Formation of the block copolymer aggregates via polymerization-induced self-assembly and reorganization

Sun, Jiaotong; Hong, Chun‐Yan; Pan, Cai‐Yuan

doi:10.1039/c2sm25537e

Cited by 144 publications

(135 citation statements)

References 65 publications

(23 reference statements)

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“…[ 10,12,21,29 ] It rather provides guidelines for helping non-specialists in conducting successful RAFT dispersion polymerization for producing various self-assembled morphologies.…”

Section: Introductionmentioning

confidence: 99%

Guidelines for the Synthesis of Block Copolymer Particles of Various Morphologies by RAFT Dispersion Polymerization

Rieger

2015

Macromol. Rapid Commun.

311

326

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This article presents the recent developments of radical dispersion polymerizaton controlled by reversible addition fragmentation chain transfer (RAFT) for the production of block copolymer particles of various morphologies, such as core-shell spheres, worms, or vesicles. It is not meant to be an exhaustive review but it rather provides guidelines for non-specialists. The article is subdivided into eight sections. After a general introduction, the mechanism of polymerization-induced self-assembly (PISA) through RAFT-mediated dispersion polymerization is presented and the different parameters that control the morphology produced are discussed. The next two sections are devoted to the choice of the monomer/solvent pair and the macroRAFT agent. Afterwards, post-polymerization morphological order-to-order transitions (i.e. morphological transitions triggered by extrinsic stimuli) or order-to-disorder transitions (i.e. disassembly of chains) are discussed. Assemblies based on more complex polymer architectures, such as triblock copolymers, are presented next, and finally the possibility to stabilize these structures by crosslinking is reported. The manuscript ends with a short conclusion and an outlook.

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“…[ 10,12,21,29 ] It rather provides guidelines for helping non-specialists in conducting successful RAFT dispersion polymerization for producing various self-assembled morphologies.…”

Section: Introductionmentioning

confidence: 99%

Guidelines for the Synthesis of Block Copolymer Particles of Various Morphologies by RAFT Dispersion Polymerization

Rieger

2015

Macromol. Rapid Commun.

311

326

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“…25 1 H NMR spectra were recorded in either CD 2 Cl 2 or CDCl 3 using a Bruker AV1-400 or AV1-250 MHz spectrometer. Typically sixty four scans were averaged per spectrum.…”

Section: Gel Permeation Chromatographymentioning

confidence: 99%

“…Currently, there is strong academic interest in polymerization- 25 induced self-assembly (PISA) [1][2][3] using living radical polymerization techniques such as reversible additionfragmentation chain transfer (RAFT) polymerization. [4][5][6][7][8] This approach has enormous potential for the design of bespoke - 30 any further processing steps.…”

Section: Introductionmentioning

confidence: 99%

RAFT dispersion polymerization in non-polar solvents: facile production of block copolymer spheres, worms and vesicles in n-alkanes

et al. 2013

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ABSTRACT. Well-defined poly(lauryl methacrylate-benzyl methacrylate) (PLMA-PBzMA) diblock copolymer nanoparticles are prepared in n-heptane at 90°C via reversible addition-fragmentation chain transfer (RAFT) polymerization. Under these conditions, the PLMA macromolecular chain transfer agent (macro-CTA) is soluble in n-heptane, whereas the growing PBzMA block quickly becomes insoluble. Thus this dispersion polymerization formulation leads to polymerization-induced self-assembly (PISA). 10Using a relatively long PLMA macro-CTA with a mean degree of polymerization (DP) of 37 or higher leads to the formation of well-defined spherical nanoparticles of 41 to 139 nm diameter, depending on the DP targeted for the PBzMA block. In contrast, TEM studies confirm that using a relatively short PLMA macro-CTA (DP = 17) enables both worm-like and vesicular morphologies to be produced, in addition to the spherical phase. A detailed phase diagram has been elucidated for this more asymmetric diblock 15 copolymer formulation, which ensures that each phase can be targeted reproducibly.1 H NMR spectroscopy confirmed that high BzMA monomer conversions (> 97 %) were achieved within 5 h, while GPC studies indicated that reasonably good blocking efficiencies and relatively low diblock copolymer polydispersities (M w /M n < 1.30) were obtained in most cases. Compared to prior literature reports, this allmethacrylic PISA formulation is particularly novel because: (i) it is the first time that higher order 20 morphologies (e.g. worms and vesicles) have been accessed in non-polar solvents and (ii) such diblock copolymer nano-objects are particularly relevant to potential boundary lubrication applications for engine oils.

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“…Micelles, which are micro-or nanoscale globular particles, are prepared by amphiphilic block co-polymers and can carry several guest molecules at the core region. The size selection of micelles is achieved by centrifuging the samples at different speed [61]. Popere et al [62] reported that micelles, which were formed by copolymer polystyrene-block-poly(4-vinylpyridine)…”

Section: B Doping Concentration Control By Monolayer Dopingmentioning

confidence: 99%

Dendrimers as Dopant Atom Carriers

Wu¹,

Dan²

2018

Dendrimers - Fundamentals and Applications

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Properties of modern semiconducting transistors and future electron or quantum devices are essentially determined by single dopant atoms. How to precisely control the individual dopant position is one of the key factors to advance these technologies. In this chapter, we first briefly introduce the research progress in single dopant devices. To fabricate single dopant devices at large scale, we then overview our previous propose to control the locations of single dopants by self-assembly of large molecules (polyglycerols) with each carrying one dopant atom. The synthesis process, doping properties, and challenges of the molecular doping technique will be thoroughly elaborated before we conclude this chapter.

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Formation of the block copolymer aggregates via polymerization-induced self-assembly and reorganization

Cited by 144 publications

References 65 publications

Guidelines for the Synthesis of Block Copolymer Particles of Various Morphologies by RAFT Dispersion Polymerization

Guidelines for the Synthesis of Block Copolymer Particles of Various Morphologies by RAFT Dispersion Polymerization

RAFT dispersion polymerization in non-polar solvents: facile production of block copolymer spheres, worms and vesicles in n-alkanes

Dendrimers as Dopant Atom Carriers

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