Nanosize Effects in Mechanical Properties of Nanotube Dispersed Composites
| Project/Area Number |
18560665
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SHIOYA Masatoshi Tokyo Institute of Technology, Graduate School of Science and Engineering, Associate Professor (10196363)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,780,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2006: ¥3,000,000 (Direct Cost: ¥3,000,000)
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| Keywords | Mechanical properties / Fracture toughness / Small-angle X-ray scattering / Synchrotron radiation / Craze / Composite material / Carbon nanotube / Vapor grown carbon fiber / 破壊靱性 / 放射光 / カーボンブラック / ポリエチレンテレフタラート |
|---|
| Research Abstract |
In recent years an increasing number of studies have been published reporting mechanical properties of polymers added with carbon nanotubes (CNT). The addition of CNT does not necessarily improve the mechanical properties of polymers. The diversity of experimental results comes from the creation of defects due to aggregation of CNT and utilization of different specimen geometries, in addition to the difference in the CNT/polymer interaction depending on the kinds of polymers and the surface state of CNT. In the present study, time-resolved small-angle X-ray scattering measurements have been conducted using synchrotron radiation during deformation and fracture of processes of polymers added with CNT, carbon black (CB) and vapor grown carbon fiber. The formation and evolution of the precursory structure of fracture, i. e. crazes, have been investigated to clarify the essential effects of CNT exerted by their high strength, high aspect ratio and nanosize. As compared with CB, CNT showed larger effects to improve the fracture toughness of polymers. It was obtained that CB increases the number of sites where the crazes form whereas CNT increases the energy needed for craze growth due to their particular properties and geometries. The surface-notched films showed more significant effects of CNT addition as compared with the side-notched films. The essential work of fracture method and the finite element analysis were employed to rationalize these results. It was found that the surface-notched films have larger fraction of plastic deformation zone as compared with the side-notched films and the effect of the CNT addition to increase the plastic work of fracture is emphasized with the surface-notched films. In summary, the present study elucidated the essential effects of CNT addition exerted due to their particular properties and geometries, and suggested the material geometries with which the effects of CNT addition arise most effectively.
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Report
(3 results)
Research Products
(43 results)
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[Journal Article] Small-angle X-ray Scattering Study on Tensile Fracture Process of Poly(ethylene terephthalate) Fiber2008
Author(s)
M., Shioya, T., Kawazoe, R., Okazaki, T., Sue, S. Sakurai, K., Yamamoto, T., Kikutani
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Journal Title
Macromolecules (In press)
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Journal Article] Structure Change of PET Fiber during Tensile Deformation up to Fracture2007
Author(s)
M., Shioya, T., Kawazoe, R., Okazaki, T., Suei, J., Kojima, S., Sakurai, K., Yamamoto, T., Kikutani
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Journal Title
Photon Factory Activity Report 2006 Vol. #24, Part B
Pages: 105-105
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Journal Article] Detection of Crazes in CNT/PET Composites under Tensile Deformation2007
Author(s)
M., Shioya, H., Kobayashi, T., Tanaka, T., Irisawa, S., Sakurai, K., Yamamoto
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Journal Title
Photon Factory Activity Report 2006 Vol. #24, Part B
Pages: 148-148
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] A Comparative Study of Fracture Behavior between Carbon Black/Poly(ethylene terephthalate) and Multiwalled Carbon Nanotube/Poly(ethylene terephthalate) Composite Films2007
Author(s)
H., Kobayashi, M., Shioya, T., Tanaka, T., Irisawa, S., Sakurai, K., Yamamoto
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Journal Title
Journal of Applied Polymer Science Vol. 106
Pages: 152-160
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Small-angle X-ray Scattering of Long-period Structures Forming Bundles2006
Author(s)
M., Shioya, T., Kawazoe, J., Kojima, S., Sakurai, K., Yamamoto, T. K., ikutani
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Journal Title
Polymer Vol. 47
Pages: 3616-3628
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Control of Diameter, Morphology, and Structure of PVDF Nanofiber Fabricated by Electrospray Deposition2006
Author(s)
M., Nasir, H., Matsumoto, T., Danno, M., Minagawa, T., Irisawa, M., Shioya, A., Tanioka
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Journal Title
Journal of Polymer Science : Part B Vol. 44
Pages: 779-786
Description
「研究成果報告書概要(欧文)」より
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