巻号一覧
77 巻, 11 号
選択された号の論文の8件中1～8を表示しています
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海上 瑠奈, 伊藤 眞義, 小野 茂之2004 年 77 巻 11 号 p. 375-381
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーAn examination was carried out on the quantitative analysis of bound rubber in silica-filled rubber systems by a thermal gravimetric analyzer (TGA), transmission electron microscopy (TEM) and pulsed NMR. The bound rubbers in solution mixed composites were primarily composed of filler gel which corresponded to the entrapped rubber phase in the agglomerate of silica particles. The amounts were well correlated with the averaged size of agglomerate of silica particles (Sagg) in the composites. The Sagg for mechanically mixed composites was 10-1 to 10-2 of Sagg for solution mixed composites. Thus, most of the bound rubbers in the mechanically mixed composites were composed of rubber gel which corresponded to the chemically cross-linked rubber phase in the composites. The difference of segmental mobility between filler gel and rubber gel was detected by pulsed NMR. The mobility was higher for rubber gel than for filler gel.抄録全体を表示PDF形式でダウンロード (1381K) -
阿波根 朝浩, 岩田 充宏2004 年 77 巻 11 号 p. 382-387
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーDependence of tack on contact force, contact time and surface roughness was studied using a Br-IIR compound. The results suggested that the tack of the uncured rubber compound was determined by bond forming and bond destruction processes.
The observed tack values were examined by means of the Hertz's elastic contact theory. Tack was found proportional to [W/G(t)]2/3, W and G(t) being the contact force and the time dependent shear modulus of the material to account for the contact time dependence, in accordance with the theory. This indicated that the true contact area during bond formation was the major factor determining the tack, and that the contact time dependence was caused by the creep taking place at the pairs of contacting surface protrusions. Given the effectiveness of the theory to evaluate the true contact area, the effect of surface roughness was examined. An extra contribution to tack, in addition to that determining the contact area, from the number of the surface protrusions appeared to exist. It was considered attributable to viscous dissipation upon mechanically detaching the bond.抄録全体を表示PDF形式でダウンロード (989K) -
下村 雅人2004 年 77 巻 11 号 p. 388-392
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーBio-related reactions are broadly applicable in detection and determination of specific substances as well as in chemical synthesis. Many types of biosensors have been developed by use of biomaterials, such as enzymes, antibodies and binding proteins. In biosensing systems, it is essential to convert chemical and/or physical changes accompanying specific molecular recognition with the biomaterials into definite information. Bioelectrochemical systems consisting of biochemical and electrochemical reactions are promising candidates to inform the biochemical molecular recognition as electrical signals. In this article are surveyed the molecular recognition with biomaterials, their application to biosensors, especially to bioelectrochemical sensors, and the example of amperometric sensing with them.抄録全体を表示PDF形式でダウンロード (939K) -
2. d-ブロック遷移金属触媒による 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 11 号 p. 393-396
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーDiene elastomers, in particular, high cis polybutadiene (BR) and high cis polyisoprene (IR), are widely used as synthetic rubber. Industrially, Ziegler-Natta catalyst systems using Ni, Co, and Nd metals have been employed for the production of BRs which have high 1, 4-cis contents (94-98%), but the molecular weight and molecular weight distribution of the resulting polymers in these systems can not be well controlled (MWD_??_3-4). Since homogeneous catalysts can better control molecular weight, d-block transition metal metallocene/MAO catalyst systems, e.g. CpTiC13/MAO, have been developed recently. In such “single-site” catalyst systems, cis-specific living polymerization (sharp MWD) of 1, 3-butadiene have been realized. This article is a brief introduction of recent topics, including modification of the CpTiCl3/MAO system. Mechanistic studies of the 1, 4-polymerization of butadiene affected by organometallic catalysts are also described.抄録全体を表示PDF形式でダウンロード (779K) -
その6 : NRの伸張結晶化による自己補強 (1) これまでに何が解ったと考えられているか深堀 美英2004 年 77 巻 11 号 p. 397-403
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーNatural rubber has a great tensile property, the very high tensile strength in particular, without the addition of carbon blacks, which has been understood to result from the stain-induced crystallization. However, there has been much discussion and confusion about the sudden stress increase at a large extension, i.e. “the upturn” in NR.That is, one explains the phenomenon from the viewpoint of the reinforcement of rubber by crystals (but without any detailed discussion) and the other depicts with the non-Gaussian stress-strain relation, ignoring the strain-induced crystallization. Here, we focus on the strain-induced crystallization and the cross-linked structures of NR and search the hints to link the strain-induced crystallization to the self-reinforcement in NR.抄録全体を表示PDF形式でダウンロード (1313K) -
西 敏夫2004 年 77 巻 11 号 p. 404-405
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーPDF形式でダウンロード (641K) -
川面 哲司2004 年 77 巻 11 号 p. 406-407
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーPDF形式でダウンロード (900K) -
井上 隆2004 年 77 巻 11 号 p. 408
発行日: 2004年
公開日: 2007/05/28
ジャーナル フリーPDF形式でダウンロード (404K)
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