Kazunori Kataoka
University of Tokyo
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Featured researches published by Kazunori Kataoka.
Polymer Degradation and Stability | 2003
Tetsuto Kajiyama; Tetsushi Taguchi; Hisatoshi Kobayashi; Kazunori Kataoka; Junzo Tanaka
Abstract Poly(malic acid) (PMA) is a biodegradable and bioabsorbable water-soluble polymer. In order to apply this compound in the biomedical field, many researchers have investigated the synthesis of PMA with high molecular weight by polymerization methods such as ring-opening and direct polycondensation. When the synthesis of high molecular weight PMA is performed by ring-opening polymerization, it is difficult because of the several steps involved in this reaction cycle, including a great deal of time for repeated purification. In contrast, direct polycondensation is a very useful method for the synthesis of polyesters since it is achieved by a one step reaction. In this report, we describe a new and simple method to synthesize high molecular weights compounds of α,β-PMA by direct polycondensation. The optimum reaction temperature for the synthesis of α,β-PMA by direct polycondensation was 120–130xa0°C, irrespective of reaction solvents or catalysts. From these results, we conclude that our approach efficiently synthesizes higher molecular weight compounds of α,β-PMA.
Langmuir | 2004
Takehiko Ishii; Hidenori Otsuka; Kazunori Kataoka; Yukio Nagasaki
Biomacromolecules | 2005
Seiji Takae; Yoshitsugu Akiyama; Hidenori Otsuka; Teisaku Nakamura; Yukio Nagasaki; Kazunori Kataoka
Analytical Chemistry | 2005
Katsumi Uchida; Hidenori Otsuka; Mitsuhiro Kaneko; Kazunori Kataoka; Yukio Nagasaki
Biomaterials | 2005
Tetsushi Taguchi; Liming Xu; Hisatoshi Kobayashi; Akiyoshi Taniguchi; Kazunori Kataoka; Junzo Tanaka
Langmuir | 2004
Yukio Nagasaki; Takehiko Ishii; Yuka Sunaga; Yousuke Watanabe; Hidenori Otsuka; Kazunori Kataoka
Langmuir | 2004
Hidenori Otsuka; Yukio Nagasaki; Kazunori Kataoka
Materials Science and Engineering: C | 2004
Tetsushi Taguchi; Yu Sawabe; Hisatoshi Kobayashi; Yusuke Moriyoshi; Kazunori Kataoka; Junzo Tanaka
Materials Science and Engineering: C | 2004
Tetsuto Kajiyama; Hisatoshi Kobayashi; Tetsushi Taguchi; Hirofumi Saito; Yu Kamatsu; Kazunori Kataoka; Junzo Tanaka
Polymer Bulletin | 2003
Tetsuto Kajiyama; Tetsushi Taguchi; Hisatoshi Kobayashi; Kazunori Kataoka; Junzo Tanaka