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- 저자 : Satoshi Kuno (검색결과 2 건)
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Catalytic Behavior of Silyl-Amide Complexes for Lactide Polymerization
이찬우,Satoshi Kuno,Yoshiharu Kimura 한국고분자학회 2013 Macromolecular Research Vol.21 No.4
A series of silyl-amide complexes (=M{N(SiMe3)2}2) were examined as the catalysts for the ring-opening polymerization (ROP) of L-lactide. The catalytic activity of the silyl-amide complexes for zinc was compared with that of the silyl-amide complexes of tin in order to clarify the structural effects on the catalytic behavior. In the tin complexes, the addition of 1-dodecanol made the polymerization rate of L-lactide faster and suppressed the initiation with the N(SiMe3)2 ligands. The 1H NMR analysis revealed that the rates of ligand exchange for the N(SiMe3)2 and 1-dodecanol are different between the zinc and tin complexes. Based on this finding, melt polymerizations of L-lactide was conducted with the zinc catalyst to synthesize high-molecular-weight poly(L-lactide). The Mn of the obtained polymer was found to become higher than 60,000 Da, which is required for the industrial application of polylactide,in a short reaction time.
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Mechatronics Education Using Robot Competition in Okayama University of Science
Akagi, Tetsuya,Fujimoto, Shinsaku,Kuno, Hiroaki,Araki, Keisuke,Yamada, Satoshi,Dohta, Shujiro Korean Society for Engineering Education 2010 공학교육연구 Vol.13 No.2
Electronics machines make daily human life more convenient and comfortable and try to ease burdens. When designing and manufacturing such mechatronic systems, the engineers need to have a wide range of knowledge. The purpose of our education is for students to learn to use mechatronic techniques. To realize our goal, we regard "an interest in creation" of our student as an important educational method. In this paper, we propose and try an educational method for mechatronics creation using "their interest". The method is to hold robot competitions between 1st and 3rd year students as a regular curriculum. In order to confirm the progress of our students in our engineering course, in the last year, some students entered the Rescue Robot Contest held in Kobe Japan. As a result, our student team got second place, a great honor considering it was our first attempt. We confirm that the robot competition is a useful method to make students study by themselves.
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