Programmed Synthesis of Copolymer with Controlled Chain Composition Distribution via Semibatch RAFT Copolymerization

Sun, Xu; Luo, Yingwu; Wang, Rui; Li, Bo‐Geng; Liu, Bei; Zhu, Shiping

doi:10.1021/ma061677v

Cited by 102 publications

(114 citation statements)

References 45 publications

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“…96 [213] BA [213] S [213] C S S 98* [265] BA [62,216,265] BA [216] St [265] St/BA [265,266] 99 [264] Poly ( [264] A See footnote A of Table 3. B See footnote B of Table 3.…”

Section: *mentioning

confidence: 99%

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

893

720

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This paper provides a second update to the review of reversible deactivation radical polymerization achieved with thiocarbonylthio compounds (ZC(=S)SR) by a mechanism of reversible addition-fragmentation chain transfer (RAFT) that was published in June 2005 (Aust. J. Chem. 2005, 58, 379-410). The first update was published in November 2006 (Aust. J. Chem. 2006, 59, 669-692). This review cites over 500 papers that appeared during the period mid-2006 to mid-2009 covering various aspects of RAFT polymerization ranging from reagent synthesis and properties, kinetics and mechanism of polymerization, novel polymer syntheses and a diverse range of applications. Significant developments have occurred, particularly in the areas of novel RAFT agents, techniques for end-group removal and transformation, the production of micro/nanoparticles and modified surfaces, and biopolymer conjugates both for therapeutic and diagnostic applications.

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“…96 [213] BA [213] S [213] C S S 98* [265] BA [62,216,265] BA [216] St [265] St/BA [265,266] 99 [264] Poly ( [264] A See footnote A of Table 3. B See footnote B of Table 3.…”

Section: *mentioning

confidence: 99%

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

893

720

View full text Add to dashboard Cite

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“…Gradient copolymers are of great interest because of their fascinating properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14] and their simple synthesis via controlled/living radical polymerization (CRP) techniques, 15 such as atom-transfer radical polymerization (ATRP), 2,[16][17][18][19] reversible addition-fragmentation transfer (RAFT), 20,21 and nitroxide-mediated CRP. 4,6,[8][9][10][11][12][13][22][23][24] Gradient copolymers have also been synthesized using other living or pseudo-living polymerization methods such as ring-opening metathesis polymerization 7,14,25 and cationic polymerization.…”

Section: Introductionmentioning

confidence: 99%

Amphiphilic gradient copolymer of [poly(ethylene glycol) methyl ether] methacrylate and styrene via atom transfer radical polymerization

et al. 2011

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Well-defined amphiphilic gradient copolymers of poly(ethylene glycol) methyl ether methacrylate (PEGMA) and styrene were successfully synthesized using atom transfer radical polymerization. The relative reactivity ratio of PEGMA to styrene was determined using the Jaacks method. The initial feed ratio of the two monomers had a significant effect on the copolymer's gradient composition. The resultant copolymers were characterized by nuclear magnetic resonance and Fourier transform-infrared spectroscopy to confirm their structures and monomer compositions. The lower critical solution temperature behavior of the copolymers was investigated using ultraviolet-visual spectroscopy. The micellization behavior of the PEGMA and styrene copolymers in aqueous solution was observed by transmission electron microscopy and dynamic laser scattering.

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“…Good control over molecular weight distribution (MWD) and chain microstructure has led to employing this technique to access a wide range of polymer architectures and topologies, including block [3] , gradient [4] , graft, star [5] and hyper branched [6] .…”

Section: Introductionmentioning

confidence: 99%

Effect of silica nanoparticle loading and surface modification on the kinetics of RAFT polymerization

Salami‐Kalajahi

Haddadi‐Asl

Behboodi-Sadabad

et al. 2012

Journal of Polymer Engineering

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S-(thiobenzoyl)thioglycolic acid was used to synthesize poly(methyl methacrylate) via reversible addition-fragmentation chain transfer (RAFT) polymerization. To study the polymerization kinetics, in situ polymerization reactions were performed with different loading of nanoparticles. To investigate the effect of surface modifi cation on the polymerization kinetics, similar reactions were performed with 3-methacryloxypropyldimethylchlorosilane-modifi ed nanoparticles. Conversion, reaction rate, molecular weight and polydispersity index (PDI) were monitored during polymerization. According to results, pseudo-fi rst order kinetics is achieved, but the rate constant of chain transfer reaction to the RAFT agent (C tr ) has a very small value. Adding nanoparticles causes no considerable change in the kinetic curves, while there is an optimum value for nanoparticles loading in which the polymerization rate reaches its maximum level. A similar trend is observed for molecular weight; however, increasing silica content results in an increase in PDI values. In comparison with pristine silica nanoparticles, the polymerization rate increases slowly in the case of modifi ed particles. Also, molecular weight and PDI for free and graft chains are studied separately. The molecular weight of free chains increases with increasing nanoparticles loading up to 7 wt % and then decreases, while PDI values increase continually by adding nanoparticles. However, for graft chains, molecular weight and PDI values increase with increasing nanoparticle content.

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Programmed Synthesis of Copolymer with Controlled Chain Composition Distribution via Semibatch RAFT Copolymerization

Cited by 102 publications

References 45 publications

Living Radical Polymerization by the RAFT Process - A Second Update

Living Radical Polymerization by the RAFT Process - A Second Update

Amphiphilic gradient copolymer of [poly(ethylene glycol) methyl ether] methacrylate and styrene via atom transfer radical polymerization

Effect of silica nanoparticle loading and surface modification on the kinetics of RAFT polymerization

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