著者

臼杵 直也 中薗 和子 高田 十志和

出版者

基礎有機化学会(基礎有機化学連合討論会)

雑誌

基礎有機化学討論会要旨集(基礎有機化学連合討論会予稿集)

巻号頁・発行日

vol.2011, pp.417-417, 2011

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環状高分子は線状高分子とは異なる物理特性を示す。しかし、環状高分子の効率的な合成法が少なく、また通常高希釈条件下で反応を行うために高収率で得ることが難しいという問題点がある。そこで本研究ではこのような問題点を克服する新規環状高分子合成法として、上に示すロタキサン構造を利用した線状と環状の平衡を満たす[1]ロタキサンポリマーの合成について検討したので報告する。この系が達成できれば環状高分子の合成にとどまらず、線状と環状のトポロジー変換を行えるため、投げ縄の内孔や物性の変化を利用した新しいアクチュエーターへの応用等が期待できる。

著者

高田 十志和 大塚 英幸

出版者

The Society of Synthetic Organic Chemistry, Japan

雑誌

有機合成化学協会誌 (ISSN:00379980)

巻号頁・発行日

vol.64, no.3, pp.194-207, 2006-03-01 (Released:2010-10-20)

参考文献数

61

被引用文献数

11 10

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Dynamic covalent chemistry relates to the utilization of chemical equilibrium systems, i.e., reversible cleavage-rebondage of covalent bond, which is effectively applicable to the molecular architectures in supramolecular chemistry and polymer chemistry. This review deals mainly with molecular integration and molecular conversion of supramolecules and polymers in order to prove significance and utility of the dynamic covalent bond by introducing the representative research studies. Equilibria of imine bond, carbon-carbon double bond, disulfide bond, trityl carbon-sulfur bond, ester bond, alkoxyamine bond, and so on are typical dynamic covalent bonds, and several important examples for the constructions of interlocked molecules and polymers are described. In the utilization of the dynamic covalent bond in polymer, utility of a few reversibly cleavable covalent bonds included in polymer main chains is also discussed for the formation and transformation of polymers and cyclic polymers.

著者

松井 紳一郎 青木 豊次 高田 十志和

出版者

日本武道学会

雑誌

武道学研究 (ISSN:02879700)

巻号頁・発行日

vol.23, no.3, pp.55-62, 1991-03-30 (Released:2012-11-27)

参考文献数

8

被引用文献数

2

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Differences of physical construction between fighting Judo players often exert serious effects on the result of the match. However, some competitions in Japan are carried out regardless of considerating the constitutional differences, especially weight difference. It is important to examine the effects of constitutional differences on the match, since need of the open-weight class is discussed in the international Judo competitions.In this study, the effects of the constitutional differences (height and weight) on the Judo matches were investigated by analysing the success of the all Japan Judo championship competitions from Showa 55th (1980) to Heisei 1st (1989)The maior findings obtained were as follows:1. There was no significant difference in the number of victories between taller and shorter players in.32,2, matches in which difference of height was appreciated. Slight advantage was found in taller players, when the difference of body height was 6 cm or greater.2. When the difference of body weight was less than 20kg, there wes no effect on the success of the matches. In the matches with weight difference of 20-40kg, heavier players tended to be superior to lighter players, but the ratio of the success of match was 153: 128, indicating no significant difference. It is clear that when the weight difference was more than 40kg, heavier players was advantageous.3. Both the weight and the height differences show no effect on the success of the matches at the first half of the tournament (the 1st and 2nd tournaments), but at the second half of the tournament (from 3rd tournament to the final) heavior players were easier to win than lighter players.4. The main difference was observed in the number of “Ippon”, in the win of the matches between players with superior and inferior constitutions.In summary, it is suggested that most of participants (ca.74% of all) can have an equal opportunity of success in the all Japan championship competition. This may justify the existence of the Judo competition without distinction of weight.

著者

宮崎 光治 高田 十志和 遠藤 剛 稲永 昭彦

出版者

一般社団法人日本歯科理工学会

雑誌

Dental Materials Journal (ISSN:02874547)

巻号頁・発行日

vol.13, no.1, pp.9-18, 123, 1994-06-25

被引用文献数

1 13

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スピロオルトエステルを側鎖に持つアクリレート(ASOE)およびメタクリレート(MASOR)を合成し,その重合と得られた重合体の性質について検討した.スピロオルトエステルはイオン重合開始剤(BSS, HPSS)による加熱重合によって良く開環重合した.しかし,得られた重合体には少量の未反応の二重結合が見られた.また,ラジカル重合開始剤(BPO, AIBN, DTBおよびCQ)による重合ではビニール基の重合のみならず開環重合も低調であった.BSS ,AIBNおよびBPO/BSSによる加熱重合によって得られたMASOE重合体はプラスチックス状であった.ASOEおよびMASOEのイオン重合開始剤による加熱重合や紫外線重合における重合収縮は汎用のモノメタクリレートに比べて有意に小さかった.