Toshikazu Umemura
Mitsubishi
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Publication
Featured researches published by Toshikazu Umemura.
Polymers & Polymer Composites | 2008
Machiko Mizoguchi; Toshikazu Umemura; Susumu Takasima; Shinya Otsuki; Bin Yang; Takashi Kuriyama; Yew Wei Leong; Hiroyuki Hamada
The microstructure (including the morphology, fibre length, and fibre orientation) of injection moulded glass fibre reinforced polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) blend was investigated. Three grades of commercially available surface treated glass fibres were used; each grade received a treatment that was specially formulated and optimized to enhance the affinity of the glass fibre surface to PC, ABS or both PC and ABS phases. Morphological evaluation confirms that the glass fibres had a preferential affinity to a particular resin depending on the type of surface treatment applied. This preferential affinity could also be detected through the difference in fibre length distribution in the specimens, although their mean fibre lengths and fibre orientations were quite similar. Flexural modulus, flexural strength and impact strength were all affected by differences in the distribution of fibre lengths. It was also discovered that the resin flowed faster than the glass fibres, especially at the core of the mouldings.
Polymers & Polymer Composites | 2008
Toshikazu Umemura; S. Takashima; Masaya Kotaki; Hiroyuki Hamada
The effects of PC-oligomer addition on the internal morphology and mechanical properties of injection mouldings of polycarbonate (PC)/Acrylonitrilebutadiene-styrene (ABS) blends were investigated. Incorporating PC-oligomer into PC/ABS blends caused a significant improvement in strain at break under tensile loading without sacrificing tensile modulus and strength. Highly elongated ABS phases along the flow direction were observed in the blend with PC-oligomer.
Archive | 1991
Masanori Sakurai; Junichi Miyawaki; Toshikazu Umemura; Akiyoshi Shibata
Archive | 1990
Shuji Tsukahara; Toshikazu Umemura; Kazuyoshi Ichise
Macromolecules | 2008
Thontree Kongkhlang; Masaya Kotaki; Yasushi Kousaka; Toshikazu Umemura; Daigo Nakaya; Suwabun Chirachanchai
Polymer | 2008
Thontree Kongkhlang; Yasushi Kousaka; Toshikazu Umemura; Daigo Nakaya; Wandee Thuamthong; Yupin Pattamamongkolchai; Suwabun Chirachanchai
Archive | 1980
Akitoshi Sugio; Kazuyoshi Taka; Akira Amemiya; Tomotaka Furusawa; Mutsuhiko Takeda; Katsumasa Tanaka; Toshikazu Umemura; Yoshihiro Ono
Archive | 1989
Shigeo Kondoh; Toshikazu Umemura
Archive | 1988
Toshikazu Umemura; Kenji Maeda; Yutaka Kojima; Toshiaki Izumida; Kou Tanabe
Archive | 1976
Akitoshi Sugio; Yoshiharu Ohtsuki; Toshikazu Umemura