Precise Synthesis of Poly(methyl methacrylate) Brush with Well-Controlled Stereoregularity Using a Surface-Initiated Living Anionic Polymerization Method

Sato, Masanao; Kato, Tomoki; Ohishi, Tomoyuki; Ishige, Ryohei; Ohta, Nobuhiro; White, Kevin L.; Hirai, Tomoyasu; Takahara, Atsushi

doi:10.1021/acs.macromol.5b02773

Cited by 29 publications

(32 citation statements)

References 36 publications

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“…One strategy to increase the solubility is to use solubilizing agents, such as polymer materials that can complex with fullerene. PMMA exhibits helical conformation in solution and is capable of encapsulating fullerene within cavities to promote its solubility in polar organic solvent, [30][31][32] as illustrated in Fig. 1a.…”

Section: Complexation Of Fullerene and Pmmamentioning

confidence: 99%

Fullerene Polymer Complex Inducing Dipole Electric Field for Stable Perovskite Solar Cells

Wang

Yan

et al. 2019

Adv Funct Materials

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Lead halide perovskite solar cells (PSCs) have demonstrated great potential for realizing low-cost and easily fabricated photovoltaics. At this juncture, power conversion efficiency and longterm stability are two important factors limiting their transition. PSCs exhibit rapid environmental degradation since the perovskite layer is very sensitive to factors such as humidity, temperature, and ultraviolet light. Here, we demonstrate a novel successful approach that simultaneously improves the efficiency and stability of PSCs. This approach relies on incorporation of a dual-functional PMMAfullerene complex into the perovskite layer. The fullerene within perovskite layer forms a localized dipole-like electric field that favors the electron-hole separation resulting in significant improvement in current density and fill factor with conversion efficiency reaching 18.4%. The molecular-scale coating of hydrophobic PMMA on the perovskite grain boundary effectively blocks moisture penetration into the perovskite, thereby, significantly improving the stability against moisture, heat, and light. The PSCs with PMMA-fullerene complex showed no photovoltaic performance degradation for 250 days and exhibited 60 times higher stability compared to the state-of-the-art devices under continuous 1 sun illumination in ambient air.

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Section: Complexation Of Fullerene and Pmmamentioning

confidence: 99%

Fullerene Polymer Complex Inducing Dipole Electric Field for Stable Perovskite Solar Cells

Wang

Yan

et al. 2019

Adv Funct Materials

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“…Grafting from approach may entail the use of anionic or cationic or free radical polymerization in the functionalization of NPs. SI-anionic and cationic polymerizations are excellent routes in providing polymer grafted nanoparticles (PGNPs) with predetermined molecular weights of narrow dispersity [ 60 , 61 , 62 , 63 ]. However, the complexity of the experimental techniques limits their broad use [ 64 , 65 , 66 , 67 ].…”

Section: Grafting From Approachmentioning

confidence: 99%

Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

et al. 2021

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The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

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“…Although atactic polymethyl methacrylate (PMMA) does not form any specific structure, syndiotactic PMMA forms a helical structure, with 1 nm inner diameter and 2.3 nm outer diameter, in organic solvents. The syndiotactic PMMA encapsulates isotactic PMMA and functional molecules in their helical cavity . In this work, we report the preparation of a novel block copolymer consisting of syndiotactic PMMA and polymethacrylate‐functionalized POSS (PMAPOSS), designated as ( st ‐PMMA‐ b ‐PMAPOSS), and the encapsulation behavior of the st‐ PMMA segments in the block copolymer.…”

Section: Introductionmentioning

confidence: 99%

Preparation of polyhedral oligomeric silsesquioxane‐containing block copolymer with well‐controlled stereoregularity

Tsai

Kuretani

Manabe

et al. 2019

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

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Preparation of functional domains with a spacing of 10 nm is a benchmark set to fabricate next‐generation electronic devices. Organic–inorganic block copolymers form well‐ordered microphase separations with very small domain sizes. The design and preparation of a novel block copolymer consisting of syndiotactic polymethyl methacrylate (st‐PMMA) and polyhedral oligomeric silsesquioxane (POSS)‐functionalized polymethacrylate, designated as st‐PMMA‐b‐PMAPOSS, which can recognize functional molecules, are reported. The st‐PMMA segments form a helical structure and encapsulate C60 in the helical nanocavity, leading to the formation of an inclusion complex. Although the ordering of the domains is not high, C60 domains that are in a quasi‐equilibrium state, with about 10‐nm domain spacings, are generated using st‐PMMA‐b‐PMAPOSS that can recognize functional molecules. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2181–2189

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Precise Synthesis of Poly(methyl methacrylate) Brush with Well-Controlled Stereoregularity Using a Surface-Initiated Living Anionic Polymerization Method

Cited by 29 publications

References 36 publications

Fullerene Polymer Complex Inducing Dipole Electric Field for Stable Perovskite Solar Cells

Fullerene Polymer Complex Inducing Dipole Electric Field for Stable Perovskite Solar Cells

Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Preparation of polyhedral oligomeric silsesquioxane‐containing block copolymer with well‐controlled stereoregularity

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