2007 Fiscal Year Final Research Report Summary
New environment-conscious material with low-frequency-sound absorption and comfortable sound characteristics using fiber-reinforced organic hybrid
| Project/Area Number |
16206066
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 |
SUMITA Masao Tokyo Institute of Technology, Graduate School of Engineering, Professor (30016654)
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| Co-Investigator(Kenkyū-buntansha) |
ASAI Shigeo Tokyo Institute of Technology, Graduate School of Engineering, Associate Professor (80212463)
TOMINAGA Yoichi Tokyo University of Agriculture and Technology, Department of Organic and Polymer Materials Chemistry, Instructor (30323786)
FURUHATA Kenichi Tokyo Institute of Technology, Graduate School of Engineering, Associate Professor (10016587)
NAKAMURA Kentaro Tokyo Institute of Technology, Precision & Intelligence Laboratory, Associate Professor (20242315)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Organic Hybrid / CPE / DBS / ACM / TXY / Inorganic filler / Carbon Particle(CB, KEC) / Vapor-grown Carbon Fiber(VGCF) / Damping characteristic / Comfortable sound property |
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| Research Abstract |
We investigated the relationship between comfortable sound properties and damping characteristics of organic hybrid.
In order to obtain organic hybrid with higher damping performance, we studied on factors determining damping performance of organic hybrid and influence on an addition of inorganic fillers such as carbon and silica particles and carbon fiber.
It was found damping performance is influenced by amount, intensity and structure of interaction between polymer and low molecule, besides an energy loss by polymer and low molecule themselves.
Addition of inorganic filler improved damping performance, resulting from high energy loss at the interface between filler and matrix. The increase in damping performance by addition of inorganic filler decreased with increasing content of low molecule. This is because an applied mechanical energy becomes difficult to transmit to the filler surface by fluidity of low molecule at higher content of low molecule. However, further addition of inorganic filler recovered transmission of mechanical energy to a filler surface, resulting in an increase in damping performance.
For investigation of comfortable sound properties, we estimated a transfer function between input signal and output sound of a speaker lined with and without organic hybrid. By lining with organic hybrid, we observed a change in a transfer function at certain frequency. We supposed this change in a transfer function influenced on comfortable sound properties.
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Research Products
(20 results)
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[Journal Article] Low-Frequency Sound Absorption of Organic Hybrid Comprised of Chlorinated Polyethylene and N, N'-dicyclohexy1-2-benzothiazolyl Sulfenamide2006
Author(s)
Shuichi, Akasaka, Taiki, Tobusawa, Yoichi, Tominaga, Shigeo, Asai, Masao, Sumita
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Journal Title
Journal of Applied polymer Science 99
Pages: 2878-2884
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Viscoelasticity and morphology of an organic hybrid of chlorinated polyethylene and N, N'-dicyclohexyl-2-benzothiazolyl sulfenamide.2005
Author(s)
Shuichi, Akasaka, Toshiki, Shimura, Suguru, Sasaki, Yoichi, Tominaga, Shigeo, Asai, Masao, Sumita
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Journal Title
Composite Interface 12
Pages: 637-653
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effect of number of functional group in low molecule on vibration damping characteristics of Acrylic rubber/phenolic low molecule blends2007
Author(s)
Shuichi, Akasaka, Naohisa, Sato, Yang, Xingang, Shige, Asai, Masao, Sumita, Po-Da, Hong
Organizer
20th Elastomers Symposium of the Society of Rubber Industry Japan
Place of Presentation
Kyoto
Year and Date
20071206-07
Description
「研究成果報告書概要(欧文)」より
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