1
|
Doi M, Ishige R, Ando S. Long‐Lived Luminescence Emitted from Imide Compounds Dispersed in Polymer Matrices after Continuous Ultraviolet Irradiation and its Relation to Oxygen Quenching. CHEMPHOTOCHEM 2023. [DOI: 10.1002/cptc.202200310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Marina Doi
- Tokyo Institute of Technology: Tokyo Kogyo Daigaku Dept. Chem. Sci. Eng. Ookayama, 2-12-1-E4-5, Meguro-ku Tokyo JAPAN
| | - Ryohei Ishige
- Tokyo Institute of Technology: Tokyo Kogyo Daigaku Dept. Chem. Sci. Eng. Ookayama, 2-12-1-E4-5, Meguro-ku Tokyo JAPAN
| | - Shinji Ando
- Tokyo Institute of Technology: Tokyo Kogyo Daigaku Chemistry and Materials Science Ookayama 2-12-1, Meguro-ku 152-8552 Tokyo JAPAN
| |
Collapse
|
2
|
Yamamoto A, Higaki Y, Thoma J, Kimmle E, Ishige R, Demé B, Takahara A, Tanaka M. Water modulates the lamellar structure and interlayer correlation of poly(perfluorooctyl acrylate) films: a specular and off-specular neutron scattering study. Polym J 2021. [DOI: 10.1038/s41428-021-00555-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AbstractComb-like polymers with pendant-like perfluorocarbon side chains self-assemble into smectic lamellae and have been extensively used as water-repellent, hydrophobic coating materials characterized by large water contact angles (θ > 120°). As poly(perfluorooctyl acrylate) films are “apparently hydrophobic” (θ > 120°), the interaction of such materials and water molecules has been largely overlooked. To unravel the molecular-level interactions between water and apparently hydrophobic polymers, specular and off-specular neutron scattering experiments were conducted at defined osmotic pressure ΠH2O. The poly{2-[(perfluorooctylethyl)carbamate]ethyl} acrylate (PFAUr-C8), which had a carbamate linker, transitioned to another lamellar phase at 89 °C. At T = 25 °C; the lamellar periodicity of PFAUr-C8 slightly increased with decreasing osmotic pressure, while the vertical correlation length increased. However, the poly[(perfluorooctyl)ethyl] acrylate (PFA-C8) that did not contain a carbamate linker directly transitioned to a disordered phase at 84 °C. The lamellar periodicity of PFA-C8 was largely independent of the osmotic pressure, suggesting that PFA-C8 was poorly hydrated. Remarkably, the vertical correlation length decreased with decreasing osmotic pressure. Because hydration facilitated by the linker modulated the smectic lamellae of the poly(perfluoroalkyl acrylate), water molecules could be used to optimize the self-assembly of apparently hydrophobic liquid crystalline polymers.
Collapse
|
3
|
Fujiwara E, Ishige R, Cerrón-Infantes DA, Taublaender MJ, Unterlass MM, Ando S. Compression and Thermal Expansion Behaviors of Highly Crystalline Polyimide Particles Prepared from Poly(amic acid) and Monomer Salts. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00779] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Daniel Alonso Cerrón-Infantes
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/165, 1060 Vienna, Austria
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
- CeMM−Research Center for Molecular Medicine of the Austrian Academy of Science, Lazarettgasse 14, AKH BT25.3, 1090 Vienna, Austria
| | - Michael Josef Taublaender
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/165, 1060 Vienna, Austria
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
| | - Miriam M. Unterlass
- Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/165, 1060 Vienna, Austria
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/163, 1060 Vienna, Austria
- CeMM−Research Center for Molecular Medicine of the Austrian Academy of Science, Lazarettgasse 14, AKH BT25.3, 1090 Vienna, Austria
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
4
|
Doi M, Muto K, Nara M, Liang N, Sano K, Mori H, Ishige R, Ando S. Photoluminescence Properties of Copolyimides Containing Naphthalene Core and Analysis of Excitation Energy Transfer between the Dianhydride Moieties. J PHOTOPOLYM SCI TEC 2021. [DOI: 10.2494/photopolymer.34.423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marina Doi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Koichiro Muto
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Mayuko Nara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Naiqiang Liang
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Kosuke Sano
- Chemical Research Laboratory, JFE Chemical Corporation
| | - Hiroaki Mori
- Chemical Research Laboratory, JFE Chemical Corporation
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
5
|
Ishige R, Song CL, Hara S, Ando S, Kazarian SG. Analysis of spatial orientation distribution of highly oriented polyimide film using micro ATR-FTIR spectroscopic imaging method. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
6
|
Fujiwara E, Orita R, Vyšniauskas A, Franckevičius M, Ishige R, Gulbinas V, Ando S. Ultrafast Spectroscopic Analysis of Pressure-Induced Variations of Excited-State Energy and Intramolecular Proton Transfer in Semi-Aliphatic Polyimide Films. J Phys Chem B 2021; 125:2425-2434. [PMID: 33629863 DOI: 10.1021/acs.jpcb.0c11500] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relationship between the photoexcitation dynamics and the structures of semi-aliphatic polyimides (3H-PIs) was investigated using ultrafast fluorescent emission spectroscopy at atmospheric and increased pressures of up to 4 GPa. The 3H-PI films exhibited prominent fluorescence with extremely large Stokes shifts (Δν > 10 000 cm-1) through an excited-state intramolecular proton transfer (ESIPT) induced by keto-enol tautomerism at the isolated dianhydride moiety. The incorporation of bulky -CH3 and -CF3 side groups at the diamine moiety of the PIs increased the quantum yields of the ESIPT fluorescence owing to an enhanced interchain free volume. In addition, 3H-PI films emitted another fluorescence at shorter wavelengths originating from closely packed polyimide (PI) chains (in aggregated forms), which was mediated through a Förster resonance energy transfer (FRET) from an isolated enol form into aggregated forms. The FRET process became more dominant than the ESIPT process at higher pressures owing to an enhancement of the FRET efficiency caused by the increased dipole-dipole interactions associated with a densification of the PI chain packing. The efficiency of the FRET rapidly increased by applying pressure up to 1 GPa owing to an effective compression of the interchain free volume and additionally gradually increased at higher pressures owing to structural and/or conformational changes in the main chains.
Collapse
Affiliation(s)
- Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryoji Orita
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Aurimas Vyšniauskas
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Marius Franckevičius
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Vidmantas Gulbinas
- Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius 10257, Lithuania
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
7
|
Ishige R, Tanaka K, Ando S. Quantitative analysis of stereoscopic molecular orientations in thermally reactive and heterogeneous noncrystalline thin films via variable-temperature infrared pMAIRS and GI-XRD. Polym J 2021. [DOI: 10.1038/s41428-020-00458-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
8
|
Takahara A, Higaki Y, Hirai T, Ishige R. Application of Synchrotron Radiation X-ray Scattering and Spectroscopy to Soft Matter. Polymers (Basel) 2020; 12:polym12071624. [PMID: 32708350 PMCID: PMC7407237 DOI: 10.3390/polym12071624] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/04/2020] [Accepted: 07/20/2020] [Indexed: 12/04/2022] Open
Abstract
Light produced by synchrotron radiation (SR) is much brighter than that produced by conventional laboratory X-ray sources. The photon energy of SR X-ray ranges from soft and tender X-rays to hard X-rays. Moreover, X-rays become element sensitive with decreasing photon energy. By using a wide energy range and high-quality light of SR, different scattering and spectroscopic methods were applied to various soft matters. We present five of our recent studies performed using specific light properties of a synchrotron facility, which are as follows: (1) In situ USAXS study to understand the deformation behavior of colloidal crystals during uniaxial stretching; (2) structure characterization of semiconducting polymer thin films along the film thickness direction by grazing-incidence wide-angle X-ray scattering using tender X-rays; (3) X-ray absorption fine structure (XAFS) analysis of the formation mechanism of poly(3-hexylthiophene) (P3HT); (4) soft X-ray absorption and emission spectroscopic analysis of water structure in polyelectrolyte brushes; and (5) X-ray photon correlation spectroscopic analysis of the diffusion behavior of polystyrene-grafted nanoparticles dispersed in a polystyrene matrix.
Collapse
Affiliation(s)
- Atsushi Takahara
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (Y.H.); (T.H.); (R.I.)
- Correspondence:
| | - Yuji Higaki
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (Y.H.); (T.H.); (R.I.)
- Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Tomoyasu Hirai
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (Y.H.); (T.H.); (R.I.)
- Department of Applied Chemistry, Faculty of Engineering, and Graduate School of Engineering, Osaka Institute of Technology, 5-16-1, Asahi-ku, Osaka 535-8585, Japan
| | - Ryohei Ishige
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; (Y.H.); (T.H.); (R.I.)
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, E4-5, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
9
|
Muto K, Fujiwara E, Ishige R, Ando S. Analysis of Pressure-induced Variations in the Crystalline Structures of Polyimides Having Flexible Linkages by Wide-Angle X-ray Diffraction. J PHOTOPOLYM SCI TEC 2020. [DOI: 10.2494/photopolymer.33.583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Koichiro Muto
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
10
|
Nara M, Orita R, Ishige R, Ando S. White-Light Emission and Tunable Luminescence Colors of Polyimide Copolymers Based on FRET and Room-Temperature Phosphorescence. ACS Omega 2020; 5:14831-14841. [PMID: 32596621 PMCID: PMC7315587 DOI: 10.1021/acsomega.0c01949] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 05/28/2020] [Indexed: 05/15/2023]
Abstract
Thermally stable copolyimide (CoPI) films exhibiting high optical transparency and room-temperature phosphorescence (RTP) were prepared by copolymerizing fluorescent dianhydride and brominated phosphorescent dianhydride with an alicyclic diamine. The CoPI films underwent a 5 wt % degradation at a temperature higher than 349 °C and exhibited dual fluorescent and phosphorescent emissions owing to their efficient Förster resonance energy transfer from the fluorescent to phosphorescent dianhydride moieties in the main chains, followed by an intersystem crossing from the singlet to triplet state of the latter moiety atoms. The CoPIs displayed bright RTP under a vacuum with various colors produced when adjusting the copolymerization ratio. CoPI with 5 mol % phosphorescent moiety (CoPI-05) emitted white light with high optical transparency owing to the suppression of the PI chain aggregation that causes a yellowish coloration. The copolymerization of fluorescent and phosphorescent PI moieties can control the photoluminescent properties of PI films and is applicable to color-tunable solid-state emitters, ratiometric oxygen sensors, and solar-spectrum converters.
Collapse
Affiliation(s)
- Mayuko Nara
- Department of Chemical Science
and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryoji Orita
- Department of Chemical Science
and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryohei Ishige
- Department of Chemical Science
and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Shinji Ando
- Department of Chemical Science
and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
11
|
|
12
|
Kuribayashi J, Ishige R, Hayashi M, Tokita M. Deformation of Hierarchical Lamellar Structure Formed by a Liquid Crystalline Block Copolymer. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Junpei Kuribayashi
- Department Chemical Science and EngineeringTokyo Institute of Technology Ookayama, Meguro‐ku Tokyo 152‐8552 Japan
| | - Ryohei Ishige
- Department Chemical Science and EngineeringTokyo Institute of Technology Ookayama, Meguro‐ku Tokyo 152‐8552 Japan
| | - Mikihiro Hayashi
- Department Chemical Science and EngineeringTokyo Institute of Technology Ookayama, Meguro‐ku Tokyo 152‐8552 Japan
| | - Masatoshi Tokita
- Department Chemical Science and EngineeringTokyo Institute of Technology Ookayama, Meguro‐ku Tokyo 152‐8552 Japan
| |
Collapse
|
13
|
Abstract
A new diamine containing an imidazole structure, 4,4′-(4,5-diphenyl-1H-imidazole-1,2-diyl)dianiline (DIMA), was synthesized to prepare photoconductive polyimides (PIs) with four types of dianhydrides such as 3,3′,4,4′-biphenyltetracarboxylic dianhydride, 4,4′-oxyduphthalic anhydride, 4,4′-(hexafluoroisopropylidene) diphthalic anhydride, and cyclobutane-1,2,3,4,-tetracarboxylic dianhydride, based on the fact that the imidazole ring is a useful n-type block with high electron-donating property and good thermal stability. The imidazole-containing diamine possesses high electron-donating properties due to the lone pair electrons at nitrogen, which affords a high hole-transport property. All the PIs prepared from DIMA were amorphous due to the large side group and kink structure of the diamine, optically transparent (transmittances of 92–98% at 450 nm), and exhibited high thermal stability (10% weight loss temperatures ranged 453–558°C).
Collapse
Affiliation(s)
- Keuk-Min Jeong
- Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea
| | - Pradip Kumar Tapaswi
- Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea
- Narasinha Dutt College, University of Calcutta, Kolkata, West Bengal, India
| | - Takehiko Kambara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-Ku, Tokyo, Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-Ku, Tokyo, Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-Ku, Tokyo, Japan
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, Pusan National University, Busan, South Korea
| |
Collapse
|
14
|
Tanaka K, Ando S, Ishige R. Spontaneous Chain Orientation of Aromatic Polyimides Evolved during Thermal Imidization from Shear-Oriented Glassy Liquid Crystalline Precursors. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazuyuki Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, E4-5, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, E4-5, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, E4-5, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
15
|
Liang N, Fujiwara E, Nara M, Ishige R, Ando S. Photoluminescence Properties of Novel Fluorescent Polyimide Based on Excited State Intramolecular Proton Transfer at The End Groups. J PHOTOPOLYM SCI TEC 2019. [DOI: 10.2494/photopolymer.32.449] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Naiqiang Liang
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Mayuko Nara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
16
|
Takizawa K, Fukuchi S, Takemasa C, Ishige R, Asai S, Ando S. Enhancing photoconductivity of aromatic polyimide films by incorporating fluorinated dianhydrides and main chain triphenylamine structure. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.10.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
17
|
Fujiwara E, Fukudome H, Takizawa K, Ishige R, Ando S. Pressure-Induced Variations of Aggregation Structures in Colorless and Transparent Polyimide Films Analyzed by Optical Microscopy, UV–Vis Absorption, and Fluorescence Spectroscopy. J Phys Chem B 2018; 122:8985-8997. [DOI: 10.1021/acs.jpcb.8b06423] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Hiroshi Fukudome
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Kazuhiro Takizawa
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
18
|
Ando S, Harada M, Okada T, Ishige R. Effective Reduction of Volumetric Thermal Expansion of Aromatic Polyimide Films by Incorporating Interchain Crosslinking. Polymers (Basel) 2018; 10:polym10070761. [PMID: 30960686 PMCID: PMC6403670 DOI: 10.3390/polym10070761] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 07/08/2018] [Accepted: 07/09/2018] [Indexed: 12/02/2022] Open
Abstract
To develop a facile method for reducing the coefficient of volumetric thermal expansion (CVE) of polymer films, the thermal expansion behaviors of thermally cross-linkable polyimide (PI) films with isomeric diamine structures were investigated via thermal mechanical analyses and optical interferometry measurements. The degree of crosslinking of the PI films containing the diphenylethynylene (Ph–C≡C–Ph) structure in the main chain was characterized by far-infrared (far-IR) spectra and density functional theory (DFT) calculations, and variations in the CVE induced by thermal crosslinking were quantitatively estimated. The crosslinking reactions effectively reduced the CVEs of the PI films by suppressing intermolecular free volume expansion and local molecular motions promoted at elevated temperatures. The lowest CVE value observed for a crosslinked PI cured at 400 °C (+98 ppm/K at 80–280 °C) was one of the smallest values reported to date in polymers. Incorporating interchain crosslinking into the main chain is an effective method for reducing the CVE of aromatic polymers.
Collapse
Affiliation(s)
- Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan.
| | - Mari Harada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan.
| | - Tomohiro Okada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan.
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, Ookayama 2-12-1-E4-5, Meguro-ku, Tokyo 152-8552, Japan.
| |
Collapse
|
19
|
Fujiwara E, Ishige R, Owaki S, Kita N, Yamada K, Matsuoka T, Sasaki S, Ando S. Pressure Induced Variations in Refractive Index of Aromatic Polyimide Film Analyzed by Brillouin Scattering. J PHOTOPOLYM SCI TEC 2018. [DOI: 10.2494/photopolymer.31.599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eisuke Fujiwara
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shota Owaki
- Department of Materials Science and Technology, Gifu University
| | - Naohiro Kita
- Department of Materials Science and Technology, Gifu University
| | - Kenta Yamada
- Department of Materials Science and Technology, Gifu University
| | - Takahiro Matsuoka
- Department of Electrical, Electronic and Computer Engineering, Gifu University
| | - Shigeo Sasaki
- Department of Electrical, Electronic and Computer Engineering, Gifu University
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
20
|
Nakanishi Y, Ishige R, Ogawa H, Sakakibara K, Ohno K, Morinaga T, Sato T, Kanaya T, Tsujii Y. USAXS analysis of concentration-dependent self-assembling of polymer-brush-modified nanoparticles in ionic liquid: [I] concentrated-brush regime. J Chem Phys 2018; 148:124902. [PMID: 29604836 DOI: 10.1063/1.5017552] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Using ultra-small angle X-ray scattering (USAXS), we analyzed the higher-order structures of nanoparticles with a concentrated brush of an ionic liquid (IL)-type polymer (concentrated-polymer-brush-modified silica particle; PSiP) in an IL and the structure of the swollen shell layer of PSiP. Homogeneous mixtures of PSiP and IL were successfully prepared by the solvent-casting method involving the slow evaporation of a volatile solvent, which enabled a systematic study over an exceptionally wide range of compositions. Different diffraction patterns as a function of PSiP concentration were observed in the USAXS images of the mixtures. At suitably low PSiP concentrations, the USAXS intensity profile was analyzed using the Percus-Yevick model by matching the contrast between the shell layer and IL, and the swollen structure of the shell and "effective diameter" of the PSiP were evaluated. This result confirms that under sufficiently low pressures below and near the liquid/crystal-threshold concentration, the studied PSiP can be well described using the "hard sphere" model in colloidal science. Above the threshold concentration, the PSiP forms higher-order structures. The analysis of diffraction patterns revealed structural changes from disorder to random hexagonal-closed-packing and then face-centered-cubic as the PSiP concentration increased. These results are discussed in terms of thermodynamically stable "hard" and/or "semi-soft" colloidal crystals, wherein the swollen layer of the concentrated polymer brush and its structure play an important role.
Collapse
Affiliation(s)
- Yohei Nakanishi
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Ryohei Ishige
- Department of Chemistry and Materials, Tokyo Institute of Technology, 2-12-1-E4-5 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Hiroki Ogawa
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Keita Sakakibara
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Kohji Ohno
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Takashi Morinaga
- Department of Creative Engineering, National Institute of Technology, Tsuruoka College, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Takaya Sato
- Department of Creative Engineering, National Institute of Technology, Tsuruoka College, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Toshiji Kanaya
- J-PARC, Material and Life Science Division, Institute of Material Structure Science, High Energy Accelerator Research Organization (KEK), 203-1 Shirakata, Tokai, Naka, Ibaraki 319-1106, Japan
| | - Yoshinobu Tsujii
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| |
Collapse
|
21
|
Kato T, Sato M, Shimamoto H, Uno K, Yokomachi K, Konishi Y, Kamitani K, Nishibori M, Ohta N, Ishige R, White KL, Otozawa N, Hirai T, Takahara A. Preparation of High-Density Polymer Brushes with a Multihelical Structure. Langmuir 2018; 34:3283-3288. [PMID: 29442517 DOI: 10.1021/acs.langmuir.7b04167] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
It is well-known that a mixture of isotactic and syndiotactic polymethyl methacrylate (PMMA) forms a stereocomplex consisting of a multihelical structure in which an isotactic chain is surrounded by a syndiotactic chain. Here, we report the basic structure of the stereocomplex formed when the syndiotactic PMMA chains are tethered to a silicon substrate and form a high-density polymer brush. The influence of geometric confinement was investigated by preparing the high-density polymer brushes on a flat and spherical substrate. In both cases, mixing the untethered isotactic PMMA with the grafted syndiotactic PMMA led to the formation of a stereocomplex with a multihelical structure. Static contact angle measurements showed a hindered surface mobility at the outermost surface of the polymer brush, indicating that the stereocomplex forms a crystalline structure. A syndiotactic polymer brush with substituted fluoroalkyl groups was prepared to increase the contrast for grazing incidence wide-angle X-ray diffraction (GIWAXD) measurements. The GIWAXD results verified that the stereocomplex forms a crystalline structure oriented perpendicular to the substrate with a relatively low degree of orientation.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Maiko Nishibori
- Faculty of Energy and Material Sciences , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute/SPring-8 , Sayo , Hyogo 679-5198 , Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering , Tokyo Institute of Technology , 2-12-1 O-okayama Meguro-ku, Tokyo 152-8552 , Japan
| | | | - Nobuyuki Otozawa
- Asahi Glass Co., Ltd. , 1150 Hazawa-cho , Kanagawa-ku Yokohama-shi , Kanagawa 221-8755 , Japan
| | | | | |
Collapse
|
22
|
Orita R, Franckevičius M, Vyšniauskas A, Gulbinas V, Sugiyama H, Uekusa H, Kanosue K, Ishige R, Ando S. Enhanced fluorescence of phthalimide compounds induced by the incorporation of electron-donating alicyclic amino groups. Phys Chem Chem Phys 2018; 20:16033-16044. [DOI: 10.1039/c8cp01999a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A significant difference in fluorescence properties between 3- and 4-substituted phthalimides demonstrates the formation of excited TICT and planar ICT states, respectively.
Collapse
Affiliation(s)
- Ryoji Orita
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | | | | | | | - Haruki Sugiyama
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Hidehiro Uekusa
- Department of Chemistry
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Kenta Kanosue
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8552
- Japan
| |
Collapse
|
23
|
Ando S, Sekiguchi K, Mizoroki M, Okada T, Ishige R. Anisotropic Linear and Volumetric Thermal-Expansion Behaviors of Self-Standing Polyimide Films Analyzed by Thermomechanical Analysis (TMA) and Optical Interferometry. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700354] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shinji Ando
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Ookayama 2-12-1-E4-5 Meguro-ku Tokyo 152-8552 Japan
| | - Kenji Sekiguchi
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Ookayama 2-12-1-E4-5 Meguro-ku Tokyo 152-8552 Japan
| | - Masashi Mizoroki
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Ookayama 2-12-1-E4-5 Meguro-ku Tokyo 152-8552 Japan
| | - Tomohiro Okada
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Ookayama 2-12-1-E4-5 Meguro-ku Tokyo 152-8552 Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering; Tokyo Institute of Technology; Ookayama 2-12-1-E4-5 Meguro-ku Tokyo 152-8552 Japan
| |
Collapse
|
24
|
Ishige R, Tanaka K, Ando S. In Situ Analysis of Chain Orientation Behavior in Thin Film Aromatic Polyimides by Variable Temperature pMAIRS during Thermal Imidization. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700370] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ryohei Ishige
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; E4-5, 2-12-1 Ookayama Meguro-ku Tokyo 152-8552 Japan
| | - Kazuyuki Tanaka
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; E4-5, 2-12-1 Ookayama Meguro-ku Tokyo 152-8552 Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering; School of Materials and Chemical Technology; Tokyo Institute of Technology; E4-5, 2-12-1 Ookayama Meguro-ku Tokyo 152-8552 Japan
| |
Collapse
|
25
|
Uchida S, Ishige R, Ando S. Enhancement of Thermal Diffusivity in Phase-Separated Bismaleimide/Poly(ether imide) Composite Films Containing Needle-Shaped ZnO Particles. Polymers (Basel) 2017; 9:polym9070263. [PMID: 30970939 PMCID: PMC6432426 DOI: 10.3390/polym9070263] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 06/25/2017] [Accepted: 06/27/2017] [Indexed: 11/30/2022] Open
Abstract
Phase-separated polymer blend composite films exhibiting high thermal diffusivity were prepared by blending a soluble polyimide (BPADA-MPD) and a bismaleimide (BMI) with needle-shaped zinc oxide (n-ZnO) particles followed by high-temperature curing at 250 °C. Images recorded with a field-emission scanning electron microscope (FE-SEM) equipped with wavelength-dispersive spectroscopy (WDS) demonstrated that the spontaneously separated phases in the composite films were aligned along the out-of-plane direction, and the n-ZnO particles were selectively incorporated into the BMI phase. The out-of-plane thermal diffusivity of the composite films was significantly higher than those of the previously reported composite films at lower filler contents. Based on wide-angle X-ray diffraction (WAXD) patterns and image analysis, the enhanced thermal diffusivity was attributed to the confinement of the anisotropically shaped particles and their nearly isotropic orientation in one phase of the composite films.
Collapse
Affiliation(s)
- Shoya Uchida
- Department of Chemistry and Material Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
| | - Ryohei Ishige
- Department of Chemistry and Material Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
| | - Shinji Ando
- Department of Chemistry and Material Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan.
| |
Collapse
|
26
|
Ishige R, Masuda T, Kozaki Y, Fujiwara E, Okada T, Ando S. Correction to Precise Analysis of Thermal Volume Expansion of Crystal Lattice for Fully Aromatic Crystalline Polyimides by X-ray Diffraction Method: Relationship between Molecular Structure and Linear/Volumetric Thermal Expansion. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00476] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Ishige R, Masuda T, Kozaki Y, Fujiwara E, Okada T, Ando S. Precise Analysis of Thermal Volume Expansion of Crystal Lattice for Fully Aromatic Crystalline Polyimides by X-ray Diffraction Method: Relationship between Molecular Structure and Linear/Volumetric Thermal Expansion. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00095] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryohei Ishige
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Toshiaki Masuda
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yukiko Kozaki
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Eisuke Fujiwara
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Tomohiro Okada
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shinji Ando
- Department of Chemical
Science
and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan
| |
Collapse
|
28
|
Uchida S, Ishige R, Takeichi T, Ando S. Promotion of Thermal Imidization of Semi-Aliphatic Polyimide Precursors by Incorporation of Polyethylene Glycol and Their Modified Solid Structures. J PHOTOPOLYM SCI TEC 2017. [DOI: 10.2494/photopolymer.30.139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shoya Uchida
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Tsutomu Takeichi
- Department of Environmental and Life Science, Toyohashi University of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
29
|
Uchida S, Murakami T, Iwamura T, Ishige R, Ando S. Enhanced thermal conductivity in immiscible polyimide blend composites with needle-shaped ZnO particles. RSC Adv 2017. [DOI: 10.1039/c7ra00760d] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel composite films exhibiting high thermal conductivity along the out-of-plane direction were prepared from two types of immiscible polyimides (PIs) and needle-shaped ZnO particles.
Collapse
Affiliation(s)
- Shoya Uchida
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Japan
| | - Tomoya Murakami
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Japan
| | - Takeru Iwamura
- Department of Chemistry and Energy Engineering
- Faculty of Engineering
- Tokyo City University
- Japan
| | - Ryohei Ishige
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Japan
| | - Shinji Ando
- Department of Chemical Science and Engineering
- Tokyo Institute of Technology
- Japan
| |
Collapse
|
30
|
Nojima S, Higaki Y, Ishige R, Kabayama H, Ohta N, Masunaga H, Hirai T, Kojio K, Takahara A. Crystallization-induced structure fluctuation of crystallized microdomain structure composed of strongly segregated crystalline-crystalline diblock copolymers. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
31
|
Ishige R, Ohta N, Ogawa H, Tokita M, Takahara A. Fully Liquid-Crystalline ABA Triblock Copolymer of Fluorinated Side-Chain Liquid-Crystalline A Block and Main-Chain Liquid-Crystalline B Block: Higher Order Structure in Bulk and Thin Film States. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00855] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | - Noboru Ohta
- Japan Synchrotron Radiation Research
Institute (JASRI/SPring-8), Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Hiroki Ogawa
- Japan Synchrotron Radiation Research
Institute (JASRI/SPring-8), Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Masatoshi Tokita
- Department of Chemical Science and Engineering,
School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama,
Meguro-ku, Tokyo 152-8552, Japan
| | | |
Collapse
|
32
|
Kido M, Nojima S, Ishige R, White KL, Kamitani K, Ohta N, Hirai T, Takahara A. Effect of molecular weight on microcrystalline structure formation in polymer with perylenediimide side chain. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/polb.24115] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Makoto Kido
- Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
| | - Shiki Nojima
- Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
| | - Ryohei Ishige
- Institute for Materials Chemistry and Engineering, Kyushu University; 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Kevin L. White
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
| | - Kazutaka Kamitani
- Institute for Materials Chemistry and Engineering, Kyushu University; 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute/SPring-8; Sayo Hyogo 679-5198 Japan
| | - Tomoyasu Hirai
- Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering, Kyushu University; 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
| | - Atsushi Takahara
- Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
- Institute for Materials Chemistry and Engineering, Kyushu University; 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University; 744 Motooka, Nishi-Ku Fukuoka 819-0395 Japan
| |
Collapse
|
33
|
Ishige R, Williams GA, Higaki Y, Ohta N, Sato M, Takahara A, Guan Z. In situ ultra-small-angle X-ray scattering study under uniaxial stretching of colloidal crystals prepared by silica nanoparticles bearing hydrogen-bonding polymer grafts. IUCrJ 2016; 3:211-8. [PMID: 27158507 PMCID: PMC4856143 DOI: 10.1107/s205225251600556x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 04/04/2016] [Indexed: 06/05/2023]
Abstract
A molded film of single-component polymer-grafted nanoparticles (SPNP), consisting of a spherical silica core and densely grafted polymer chains bearing hydrogen-bonding side groups capable of physical crosslinking, was investigated by in situ ultra-small-angle X-ray scattering (USAXS) measurement during a uniaxial stretching process. Static USAXS revealed that the molded SPNP formed a highly oriented twinned face-centered cubic (f.c.c.) lattice structure with the [11-1] plane aligned nearly parallel to the film surface in the initial state. Structural analysis of in situ USAXS using a model of uniaxial deformation induced by rearrangement of the nanoparticles revealed that the f.c.c. lattice was distorted in the stretching direction in proportion to the macroscopic strain until the strain reached 35%, and subsequently changed into other f.c.c. lattices with different orientations. The lattice distortion and structural transition behavior corresponded well to the elastic and plastic deformation regimes, respectively, observed in the stress-strain curve. The attractive interaction of the hydrogen bond is considered to form only at the top surface of the shell and then plays an effective role in cross-linking between nanoparticles. The rearrangement mechanism of the nanoparticles is well accounted for by a strong repulsive interaction between the densely grafted polymer shells of neighboring particles.
Collapse
Affiliation(s)
- Ryohei Ishige
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Gregory A. Williams
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA 92697, USA
| | - Yuji Higaki
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Masugu Sato
- Japan Synchrotron Radiation Research Institute (JASRI/SPring-8), Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Zhibin Guan
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA 92697, USA
| |
Collapse
|
34
|
Sato M, Kato T, Ohishi T, Ishige R, Ohta N, White KL, Hirai T, Takahara A. Precise Synthesis of Poly(methyl methacrylate) Brush with Well-Controlled Stereoregularity Using a Surface-Initiated Living Anionic Polymerization Method. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02773] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | | | - Noboru Ohta
- Japan Synchrotron
Radiation Research Institute/SPring-8, Sayo, Hyogo 679-5198, Japan
| | | | | | | |
Collapse
|
35
|
Affiliation(s)
- Tomohiro Okada
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Ryohei Ishige
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| | - Shinji Ando
- Department of Chemical Science and Engineering, Tokyo Institute of Technology
| |
Collapse
|
36
|
Williams GA, Ishige R, Cromwell OR, Chung J, Takahara A, Guan Z. Mechanically Robust and Self-Healable Superlattice Nanocomposites by Self-Assembly of Single-Component "Sticky" Polymer-Grafted Nanoparticles. Adv Mater 2015; 27:3934-3941. [PMID: 26017026 DOI: 10.1002/adma.201500927] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 04/25/2015] [Indexed: 06/04/2023]
Abstract
A simple, scalable synthesis of mechanically robust and self-healable superlattice nanocomposites is achieved through self-assembly of single-component "sticky" polymer-grafted nanoparticles. The multi-valent hydrogen-bonding interactions between the nanoparticles provide strong cohesive energy, binding the nanoparticles into strong and tough materials. Furthermore, the dynamic hydrogen-bonding interactions afford the formation of highly dynamic, self-healing, and mechanochromic nanocomposite materials in the bulk.
Collapse
Affiliation(s)
- Gregory A Williams
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA, 92697, USA
| | - Ryohei Ishige
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Olivia R Cromwell
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA, 92697, USA
| | - Jaeyoon Chung
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA, 92697, USA
| | - Atsushi Takahara
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Zhibin Guan
- Department of Chemistry, 1102 Natural Sciences 2, University of California, Irvine, CA, 92697, USA
| |
Collapse
|
37
|
Ishige R, Higuchi T, Jiang X, Mita K, Ogawa H, Yokoyama H, Takahara A, Jinnai H. Structural Analysis of Microphase Separated Interface in an ABC-Type Triblock Terpolymer by Combining Methods of Synchrotron-Radiation Grazing Incidence Small-Angle X-ray Scattering and Electron Microtomography. Macromolecules 2015. [DOI: 10.1021/ma502596a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Takeshi Higuchi
- Takahara
Soft Interfaces Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology Agency (JST), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Xi Jiang
- Takahara
Soft Interfaces Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology Agency (JST), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazuki Mita
- Sodegaura
Center, Mitsui Chemicals, Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan
| | - Hiroki Ogawa
- Japan Synchrotron
Radiation Research Institute (JASRI/SPring-8), Sayo, Hyogo 679-5198, Japan
| | - Hideaki Yokoyama
- Department
of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwano-ha, Kashiwa, Chiba 277-8561, Japan
| | - Atsushi Takahara
- Takahara
Soft Interfaces Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology Agency (JST), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Hiroshi Jinnai
- Takahara
Soft Interfaces Project, Exploratory Research for Advanced Technology
(ERATO), Japan Science and Technology Agency (JST), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| |
Collapse
|
38
|
Huang Y, Ishige R, Tsujii Y, Ohno K. Synthesis of iron oxide rods coated with polymer brushes and control of their assembly in thin films. Langmuir 2015; 31:1172-1179. [PMID: 25552325 DOI: 10.1021/la504429c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We investigated the surface-initiated atom transfer radical polymerization (SI-ATRP) of methyl methacrylate (MMA) using monodisperse rod-type particles of iron oxide, β-FeOOH. The slow hydrolysis of iron(III) chloride yielded monodisperse β-FeOOH rods with an average length-to-width ratio, L/W, of 6 (L = 210 nm and W = 35 nm on average). The surfaces of the β-FeOOH rods were modified with a triethoxysilane derivative as an ATRP-initiating site, namely, (2-bromo-2-methyl)propionyloxypropyl triethoxysilane. The SI-ATRP of MMA, mediated by a copper complex, was performed using the initiator-coated β-FeOOH rods in the presence of a "sacrificial" free initiator. Well-defined poly(methyl methacrylate) (PMMA) brushes with molecular weights of up to 700,000 could be grafted on the β-FeOOH rods with a surface density as high as 0.3 chains/nm(2). The resultant polymer-brush-afforded hybrid rods exhibited high dispersibility in various solvents for PMMA without forming aggregates. Thin films were prepared by dip-coating from a suspension of the hybrid rods, and the rods were oriented in a specific direction in the films. The arrangement of the rods could be controlled by varying the chain length of the polymer brush and the withdrawal speed during the dip-coating process.
Collapse
Affiliation(s)
- Yun Huang
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | | | | | | |
Collapse
|
39
|
Hsieh YT, Ishige R, Higaki Y, Woo EM, Takahara A. Microscopy and microbeam X-ray analyses in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with amorphous poly(vinyl acetate). POLYMER 2014. [DOI: 10.1016/j.polymer.2014.10.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
40
|
Ishige R, Shinohara T, White KL, Meskini A, Raihane M, Takahara A, Ameduri B. Unique Difference in Transition Temperature of Two Similar Fluorinated Side Chain Polymers Forming Hexatic Smectic Phase: Poly{2-(perfluorooctyl)ethyl acrylate} and Poly{2-(perfluorooctyl)ethyl vinyl ether}. Macromolecules 2014. [DOI: 10.1021/ma500503z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | | | - Ahmed Meskini
- Organometallic and Macromolecular Chemistry-Composite
Materials Laboratory − Cadi Ayyad University-Faculté des Sciences et Techniques, Avenue Abdelkrim Khattabi, BP 549, 40000 Marrakech, Morocco
| | - Mustapha Raihane
- Organometallic and Macromolecular Chemistry-Composite
Materials Laboratory − Cadi Ayyad University-Faculté des Sciences et Techniques, Avenue Abdelkrim Khattabi, BP 549, 40000 Marrakech, Morocco
| | - Atsushi Takahara
- Exploratory Research for Advanced Technology
(ERATO), Takahara Soft Interfaces Project, Japan Science and Technology Agency (JST), 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Bruno Ameduri
- Engineering
and Macromolecular Architectures, Institut Charles Gerhardt, UMR (CNRS)
5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue Ecole Normale, 34296 Montpellier Cedex 5, France
| |
Collapse
|
41
|
Wong M, Ishige R, White KL, Li P, Kim D, Krishnamoorti R, Gunther R, Higuchi T, Jinnai H, Takahara A, Nishimura R, Sue HJ. Large-scale self-assembled zirconium phosphate smectic layers via a simple spray-coating process. Nat Commun 2014; 5:3589. [DOI: 10.1038/ncomms4589] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 03/07/2014] [Indexed: 11/10/2022] Open
|
42
|
Wu H, Cao Y, Ishige R, Higaki Y, Hoshino T, Ohta N, Takahara A. Confinement-Induced Crystal Growth in One-Dimensional Isotactic Polystyrene Nanorod Arrays. ACS Macro Lett 2013; 2:414-418. [PMID: 35581848 DOI: 10.1021/mz400136d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This work demonstrates the anomalous crystal growth of isotactic polystyrene (iPS) in nanorod arrays with different rod sizes. At the bottom of the nanorods, the crystals in bulk film grow into nanorods along either the [110] or [100] direction parallel to the rod axis. On the top side of the nanorods, the polymer exhibits different orientations corresponding to weak or strong confinement. In the weaker confinement (bigger nanorods of 300 nm diameter), the crystals grow with the [100] direction along the nanorod, which is similar to the crystals developed in the radial of spherulite. In the stronger confinement (smaller nanorods of 65 nm diameter), the splaying of crystals in the rod is significantly suppressed, and the preferred growth direction of iPS crystals is kept in either the [110] or [100] direction. The precise control of polymer crystal orientation and crystallinity at a local scale opens important perspectives for the design of one-dimensional nanomaterials whose performance depends on the anisotropic crystal properties.
Collapse
Affiliation(s)
- Hui Wu
- Japan Science and
Technology
Agency, ERATO, Takahara Soft Interfaces Project, Fukuoka 819-0395, Japan
| | - Yan Cao
- Japan Science and
Technology
Agency, ERATO, Takahara Soft Interfaces Project, Fukuoka 819-0395, Japan
| | - Ryohei Ishige
- Institute for Materials Chemistry
and Engineering, Kyushu University, Fukuoka
819-0395, Japan
| | - Yuji Higaki
- Institute for Materials Chemistry
and Engineering, Kyushu University, Fukuoka
819-0395, Japan
- International Institute
for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Taiki Hoshino
- Japan Science and
Technology
Agency, ERATO, Takahara Soft Interfaces Project, Fukuoka 819-0395, Japan
| | - Noboru Ohta
- Japan Synchrotron Radiation Research Institute/SPring-8, Hyogo 679-5198,
Japan
| | - Atsushi Takahara
- Japan Science and
Technology
Agency, ERATO, Takahara Soft Interfaces Project, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry
and Engineering, Kyushu University, Fukuoka
819-0395, Japan
- International Institute
for Carbon-Neutral
Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| |
Collapse
|
43
|
Shoji Y, Ishige R, Higashihara T, Morikawa J, Hashimoto T, Takahara A, Watanabe J, Ueda M. Cross-Linked Liquid Crystalline Polyimides with Siloxane Units: Their Morphology and Thermal Diffusivity. Macromolecules 2013. [DOI: 10.1021/ma302486s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Shoji
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
| | - Ryohei Ishige
- Institute for Materials Chemistry
and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tomoya Higashihara
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8, Honcho, Kawaguchi,
Saitama 332-0012, Japan
| | - Junko Morikawa
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
| | - Toshimasa Hashimoto
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
| | - Atsushi Takahara
- Institute for Materials Chemistry
and Engineering, Kyushu University, 744
Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Junji Watanabe
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
| | - Mitsuru Ueda
- Department
of Organic and Polymeric
Materials, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 H-120, O-okayama,
Meguro-Ku, Tokyo 152-8550, Japan
| |
Collapse
|
44
|
Liu P, White KL, Sugiyama H, Xi J, Higuchi T, Hoshino T, Ishige R, Jinnai H, Takahara A, Sue HJ. Influence of Trace Amount of Well-Dispersed Carbon Nanotubes on Structural Development and Tensile Properties of Polypropylene. Macromolecules 2013. [DOI: 10.1021/ma3020323] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Peng Liu
- Polymer Technology Center, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Kevin L. White
- Polymer Technology Center, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | | | - Jiang Xi
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Takeshi Higuchi
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Taiki Hoshino
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Ryohei Ishige
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Hiroshi Jinnai
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Atsushi Takahara
- Institute
for Materials Chemistry
and Engineering, Kyushu University, Fukuoka,
Japan
| | - Hung-Jue Sue
- Polymer Technology Center, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843, United States
| |
Collapse
|
45
|
Oniki Y, Suzuki K, Higaki Y, Ishige R, Ohta N, Takahara A. Molecular design of environmentally benign segmented polyurethane(urea)s: effect of the hard segment component on the molecular aggregation states and biodegradation behavior. Polym Chem 2013. [DOI: 10.1039/c3py00172e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Koga M, Ishige R, Sato K, Ishii T, Kang S, Sakajiri K, Watanabe J, Tokita M. Well-Ordered Lamellar Microphase-Separated Morphology of an ABA Triblock Copolymer Containing a Main-Chain Liquid Crystalline Polyester as the Middle Segment 2: Influence of Amorphous Segment Molecular Weight. Macromolecules 2012. [DOI: 10.1021/ma3015307] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maito Koga
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Ryohei Ishige
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Kazunori Sato
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Toshinari Ishii
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Sungmin Kang
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Koichi Sakajiri
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Junji Watanabe
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| | - Masatoshi Tokita
- Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Ookayama, Meguro-ku,
Tokyo 152-8552, Japan
| |
Collapse
|
47
|
Uchimura M, Ishige R, Shigeta M, Arakawa Y, Niko Y, Watanabe J, Konishi GI. Synthesis and properties of thermotropic liquid-crystalline polyesters containing 9,10-diphenylanthracene moiety in the main chain. Res Chem Intermed 2012. [DOI: 10.1007/s11164-012-0658-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
48
|
Ishige R, Shoji Y, Higashihara T, Ueda M, Watanabe J. Characteristic smectic structures of main-chain liquid-crystalline polyimides driven by a microphase separation between aromatic imide mesogen and a siloxane spacer. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c1jm14566e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Kang S, Ishige R, Lee EW, Tokita M, Watanabe J. Banana-shaped molecular architecture: Formation of large columns composed of two concentrically enclosed layers. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34051h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
50
|
Arakawa Y, Nakajima S, Ishige R, Uchimura M, Kang S, Konishi GI, Watanabe J. Synthesis of diphenyl-diacetylene-based nematic liquid crystals and their high birefringence properties. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm16002a] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|