巻号一覧
77 巻, 12 号
選択された号の論文の4件中1～4を表示しています
- |<
- <
- 1
- >
- >|
-
笈木 宏和, 狩長 亮二, 吉田 浩之, 大室 荘彦, 早川 亮二, 藤 道治, 森 哲夫, 竹下 剛2004 年 77 巻 12 号 p. 409-413
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーDecomposition of natural rubber serum was investigated by using two kinds of microorganisms, namely, lactic acid producing bacteria and green algae, and four kinds of methods for immobilizing the microorganisms, which were adsorption on a resin, cross-linking, microcupsulation, and adsorption on glass-beads. The immobilized bacteria in microcapsule resin gave high ability to produce lactic acid and to consume rubber waste. This type of immobilized bacteria also exhibited high ability when it was applied to decompose rubber waste by using middle-scale reactor.抄録全体を表示PDF形式でダウンロード (834K) -
中嶋 直敏2004 年 77 巻 12 号 p. 414-419
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーCarbon nanotubes (CNTs) have been in the forefront of nanoscience and nanotechnology because of their remarkable electronic, mechanical and thermal properties and specific functions. CNTs have high potentials for, possible applications in the fields of energy, electronics, IT and novel nano-materials. However, because of the insolubility of the nanotubes in solvents, chemical, biochemical and biological (medical) approaches using these materials have been rather limited. Soluble carbon nanotubes in aqueous and organic systems are of interests since they may open the door in such fields. In this review article, we describe: i) introduction, ii) structure of CNTs, iii) synthesis and purification of CNTS, iv) dissolution of CNTs by physical adsorption of surfactants, polymer and polycyclic aromatic compounds and DNA, v) separation of semiconducting CNTs and metallic CNTs, and vi) nanocomposites with polymers including the preparation of nanotube films and fibers.抄録全体を表示PDF形式でダウンロード (1465K) -
その7. NRの伸張結晶化による自己補強 (2 : 新補強モデルの提案)深堀 美英2004 年 77 巻 12 号 p. 420-426
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーThe author introduces the assumption that first, vulcanized rubber consists of the inhomogeneous structures, discontinuous cross-linked phase and continuous uncross-linked phase. Secondly, the strain-induced crystallization takes place in the uncross-linked phase of NR whose volume fraction is about 25% in the system. In the uncross-linked phase under large extension, molecular flows and orientation occur due to the high compression given by surrounded cross-linked hard rubber phases. As extension increases, the crystallization spreads over the uncross-linked phases, thus the uncross-linked phase is regenerated from its original soft uncross-linked rubber to the hard and strong super-network made of small crystals and extended molecules. The strand network supports the major part of heavy stress of the system and generates the upturn of the stress. The strength of the strand (true stress) becomes about 1.6 GPa in failure, absolutely the same value as that of polypropylene fiber.抄録全体を表示PDF形式でダウンロード (1621K) -
3. 希土類金属錯体によるジエン系エラストマーの合成会田 昭二郎, 若槻 康雄2004 年 77 巻 12 号 p. 427-431
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーRecently, Nd-based catalyst systems have been developed for the polymerization of butadiene, and have already been widely used in industrial applications. However, the 1, 4-cis selectivity and molecular weight distribution of the produced polybutadiene (BR) cannot be well controlled, since these catalyst systems are Ziegler-Natta based “multisite” catalysts. On the other hand “single-site” catalyst system, lanthanide-metallocene/cocatalyst system, has attracted recent interest as the next generation catalyst system, which can induce ultimately specific 1, 4-cis polymerization (>99.99%) and cis-specific living polymerization (sharp MWD). This article is a brief introduction of recent topics, including strategies aiming at these new elastomers based on tailor-made lanthanide-metallocene catalysts.抄録全体を表示PDF形式でダウンロード (867K)
- |<
- <
- 1
- >
- >|