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Miwa Y, Yamamoto K, Tanabe T, Okamoto S, Sakaguchi M, Sakai M, Shimada S. An ESR Spin-Label Study on Molecular Mobility in the Interface between Microphases of a Diblock Copolymer: Effects of Admixture of Homopolymers That Are Miscible with One of the Blocks. J Phys Chem B 2006; 110:4073-82. [PMID: 16509699 DOI: 10.1021/jp056502m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecular mobility in the interfacial region of a microphase-separated structure was studied in binary mixtures of AB-type diblock copolymers and homopolymers (miscible with only A) by the spin-label technique. In this study, we prepared (a) binary blends of polystyrene-block-poly(methyl acrylate) (PS-block-PMA) and homopolymer poly(cyclohexyl acrylate)'s having the number-averaged molecular weight (Mn) of 1000 (PCHA-S) and (b) having the Mn of 17300 (PCHA-L), and (c) binary mixtures of the PS-block-PMA and homopolymer PS with the Mn of 900 (PS-1). Emphasis was placed on effects of the molecular weight and the miscibility of added homopolymers on the mobility in the interfacial region of the microphase separation. Selective incorporation of the added PCHA-S, PCHA-L, and PS-1 into the PS phase of the PS-block-PMA was confirmed by modulated-temperature differential scanning calorimetry (MDSC) measurement as a decrease in the glass transition temperature of the PS phase. Moreover, the MDSC and small-angle X-ray scattering (SAXS) measurements suggested that the spatial distributions of the PCHA-S and PS-1 in the PS phase were relatively uniform because of their small Mn. On the other hand, the distribution of the PCHA-L in the PS phase was somewhat heterogeneous because of the large Mn of the PCHA-L. The spin-label at the junction point of the PS-block-PMA allowed us to estimate the mobility in the interfacial region of the microphase separation. Influence of the PCHA-S and PCHA-L on the mobility in the interfacial region was negligible even though the relatively uniform distribution of the PCHA-S in the PS phase was suggested by the SAXS and MDSC. More uniform distribution of the PS-1 than that of the PCHA-S in the PS phase was suggested by the SAXS, and the mobility in the interfacial region was slightly enhanced by the addition of the PS-1. However, the mobility was almost constant against an increase in the PS-1. The PS-1 was considered to be penetrated into the interfacial region and activated the mobility, but the fraction of the PS-1 in the interfacial region was constant irrespective of the blended amount of the PS-1. These results suggest that effects of homopolymers on the mobility in the interface are significantly related to their spatial distribution in the host phase.
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Affiliation(s)
- Yohei Miwa
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Miwa Y, Sugino Y, Yamamoto K, Tanabe T, Sakaguchi M, Sakai M, Shimada S. Electron Spin Resonance Study on Dynamic Heterogeneity in Miscible Blend of Poly(cyclohexyl methacrylate) and Poly(cyclohexyl acrylate). Macromolecules 2004. [DOI: 10.1021/ma049026r] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yohei Miwa
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Yusuke Sugino
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Katsuhiro Yamamoto
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Takuya Tanabe
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Masato Sakaguchi
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Masahiro Sakai
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
| | - Shigetaka Shimada
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama, 484-8503, Japan; and Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan
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Miwa Y, Tanida K, Yamamoto K, Okamoto S, Sakaguchi M, Sakai M, Makita S, Sakurai S, Shimada S. Dynamic Heterogeneity in Interfacial Region of Microphase-Separated Polystyrene-block-poly(methyl acrylate) Studied by the ESR Spin-Label Technique. Macromolecules 2004. [DOI: 10.1021/ma035089i] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yohei Miwa
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kenichi Tanida
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Katsuhiro Yamamoto
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shigeru Okamoto
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masato Sakaguchi
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masahiro Sakai
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Seiji Makita
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shinichi Sakurai
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shigetaka Shimada
- Department of Materials Science & Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan; Nagoya Keizai University, 61 Uchikubo, Inuyama 484-8503, Japan; Research Center for Molecular-Scale Nanoscience, Institute for Molecular Science, 38 Nishigo-Naka, Myodaiji, Okazaki 444-8585, Japan; and Department of Polymer Science & Engneering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Shimada S, Suzuki A, Sakaguchi M, Hori Y. Molecular Motion of Chain End Peroxy Radicals of Polyethylene Molecules Tethered on a Fresh Surface of Poly(tetrafluoroethylene). Macromolecules 1996. [DOI: 10.1021/ma951139a] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shigetaka Shimada
- Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, and Ichimura Gakuen College, 61 Uchikubo, Inuyama 484, Japan
| | - Akihito Suzuki
- Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, and Ichimura Gakuen College, 61 Uchikubo, Inuyama 484, Japan
| | - Masato Sakaguchi
- Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, and Ichimura Gakuen College, 61 Uchikubo, Inuyama 484, Japan
| | - Yasuro Hori
- Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, and Ichimura Gakuen College, 61 Uchikubo, Inuyama 484, Japan
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