A Versatile Method To Prepare RAFT Agent Anchored Substrates and the Preparation of PMMA Grafted Nanoparticles

Li, Chunzhao; Han, Junwon; Ryu, Chang Y.; Benicewicz, Brian C.

doi:10.1021/ma051983t

Cited by 300 publications

(314 citation statements)

References 27 publications

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“…A further example of the synthesis of a tertiary trithiocarbonate (50) from the thiocarbonyl disulfide has been published. [12] Two types of reagent (36 [94] and 37 [95] ; Scheme 6) have been reported for conversion of amine functionality in polymers/surfaces to RAFT agent functionality.…”

Section: Synthesis Of Raft Agentsmentioning

confidence: 99%

See 1 more Smart Citation

Living Radical Polymerization by the RAFT Process—A First Update

Moad¹,

Rizzardo²,

Thang³

2006

Aust. J. Chem.

859

787

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This paper provides a first update to the review of living radical polymerization achieved with thiocarbonylthio compounds (ZC(=S)SR) by a mechanism of Reversible Addition-Fragmentation chain Transfer (RAFT) published in June 2005. The time since that publication has witnessed an increased rate of publication on the topic with the appearance of well over 200 papers covering various aspects of RAFT polymerization ranging over reagent synthesis and properties, kinetics, and mechanism of polymerization, novel polymer syntheses, and diverse applications.

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Section: Synthesis Of Raft Agentsmentioning

confidence: 99%

“…35 [93] NIPAM [93] 36 [94],C 37 [95],C A First reference after compound number (where given) provides a synthesis of the RAFT agent. An asterisk indicates the RAFT agent is mentioned in our previous review or has been previously described.…”

Section: Characterization Of Raft-synthesized Polymersmentioning

confidence: 99%

Living Radical Polymerization by the RAFT Process—A First Update

Moad¹,

Rizzardo²,

Thang³

2006

Aust. J. Chem.

859

787

View full text Add to dashboard Cite

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“…Block-copolymer grafted SiO 2 nanoparticles were synthesized by sequential reversible addition-fragmentation chain transfer (RAFT) polymerization from the surface of the nanoparticles [18]. RAFT provides quantitative control over the molecular weight and polydispersity (PDI) of each block.…”

Section: Synthesismentioning

confidence: 99%

The Mechanical Properties of Epoxy Composites Filled with Rubbery Copolymer Grafted SiO2

Gao

Benicewicz

et al. 2012

Polymers

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This study demonstrated a method for toughening a highly crosslinked anhydride cured DGEBA epoxy using rubbery block copolymer grafted SiO 2 nanoparticles. The particles were synthesized by a sequential reversible addition-fragmentation chain transfer (RAFT) polymerization. The inner rubbery block poly(n-hexyl methacrylate) (PHMA) had a glass transition temperature below room temperature. The outer block poly(glycidyl methacrylate) (PGMA) was matrix compatible. A rubbery interlayer thickness of 100% and 200% of the particle core radius was achieved by grafting a 20 kg/mol and a 40 kg/mol PHMA at a graft density of 0.7 chains/nm 2 from the SiO 2 surface. The 20 kg/mol rubbery interlayer transferred load more efficiently to the SiO 2 cores than the 40 kg/mol rubbery interlayer and maintained the epoxy modulus up to a loading of 10 vol% of the rubbery interlayer. Both systems enabled cavitation or plastic dilatation. Improvement of the strain-to-break and the tensile toughness was found in both systems. We hypothesize that plastic void growth in the matrix is the primary mechanism causing the improvement of the ductility. OPEN ACCESSPolymers 2012, 4 188

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“…26,27 1,3-Dicyclohexylcarbodiimide (9.65 g, 46.8 mmol) in distilled dichloromethane (80 ml) was added dropwise to the solution under an Ar atmosphere and the reaction mixture was then stirred at room temperature for 18 h. The solvent was removed by evaporation and purified by silica column chromatography using chloroform as an eluent. Activated CPD was obtained as a red oil (3.61 g, 24.4%).…”

Section: Synthesis Of Activated Cpdmentioning

confidence: 99%

pH-responsive disruption of ‘liquid marbles’ prepared from water and poly(6-(acrylamido) hexanoic acid)-grafted silica particles

Inoue

Fujii

Nakamura

et al. 2011

Polym J

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A chain transfer agent was immobilized onto the surface of 11-lm diameter silica particles (CPD-SiO 2 ) for use in reversible addition-fragmentation chain transfer (RAFT)-controlled radical polymerization. pH-responsive poly(6-(acrylamido)hexanoic acid) (PAaH)-grafted silica particles (PAaH-SiO 2 ) were prepared via RAFT-controlled radical polymerization using CPD-SiO 2 . Immobilization of the PAaH chains onto the surface of silica particles was confirmed by thermogravimetric analysis, attenuated total reflection-Fourier transfer infrared and scanning electron microscopy measurements. The solubility of PAaH in water is strongly dependent on the pH of the solution. PAaH-SiO 2 was flocculated at pH 3 because of the hydrophobic interaction of the grafted PAaH chains with protonated carboxyl pendant groups. In contrast, PAaH-SiO 2 was dispersed at pH 10 because of electrostatic repulsion between the grafted PAaH chains with pendant carboxylate ions. Millimeter-sized 'liquid marbles' can be prepared using the pH-responsive PAaH-SiO 2 particles. The 'liquid marble' can be transferred intact onto the surface of a neutral or acidic water pool and exhibit long-term stability. When the pH of the water pool becomes alkaline, the 'liquid marble' immediately bursts on the surface of the water pool.

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A Versatile Method To Prepare RAFT Agent Anchored Substrates and the Preparation of PMMA Grafted Nanoparticles

Cited by 300 publications

References 27 publications

Living Radical Polymerization by the RAFT Process—A First Update

Living Radical Polymerization by the RAFT Process—A First Update

The Mechanical Properties of Epoxy Composites Filled with Rubbery Copolymer Grafted SiO2

pH-responsive disruption of ‘liquid marbles’ prepared from water and poly(6-(acrylamido) hexanoic acid)-grafted silica particles

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