymerization (ATRP). Click reaction of monoalkynyl-terminated PEG with a trifunctional core molecule bis(2-azidoethyl)amine, (N 3 ) 2 ANH, afforded difunctional PEG possessing an azido and a secondary amine moiety at the chain end, PEG-NHAN 3 . Next, the amidation of PEG-NHAN 3 with 2-chloropropionyl chloride led to PEG-based ATRP macroinitiator, PEG(AN 3 )ACl. The subsequent ATRP of N-isopropylacrylamide (NIPAM) using PEG(AN 3 )ACl as the macroinitiator led to PEG(AN 3 )-b-PNIPAM bearing an azido moiety at the diblock junction point. Finally, well-defined ABC miktoarm star terpolymer, PEG(-b-PtBMA)-b-PNIPAM, was prepared via the click reaction of PEG(AN 3 )-b-PNIPAM with monoalkynyl-terminated PtBMA. In aqueous solution, the obtained ABC miktoarm star terpolymer self-assembles into micelles consisting of PtBMA cores and hybrid PEG/PNIPAM coronas, which are characterized by dynamic and static laser light scattering, and transmission electron microscopy. On heating above the phase transition temperature of PNIPAM in the hybrid corona, micelles initially formed at lower temperatures undergo further structural rearrangement and fuse into much larger aggregates solely stabilized by PEG coronas.

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Section: Introductionsupporting

confidence: 66%

Synthesis of amphiphilic and thermoresponsive ABC miktoarm star terpolymer via a combination of consecutive click reactions and atom transfer radical polymerization

Liu

et al. 2009

J. Polym. Sci. A Polym. Chem.

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“…However, within the thin S (or S/C) layer a few B and V segments must come together due to the chain topology of the miktoarm star terpolymer. This is reasonable due to the strong incompatibility between B and V [9] and will be discussed further in the next section.…”

Section: Resultsmentioning

confidence: 99%

“…Synthesis and morphology of the SBV* miktoarm star terpolymers [9], the SB diblock copolymer [11], and the SV and VC diblock copolymers have been reported elsewhere [16]. The molecular characteristics and the morphologies are given in Tab.…”

Section: Experimental Partmentioning

confidence: 99%

“…Block copolymers show microphase-separated morphologies on this length scale and thus are an important class of materials. Investigations have been carried out on the morphologies, both for linear systems like AB block copolymers [4], ABC triblock terpolymers [5,6], or ABCD tetrablock quaterpolymers [7], as well as on other systems with non-linear topologies like AB miktoarm copolymers [8], or ABC miktoarm star terpolymers [9]. Also blending of linear block copolymers as another strategy to control morphology was used successfully [10,11].…”

Section: Introductionmentioning

confidence: 97%

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Formation of superlattices in blends of 3-miktoarm star terpolymers with diblock copolymers

Abetz

Jiang

2004

E-Polymers

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In this contribution we report on the morphological structures formed in blends of microphase-separated 3-miktoarm star terpolymers of polystyrene-armpolybutadiene-arm-poly(2-vinylpyridine) (SBV*) and polystyrene-block-polybutadiene (SB), polystyrene-block-poly(2-vinylpyridine) (SV), poly(2-vinylpyridine)-block-poly(cyclohexyl methacrylate) (VC) diblock copolymers. The morphologies are characterized by transmission electron microscopy. Blends with similar morphologies as known from linear triblock terpolymers are found, like core-shell structures based on cylinders or gyroids. Other blends show very distorted morphologies, or morphologies similar to the ones found for pure 3-miktoarm star terpolymers. While attractive interactions between blocks of the two species enhance the formation of common superlattices, blends with too large diblock copolymers tend to macrophase-separate.

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“…2 ) structure was observed from two different systems 17,18 and a family of (4.6.12), which looks like (3.4.6.4) structure was also reported for the other ABC-star molecule, 19 while coaxial structures were reported for another system. 20 Recently, three patterns, (6 3 ), (4.…”

mentioning

confidence: 99%

A mesoscopic Archimedean tiling having a new complexity in an ABC star polymer

Takano

Kawashima

Noro

et al. 2005

J Polym Sci B Polym Phys

156

175

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The Archimedean tiling (3 2 .4.3.4) is a regular but complex polygonal assembly of equilateral triangles and squares. This tiling pattern with mesoscopic repeating distance has been found for an ABC star-branched three-component polymer composed of polyisoprene, polystyrene, and poly(2-vinylpyridine). In this structure the environment of a molecule splits into multiple sites and two microdomains with different sizes and shapes are formed for one component. This complexity is the first observation in complex polymer systems and can lead to a new type of mesoscale self-organization. The tiling pattern has been observed for the other materials on much shorter length-scale; therefore, the experimental fact observed in the present study is demonstrating that the complexity is universal over different hierarchies.

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Synthesis and morphology of ABC heteroarm star terpolymers of polystyrene, polybutadiene and poly(2-vinylpyridine)

Abstract: Synthesis and morphology of ABC heteroarm star terpolymers ...

Cited by 214 publications

References 35 publications

Synthesis of amphiphilic and thermoresponsive ABC miktoarm star terpolymer via a combination of consecutive click reactions and atom transfer radical polymerization

Synthesis of amphiphilic and thermoresponsive ABC miktoarm star terpolymer via a combination of consecutive click reactions and atom transfer radical polymerization

Formation of superlattices in blends of 3-miktoarm star terpolymers with diblock copolymers

A mesoscopic Archimedean tiling having a new complexity in an ABC star polymer

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