Synthesis of ultrahigh molecular weight bottlebrush block copolymers of ω-end-norbornyl polystyrene and polymethacrylate macromonomers

Seo, Ho‐Bin; Yu, Yong‐Guen; Chae, Chang‐Geun; Kim, Myung-Jin; Lee, Jae‐Suk

doi:10.1016/j.polymer.2019.06.009

Cited by 18 publications

(24 citation statements)

References 52 publications

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“…Gel permeation chromatograms of the bottlebrush polymers exhibited a gradual shift to the high‐molecular‐weight region with decreasing catalyst loading (Figure 2). A broadening in polydispersity was observed as the degree of polymerization increased, which has been noted in other grafting‐through polymerizations 17,25 . This result confirmed that GTP could produce high‐quality methacrylate‐based macromonomers for a grafting‐through ROMP.…”

Section: Resultssupporting

confidence: 82%

“…Norbornenyl‐terminated polymethacrylates are synthesized by anionic polymerization 23–25 or reversible‐addition‐fragmentation‐transfer (RAFT) radical polymerization with a norbornene group containing an initiator or a terminator 26 . Lee and coworkers have demonstrated the applicability of anionic polymerization for the highly efficient poly(methyl methacrylate) (PMMA) and poly(benzyl methacrylate) macromonomer syntheses 23–25 . The highly reactive anionic chain‐end was capped with norbornenyl acid chloride.…”

Section: Introductionmentioning

confidence: 99%

“…The methacrylate polymer is among the most abundant polymers utilized in numerous applications, 21,22 and as such, it is surprising that its use in bottlebrush polymers extends to a few limited cases, especially involving the grafting‐through process. Norbornenyl‐terminated polymethacrylates are synthesized by anionic polymerization 23–25 or reversible‐addition‐fragmentation‐transfer (RAFT) radical polymerization with a norbornene group containing an initiator or a terminator 26 . Lee and coworkers have demonstrated the applicability of anionic polymerization for the highly efficient poly(methyl methacrylate) (PMMA) and poly(benzyl methacrylate) macromonomer syntheses 23–25 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of well‐defined norbornenyl‐terminated poly(alkyl methacrylate)s by group transfer polymerization and their grafting‐through ring‐opening metathesis polymerization

Lee

Kim

2020

Journal of Polymer Science

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Highly efficient syntheses of poly(alkyl methacrylate)-based brush polymers were accomplished via a facile group transfer polymerization (GTP) and a consecutive grafting-through ring-opening metathesis polymerization. The GTP system, composed of the norbornenyl-methyl trimethylsilyl ketene acetal initiator and the N-(trimethylsilyl) bis(trifluoromethanesulfonyl)imide catalyst, rapidly and quantitatively generates norbornenyl-terminated poly(alkyl methacrylate) macromonomers with very narrow polydispersities (M w /M n < 1.10).The ring-opening metathesis polymerization of methacrylate macromonomers using Grubbs third generation catalyst successfully generated a group of methacrylate-based brush polymers, which assured the high quality of the macromonomers obtained from GTP. K E Y W O R D Sbottlebrush polymer,

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of well‐defined norbornenyl‐terminated poly(alkyl methacrylate)s by group transfer polymerization and their grafting‐through ring‐opening metathesis polymerization

Lee

Kim

2020

Journal of Polymer Science

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“…[ 96,97 ] They also contributed ultrahigh molecular weight bottlebrush block copolymers based on the macromonomers via anionic polymerization. [ 26,27 ] Teo, Xia and co‐workers [ 94 ] reported an efficient one‐pot synthesis of macromonomers via nitroxide radical coupling of a norbornene moiety to the chain end of various polymers from atom transfer radical polymerization (ATRP). Matson and co‐workers [ 77 ] and Pitsikalis and co‐workers [ 98 ] prepared polylactide (PLA) and poly(caprolactone) (PCL) grafts via ROP.…”

Section: Design and Synthesis Of Janus Bottlebrush Polymersmentioning

confidence: 99%

“…According to the architecture, bottlebrush polymers are basically classified into homo‐, [ 16,17 ] block‐, [ 18,19 ] random‐, core–shell‐, [ 20,21 ] and Janus‐types [ 22,23 ] (Figure 1B). Self‐assembly of bottlebrush polymers in bulk, [ 24–27 ] in solution, [ 28–30 ] and at the interfaces [ 31,32 ] features the unique microstructures and varied applications (Figure 1C).…”

Section: Introductionmentioning

confidence: 99%

Design, Synthesis, and Self‐Assembly of Janus Bottlebrush Polymers

Chen

Zhu

et al. 2020

Macromol. Rapid Commun.

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in solution, [28-30] and at the interfaces [31,32] features the unique microstructures and varied applications (Figure 1C). Janus bottlebrush polymers are a class of special molecular brushes, which have two incompatible side chains on the same repeating unit of the backbone. [33] "Janus" is the god in ancient Roman religion and myth with two faces looking to the past and the future. [34] In scientific community, the phrases containing Janus, such as "Janus nanoparticles," [35-38] "Janus beads," [39,40] and "Janus polymerization," [41-43] indicate something consisting of counterparts. [44-46] The design of Janus bottlebrush polymers was inspired by Janus particles. [35,47-49] The characteristic of Janus bottlebrush polymers is that the repeating unit of the backbone possesses two immiscible side chains. [50-52] Core-shell bottlebrush polymers with block copolymers as the side chains are usually not Janus-type unless the block side chains are unsymmetrical. [6] An emerging Janus core-shell bottlebrush polymer has been developed by transferring the side chains from homo polymers to two different block copolymers. [53] Design, synthesis, and self-assembly of Janus bottlebrush polymers have arouse much interest in polymer chemistry and material science. [54,55] In general, Janus bottlebrush polymers could be prepared via backbone-first [50] (grafting-to and graftingfrom) or side-chain-first [56] (grafting-through) strategy. Most of Janus bottlebrush polymers were reported via grafting-through approach. Macromonomers are first designed and subsequently polymerizations occur to form the backbone. [23] Backbonefirst route also allows for the synthesis of Janus bottlebrush polymers by using combined grafting-to and grafting-from approach. [57] The special unsymmetrical architectures enable Janus bottlebrush polymers to achieve ideal phase separation in bulk, [58,59] in solution, [52] and at the interface. [32] The preorganized interface can promote self-assembly process and avoid the distorted phase separation. [32,33] The self-assembly of Janus bottlebrush polymers achieves small domain size and tunable bulk property, [58,59] which is challenging for the traditional linear or bottlebrush polymers. [60,61] Therefore, Janus bottlebrush polymers have great potential applications in nanolithography, [58] photonic crystals, [62] biomedicine, [53] surfactants, [63] etc. The big families of bottlebrush polymers have been nicely reviewed by Grubbs and co-workers, [64] Müllner and coworkers, [65-67] Rzayev and co-workers, [7] Verduzco and coworkers, [6] and Matyjaszewski and co-workers [2]. As a young but significant class, Janus bottlebrush polymers have achieved remarkable advances in recent years. Therefore, this review attempts to focus on Janus bottlebrush polymers, covering Janus bottlebrush polymers are a class of special molecular brushes, which have two immiscible side chains on the repeating unit of the backbone. The characteristic architectures of Janus bottlebrush polymers enable unique selfassembly properties and br...

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Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

Wang

Chan

Zhao

et al. 2021

Advanced Optical Materials

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history and recent progress of 1D photonic films, also commonly referred to as photonic multilayer structures. In the third section, recent advances in exploiting confined self-assembly of block copolymers to produce photonic pigments are introduced and the diversity of structures that can be achieved with this method explored, ranging from concentric lamellae to porous particles with correlated disorder. Finally, we conclude by highlighting promising directions for future investigation.

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Synthesis of ultrahigh molecular weight bottlebrush block copolymers of ω-end-norbornyl polystyrene and polymethacrylate macromonomers

Cited by 18 publications

References 52 publications

Synthesis of well‐defined norbornenyl‐terminated poly(alkyl methacrylate)s by group transfer polymerization and their grafting‐through ring‐opening metathesis polymerization

Synthesis of well‐defined norbornenyl‐terminated poly(alkyl methacrylate)s by group transfer polymerization and their grafting‐through ring‐opening metathesis polymerization

Design, Synthesis, and Self‐Assembly of Janus Bottlebrush Polymers

Recent Advances in Block Copolymer Self‐Assembly for the Fabrication of Photonic Films and Pigments

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