Synthesis of amphiphilic A2B star‐shaped copolymers of polystyrene‐b‐[poly(ethylene oxide)]2 via atom transfer nitroxide radical coupling

Huang, Kun; Huang, Jian; Pan, Mugang; Wang, Guowei; Huang, Junlian

doi:10.1002/pola.26037

Cited by 12 publications

(8 citation statements)

References 84 publications

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“…[13][14][15][16][17][18] In addition, the combination of living radical polymerizations and living ring-opening polymerizations have been successfully utilized to create miktoarm star copolymers consisting of various kinds of polymer arms. [19][20][21][22] However, a challenge still exists in the precise synthesis of miktoarm star polymers containing rod-like blocks mainly due to the difficulty in the preparation of the well-defined rod-like polymer segment. Although several pioneering studies concerning the miktoarm star polymers containing rod-like blocks, such as poly(L-glutamic acid), 23,24 poly(n-hexyl isocyanate), [25][26][27][28] and poly(3-alkylthiopehe)s, [29][30][31] have been reported, the effect of the miktoarm type architectures on the self-assembling behaviors remains largely unexplored.…”

Section: Introductionmentioning

confidence: 99%

Rod–coil type miktoarm star copolymers consisting of polyfluorene and polylactide: precise synthesis and structure–morphology relationship

et al. 2015

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Abstract.A series of rod-coil miktoarm star copolymers consisting of poly [2,7-(9,9-dihexylfluorene)] (PF) and polylactide (PLA) arms as the rod and coil segments, respectively, were synthesized by combining the chain-growth Suzuki-Miyaura coupling polymerization and living ring-opening polymerization (ROP). First, PFs having a hydroxyl group at the α-chain end (PF-BnOH) were prepared by the polymerization of 2-(7-bromo-9,9-dihexyl-9H-fluorene-2-yl)4,4,5,5-tetramethyl-1,2,3-dioxaborolane using the initiating system of 4-(tetrahydropyran-2'-yloxymethyl)-iodobenzene/Pd2(dba)3/t-Bu3P.

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Section: Introductionmentioning

confidence: 99%

Rod–coil type miktoarm star copolymers consisting of polyfluorene and polylactide: precise synthesis and structure–morphology relationship

et al. 2015

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“…However, these methods could not afford a high efficiency. In the current case, we employed an efficient coupling method, ATNRC, a click‐like coupling reaction between TEMPO‐containing polymer and Br‐containing polymer, to achieve G‐PIB nanocomposites under mild conditions (room temperature and common organic solvent) using CuBr/PMDETA as catalytic system.…”

Section: Resultsmentioning

confidence: 99%

“…Despite these great achievements, we deemed that we still need to search for more efficient and convenient methods of chemical functionalization, especially polymer functionalization, of graphene sheets. Herein, we reported the preparation of polyisobutylene‐incorporated graphene by the combination of cationic polymerization of isobutylene and atom transfer nitroxide radical coupling chemistry (ATNRC) . or single electron transfer‐nitroxide radical coupling chemistry (SET‐NRC) .…”

Section: Introductionmentioning

confidence: 99%

ATNRC/SET-NRC synthesis of graphene/polyisobutylene nanocomposites

Liu

Yang

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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Two polyisobutylene‐grafted graphene nanocomposites were prepared by CuBr‐catalyzed atom transfer nitroxide radical coupling (ATNRC) and Cu‐catalyzed single electron transfer‐nitroxide radical coupling (SET‐NRC) chemistry under mild conditions, respectively, through the grafting‐onto strategy. Graphene oxide was first reduced to graphene by diazonium addition reaction followed by treating graphene with ethyl 2‐bromoisobutyrate for introducing Br‐containing groups onto the surface to give G‐Br. The presynthesized well‐defined functional polyisobutylene (PIB) possessing 2,2,6,6‐tetramethylpiperidine‐1‐oxyl terminal group obtained via cationic polymerization of isobutylene was then coupled with G‐Br through ATNRC or SET‐NRC at room temperature to afford polymer‐modified graphene, G‐PIB. SET‐NRC method has a faster coupling rate using cheaper reagent (Cu wire instead of CuBr) in comparison with ATNRC approach. Detailed characterizations including FT‐IR, Raman, 1H NMR, TGA, AFM, and TEM assured us of successful anchoring of PIB chains onto the surface of graphene sheets. The resulting G‐PIB nanocomposites still maintain the separated single layers in dispersion and the dispersibilities in organic solvents are significantly improved. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 4505–4514

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“…Triethylamine (TEA), pyridine, dichloromethane (DCM) were dried over calcium hydride (CaH 2 ) and distilled under argon atmosphere before use. 4‐(2,3‐dihydroxypropoxy)‐TEMPO (DHP‐TEMPO) was synthesized according to the literature procedure …”

Section: Methodsmentioning

confidence: 99%

Facile synthesis of polyester dendrimer via combining thio‐bromo “Click” chemistry and ATNRC

Fan

Wang

2015

J. Polym. Sci. Part A: Polym. Chem.

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This article reports on developing an efficient synthesis approach to aliphatic polyester dendrimer, poly(thioglycerol-2-propionate) (PTP), by combination of thio-bromo "Click" chemistry with atom transfer nitroxide radical coupling (ATNRC). Through the one-pot two-step method, linear polystyrene with hydroxyl end groups (l-PS-2OH) was obtained by first atom transfer radical polymerization of styrene and following termination using 4-(2,3-dihydroxypropoxy)-TEMPO (DHP-TEMPO) to capture the PS macroradicals via ATNRC method. Using l-PS-2OH as support, the dendritic repeating units divergently were grown from the hydroxyl end groups via esterification and thio-bromo "Click" reaction two-step process. In every generation, the resulting intermediates l-PS-d-PTP (G1-G4) can be easily isolated from the excessive unreacted monomers by simple precipitation in ethanol without help of time, labor and solvent consuming column chromatographic purification. At last, cleavage of the alkoxyamine group between the PS support and dendrimer at elevated temperature (125 C) provided the targeted polyester dendrimer PTP up to the fourth generation.

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Synthesis of amphiphilic A₂B star‐shaped copolymers of polystyrene‐b‐[poly(ethylene oxide)]₂ via atom transfer nitroxide radical coupling

Cited by 12 publications

References 84 publications

Rod–coil type miktoarm star copolymers consisting of polyfluorene and polylactide: precise synthesis and structure–morphology relationship

Rod–coil type miktoarm star copolymers consisting of polyfluorene and polylactide: precise synthesis and structure–morphology relationship

ATNRC/SET-NRC synthesis of graphene/polyisobutylene nanocomposites

Facile synthesis of polyester dendrimer via combining thio‐bromo “Click” chemistry and ATNRC

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