Novel amphiphilic homopolymers containing <i>meta-</i>
 and <i>para-</i>
pyridine moieties with living characteristics and their self-assembly

Hur, Yoon-Hyung; Kang, Nam‐Goo; Kang, Beom‐Goo; Yu, Yong‐Guen; Changez, Mohammad; Lee, Jae‐Suk

doi:10.1002/pola.26743

Cited by 13 publications

(19 citation statements)

References 38 publications

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“…The monomers, vinyl acetate (Aldrich, USA, 99%), glycidyl methacrylate (Aldrich, USA, 97%), acrylonitrile (Aldrich, USA, 99%), methyl methacrylate (Aldrich, USA, 99%), 2‐hydroxyethyl methacrylate (HEMA) (Aldrich, USA, 97%), hydroxypropyl methacrylate (Aldrich, USA, 97%), and 4‐hydroxybutyl methacrylate (Aldrich, USA, 94%) were passed through activated alumina, dried for 24 h over calcium hydride, and finally distilled under reduced pressure before use and stored in refrigerator. 4‐(4‐vinylphenyl)pyridine (synthesized in our laboratory) and 6‐vinylpyridine‐3‐carbonitrile (synthesized in our laboratory) were used without further purification. 2,2′‐Azobis[2‐(2‐imidazolin‐2‐yl)propane]dihydrochloride (VA‐044) was purchased from Wako Inc. Japan and recrystallized from methanol before use, and potassium persulfate (Aldrich, USA, 99.99%) was used as received.…”

Section: Methodsmentioning

confidence: 99%

Self‐emulsion polymerization of amphiphilic monomers—a green route to synthesis of polymeric nanoscaffolds

Kumar

Lee

Thomas

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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Self-emulsion polymerization (SEP), a green route developed by us for the polymerization of amphiphilic monomers, does not require any emulsifier or an organic solvent except that the water-soluble initiators such as 2,2 0 -azobis[2-(2-imidazolin-2-yl) propane]dihydrochloride (VA-044) and potassium persulfate (KPS) are only used. We report here the polymer nanoscaffolds from a number of amphiphilic monomers, which can be used for in situ encapsulation of a variety of nanoparticles. As a demonstration of the efficacy of these nanoscaffolds, the synthesis of a biocompatible hybrid nanoparticle (nanohybrid), prepared by encapsulating Fe 3 O 4 magnetic nanoparticle (Fe 3 O 4 MNPs) in poly(2-hydroxyethyl methacrylate) in water, for MRI application is presented. The nanohybrid prepared following the SEP in the form of an emulsion does not involve the use of any stabilizing agent, crosslinker, polymeric emulsifier, or surfactant. This water-soluble, spherical, and stable nanohybrid containing Fe 3 O 4 MNPs of average size 10 AE 2 nm has a zeta potential value of −41.89 mV under physiological conditions. Magnetic measurement confirmed that the nanohybrid shows typical magnetic behavior having a saturation magnetization (Ms) value of 32.3 emu/g and a transverse relaxivity (r2) value of 29.97 mM −1 s −1 , which signifies that it can be used as a T2 contrast agent in MRI.

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Section: Methodsmentioning

confidence: 99%

Self‐emulsion polymerization of amphiphilic monomers—a green route to synthesis of polymeric nanoscaffolds

Kumar

Lee

Thomas

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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“…The lving anionic polymerization of three isomeric pyridine derivatives, 2‐(4‐vinylphenyl)pyridine (2VPPy), 3‐(4‐vinylphenyl)pyridine (3VPPy), and 4‐(4‐vinylphenyl)pyridine (4VPPy), was investigated with a focus on the effects of the isomeric structures by Lee's group . These pyridine derivatives‐bearing polymers were successfully synthesized under different conditions.…”

Section: Anionic Polymerization Of Functional Monomers: Triphenylaminmentioning

confidence: 99%

“…Recently, the precise synthesis of amphiphilic homopolymers through living anionic polymerization is has been achieved. This method is able to introduce various pyridine moieties onto para ‐substituted styrene as shown in Figure …”

Section: Anionic Polymerization Of Functional Monomers: Triphenylaminmentioning

confidence: 99%

Precise Synthesis of Functional Block Copolymers by Living Anionic Polymerization of Vinyl Monomers Bearing Nitrogen Atoms in the Side Chain

Kim

Kang

et al. 2017

Macro Chemistry & Physics

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Precise synthetic methods to prepare functional block copolymers with heteroatoms (nitrogen, oxygen, sulfur, phosphorous, halogen, etc.) have received much attention for the fabrication of practical nanomaterials. Specifically, well-defined materials containing nitrogen-based functional groups show unique electrical, optical, and amphiphilic properties. To synthesize these products, living anionic polymerization is the most powerful method. However, the disruption of undesirable reactions is considered to be a great challenge in the anionic polymerization of functional monomers with heteroatoms. To overcome these problems, facile methods such as polymerization at low temperature, careful choice of additives and initiators, and the introduction of protective groups can be used. In this review, recent advances in the anionic polymerization of vinyl monomers with triphenylamine, carbazole, and pyridine moieties in the side chains will be discussed. Also covered is the morphological control of these polymers to obtain well-defined block copolymers for practical applications such as organic memory devices and light emitting diodes.

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“…[1][2][3][4][5][6] From the synthetic viewpoint, successful living anionic polymerization of certain monomers allows functional block copolymers with precise macromolecular structures to be prepared by sequential addition of monomers. [10][11][12][13] In general, the block copolymerization has to be performed by sequential addition of a less reactive monomer as the first monomer and a more reactive monomer as the second monomer to obtain the well-defined block copolymers. [10][11][12][13] In general, the block copolymerization has to be performed by sequential addition of a less reactive monomer as the first monomer and a more reactive monomer as the second monomer to obtain the well-defined block copolymers.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13] For instance, from the living nature of 4,4′-vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (B), the reactivity of B could be determined by block copolymerization with functional monomers such as St and 2-vinylpyridine (2VP). [11][12][13] For instance, from the living nature of 4,4′-vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (B), the reactivity of B could be determined by block copolymerization with functional monomers such as St and 2-vinylpyridine (2VP).…”

Section: Introductionmentioning

confidence: 99%

Facile anionic synthesis of a well-controlled thermally cross-linkable block copolymer for polymer-based resistive memory device applications

et al. 2015

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The reactivities of 4-[(trimethylsilyl)ethynyl]styrene (A) and 4,4'-vinylphenyl-N,N-bis(4-tert-butylphenyl)benzenamine (B) were investigated by sequential anionic block copolymerization to synthesize a thermally cross-linkable block copolymer for memory device applications. From the investigation on the reactivities of the monomers, the well-defined poly(B-b-A) was synthesized in a simple manner by sequential addition of B as the first monomer and A as the second monomer using the commercially available s-butyllithium (s-BuLi) initiator in THF at −78°C. The sequential deprotection was then performed to prepare the deprotected polymer (d-poly(B-b-A)) containing the triphenylamine group as the conducting moiety and the ethynyl group as the thermal cross-linker, and the resulting thermally cross-linked polymer was used as an active layer of the memory device. The device fabricated with cross-linked d-poly(B-b-A) exhibited the write-once-read-many times (WORM) nonvolatile memory behavior, which is governed by the space-charge-limited current (SCLC) conduction mechanism and filament formation.

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Novel amphiphilic homopolymers containing meta- and para- pyridine moieties with living characteristics and their self-assembly

Cited by 13 publications

References 38 publications

Self‐emulsion polymerization of amphiphilic monomers—a green route to synthesis of polymeric nanoscaffolds

Self‐emulsion polymerization of amphiphilic monomers—a green route to synthesis of polymeric nanoscaffolds

Precise Synthesis of Functional Block Copolymers by Living Anionic Polymerization of Vinyl Monomers Bearing Nitrogen Atoms in the Side Chain

Facile anionic synthesis of a well-controlled thermally cross-linkable block copolymer for polymer-based resistive memory device applications

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