Hiromi Ito
Mitsubishi
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Featured researches published by Hiromi Ito.
Polymer | 2000
Kenji Mimura; Hiromi Ito; Hirofumi Fujioka
Abstract In order to improve both the heat resistance and the toughness of cured epoxy resins, polyethersulfone (PES) was added to a biphenyl-type epoxy resin. The dispersion state of the PES in the epoxy resin was controlled by changing the molding temperature, and the effect of the morphologies on the heat resistance and toughness of the cured resins was investigated. In the resin with a homogeneous phase morphology, the glass transition temperature (Tg) of the resin containing 10xa0wt% PES increased about 20°C, and the value of the fracture toughness also increased about 60% more than that of the unmodified resin. This is attributed to the formation of the semi-interpenetrating polymer networks (semi-IPNs) composed of the epoxy network and linear PES. On the resin with phase separation structure, a significant increase in toughness was obtained only when the PES formed a continuous phase morphology. However, higher PES content is required to form the co-continuous phase morphology, which causes the increase in the viscosity of the resin. In addition, the Tg of this system was equal to or only slightly higher than that of the unmodified resin.
Archive | 1988
Hiromi Ito; Ichiro Takahashi; Hirozoh Kanegae
Archive | 2006
Hiromi Ito; Osamu Yashiro
Archive | 1996
Hiromi Ito; Takumi Kikuchi; Hirofumi Fujioka; Hirozoh Kanegae; Yoshifumi Itabashi; Fumio Nogami
Archive | 1997
Hiromi Ito; Takumi Kikuchi; Hirofumi Fujioka; Hirozoh Kanegae; Yoshifumi Itabashi; Fumio Nogami
Archive | 2006
Hiromi Ito; Naoshi Yamada; Kei Yamamoto; Hirofumi Fujioka; Takumi Kikuchi; Osamu Yashiro
Archive | 1992
Hiromi Ito; Ichiro Takahashi
Archive | 1989
Hiromi Ito; Ichiro Takahashi
Archive | 1996
Hiromi Ito; Kenji Mimura; Hirofumi Fujioka; Etsuro Tomonaga; Hiroshi Aoki; Hiroyuki Hama
Archive | 1993
Hirofumi Fujioka; Hiromi Ito; Yuzo Kanegae; Masakazu Murayama; 浩美 伊藤; 雅一 村山; 弘文 藤岡; 裕三 鐘ケ江