High Thermal Conductive Resin Composites with Controlled Nanostructures for Electric Devices
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概要
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We studied certain kinds of diepoxy monomers, with so-called `mesogens- molecular groups that cause self-ordering - and cured them with appropriate curing agents. Their thermal conductivities were up to 5 times higher than those of conventional epoxy resins. We believe that the mesogens formed nanoscopic high-order structures and the structures formed mezoscopic structures, which were covalently bound together, suppressing phonon scattering. Such resin system is therefore considered to be a kind of polymer-polymer composite with controlled nanostructures. We confirmed the existence of crystal-like structures in the epoxy resins directly by transmission electron microscope (TEM) observation. We also observed mezoscopic structures in the resins with an atomic force microscope (AFM). The results suggest a novel method to improve the thermal conductivities of insulating resins themselves by controlling the nanoscopic high-order structures.Subsequently, laminates were prepared with the developed resin composite consisting of a kind of epoxy resins with mesogens and ceramic fillers, and tested as a part of a feasibility study. The thermal conductivities of the test pieces were more than 10 times that of commercial FR-4 laminates. This result shows that controlling the nanoscopic high-order structure of the resins is effective in improving the thermal conductivity of resin composites, and the heat dissipation of electric devices as well.
- 2006-11-01
著者
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Takahashi Hiroyuki
Department Of Pathology The Jikei University School Of Medicine
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FUKUSHIMA Keiji
Department of Electronic Materials and Devices Research, Materials Research Laboratory, Hitachi, Ltd
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TAKEZAWA Yoshitaka
Department of Electronic Materials and Devices Research, Materials Research Laboratory, Hitachi, Ltd
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KAWAHIRA Tetsuya
Research and Development Div., Shin-Kobe Electric Machinery Co., Ltd.
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ITOH Makoto
Research and Development Div., Shin-Kobe Electric Machinery Co., Ltd.
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KANAI Jun
Research and Development Div., Shin-Kobe Electric Machinery Co., Ltd.
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Kanai Jun
Research And Development Div. Shin-kobe Electric Machinery Co. Ltd.
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Takezawa Yoshitaka
Department Of Electronic Materials And Devices Research Materials Research Laboratory Hitachi Ltd.
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Fukushima Kenji
Department Of Basic Biology The Graduate University For Advanced Studies
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Fukushima Keiji
Department Of Applied Chemistry Faculty Of Engineering Kumamoto University
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Fukushima Keiji
Department Of Electronic Materials And Devices Research Materials Research Laboratory Hitachi Ltd.
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Kawahira Tetsuya
Research And Development Div. Shin-kobe Electric Machinery Co. Ltd.
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Itoh Makoto
Research And Development Div. Shin-kobe Electric Machinery Co. Ltd.
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Takahashi Hiroyuki
Department Of Obstetrics And Gynecology Tottori University School Of Medicine
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Takahashi Hiroyuki
Department Of By Preclinical Dmpk Tsukuba Research Institute Banyu Pharmaceutical Co. Ltd
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Takahashi Hiroyuki
Department Of Applied Chemistry Faculty Of Science And Technology Keio University
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