Dispersion polymerisation in supercritical CO2 using macro-RAFT agents

Zong, Mengmeng; Thurecht, Kristofer J.; Howdle, Steven M.

doi:10.1039/b812827h

Cited by 73 publications

(67 citation statements)

References 17 publications

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“…There have been several papers on the use of the RAFT process in the dispersion polymerization of St, [353] MMA, [447,448] and NVP [389] in supercritical CO 2 making use of macro-RAFT agents as stabilizer.…”

Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

“…The use of macro-RAFT agents as stabilizers in 'surfactantless' emulsion polymerization, [145,181,225,287,300,310,341,393,[443][444][445][446] miniemulsion polymerization, [124,181] suspension polymerization [381] and non-aqueous dispersion polymerization in both organic media, [188] and in supercritical CO 2 [353,389,447,448] [90,451] O O ϩ NH 3 Cl Ϫ APMAM 274 [152,153,168] Cl Ϫ O HN H 3 N ϩ AEMAM 275 [153] ϩ NH 3 Cl Ϫ O HN 276 [166] NH 3 Cl Ϫ O HN N N N ϩ has gained popularity. Particle nucleation and growth during RAFT emulsion polymerization of St and BA mediated by macro-RAFT agents of various compositions has been studied by calorimetry.…”

Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

See 1 more Smart Citation

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

902

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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Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

Section: Raft Polymerization In Heterogeneous Mediamentioning

confidence: 99%

Living Radical Polymerization by the RAFT Process - A Second Update

Moad¹,

Rizzardo²,

Thang³

2009

Aust. J. Chem.

902

720

View full text Add to dashboard Cite

show abstract

“…These block copolymers acted as in situ stabilizers, possibly leading to the formation of micelles. There are several reports on the production of hairy polymeric particles via thermally initiated dispersion polymerization of vinyl monomers using macro-CTAs [21][22][23]. The presence of PVAc-b-P4VP hairy chains anchored on the surface of PSt particles were confirmed using 1 H NMR and TEM analyses.…”

Section: Resultsmentioning

confidence: 73%

Synthesis of poly(vinyl acetate)-b-poly(4-vinylpyridine) block copolymers by a combination of cobalt-mediated radical polymerization and RAFT polymerization and their use in dispersion polymerization under UV radiation

Jeon

Youk

2012

Colloid Polym Sci

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Well-defined poly(vinyl acetate)-block-poly(4-vinylpyridine) (PVAc-b-P4VP) block copolymers were synthesized for the first time by a combination of cobaltmediated radical polymerization (CMRP) and reversible addition-fragmentation chain transfer (RAFT) polymerization, and were used to prepare PVAc-b-P4VP hairy polystyrene (PSt) particles. PVAc end-capped by a cobalt(II) acetylacetonate complex was first synthesized by the CMRP of vinyl acetate, after which the cobalt complex was modified into a dithiobenzoate group for the RAFT polymerization of 4-vinylpyridine. The hairy PSt particles were synthesized by the dispersion polymerization of St using the PVAc-b-P4VP as both a macro-initiator and a colloidal stabilizer under UV radiation. The average size of PSt particles synthesized with 20 wt.% of PVAc-b-P4VP (M n 0 39,500 g/mol) was 136 nm (CV019.2%). Very small Au nanoparticles were successfully immobilized on the surface of the PSt particles.

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“…13,16,[18][19][20][21][22][23][24][25] These polymers present unique physico-chemical properties due to their low surface energy, high thermal and chemical stability. 36,37 As well as their relatively high solubility in scCO2 these polymers have found applications in the dispersion polymerisation of many vinyl monomers such as methacrylate derivatives 13,16,[38][39][40][41][42] (MMA, HEMA, or others methacrylate esters), acrylonitrile 20,43 , N-vinylpyrrolidone 25,44 , styrene 22 resulting into well-defined spherical particles.…”

Section: Introductionmentioning

confidence: 99%