巻号一覧
18 巻, 12 号
選択された号の論文の5件中1～5を表示しています
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各種バインダーへのポリマーの溶解性について今村 敏英, 鈴木 正1975 年 18 巻 12 号 p. 1063-1067
発行日: 1975/12/01
公開日: 2009/01/30
ジャーナル フリーThe relationship between the state of solution of polymer added in the asphalt and the state of maltens, asphaltenes, and micelles in its binder was studied and the following results were obtained:
1. The polymer added was solved in the malten of the asphalt.
2. The smaller the value of MwXΔS.P., the greater the solubility of polymer in the asphalt, where the figure of Mw is an average molecular weight obtained by the Freezing Point depression method of malten in the asphalt and ΔS.P. is the difference between the solubility parameter for the polymer and that for the malten in the asphalt.
From the value of ΔS.P.XMw, it was manifested that (1) below 300 the solubility is good (2) from 300 to 800 the solubility is poor and the uniformity is difficult to obtain (3) above 800 face conversion of micelles in asphalt takes place.抄録全体を表示PDF形式でダウンロード (1236K) -
中島 豊比古1975 年 18 巻 12 号 p. 1068-1073
発行日: 1975/12/01
公開日: 2009/01/30
ジャーナル フリーIn order to study the internal structure of asphalt and the structural deformation with the temperature and the shear, the viscous behaviour of asphalt was investigated over a wide range of the rate of shear. The following results were obtained.
(1) Asphaltene micelles formed by sorption of resinous matters are peptized in maltenes. Under the low temperature and the situation free from shear, asphaltene micelles which have adsorbed and absorbed a large quantity of resinous matters aggregate mutually and form a network-like structure, independent of the grade of asphalt as to blowing.
(2) As the temperature or the rate of shear increases, the desorption of resinous matters takes place and the viscosity decreases. Increasing of maltens and decreasing of the volume occupied by micelles at a higher temperature and/or the rate of shear leads to destruction of the cohesion of asphaltene micelles.
(3) From the fact that the Ostwald-type flow curves are obtaind when measuring viscosity over a wide range of the shearing rate, it is presumed that the asphalt has also the colloidal characteristic properties similar to those of familiar polymer solutions.抄録全体を表示PDF形式でダウンロード (2432K) -
X線回折データの検索大島 昌三, 中井 元康, 安井 喜昭, 上武 成吾1975 年 18 巻 12 号 p. 1074-1080
発行日: 1975/12/01
公開日: 2009/01/30
ジャーナル フリーA simple computer search system for X-ray diffraction data has been developed using a PDP-8/I small computer. The observed data which are stored in the core memory with on-line or off-line system are referred to the standard diffraction angles and the peak intensities using three parameters which consist of MATCH, LIMIT INTENSITY, and WIDTH. About 6, 000 compounds are selected from the Powder Diffraction File as the standard data and classified into 54 volumes of paper tape according to element. The system shows good performances for complex standard mixtures and actual samples such as engine deposits. Average searching time is about 5 minutes.抄録全体を表示PDF形式でダウンロード (535K) -
南部 昌生, 山本 駿一, 小祝 義久, 町田 英雄, 福田 修久1975 年 18 巻 12 号 p. 1081-1085
発行日: 1975/12/01
公開日: 2009/01/30
ジャーナル フリーAn aqueous solution containing both pentavalent vanadium and divalent manganese compounds has been found to be useful for autoxidation of sulfur dioxide.
Thus, a flue gas desulfurization process using the new catalyst, comprising absorption, oxidation and neutralization (producing gypsum), has been developed by means of a laboratory equipment (Fig. 1) with simulated gas.
Introducing sulfur dioxide into an aqueous solution of pentavalent vanadium compounds, vanadium was rapidly reduced to tetravalent state and deactivated; therefore the solution could not be provided as catalyst.
Reduction of vanadium was extremely suppressed by a little amount of divalent manganese compounds; moreover, the catalyst activity was remarkably increased.
Pentavalent vanadium needed for preparing the catalyst and making up for the circulation loss could be readily obtained by oxidizing washings of fly ash from residual oil-fired boilers.
In comparison with the well-known conventional catalyst "aq-Solution of Ferric Sulfate", the new catalyst has higher activity and therefore causes more autoxidation of sulfur dioxide in absorber, and results in superior sulfur dioxide removal.
Neutralizing the sulfuric acid in the catalyst solution by means of limestone, gypsum was produced and tetravalent vanadium was oxidized with air. After separating the catalyst solution from gypsum, it was recycled to absorb sulfur dioxide.
All kind of anticipated catalyst contaminants proved to be nonpoisonous.抄録全体を表示PDF形式でダウンロード (1321K) -
古田 毅, 白石 稔, 真田 雄三1975 年 18 巻 12 号 p. 1086-1090
発行日: 1975/12/01
公開日: 2009/01/30
ジャーナル フリーThe relationship between the chemical structure and the graphitizability of the solvent fractions obtained from pitches has been studied by elementary analysis and by measuring the molecular weight, NMR and the X-ray diffraction.
Coal tar pitch and petroleum pitches were extracted with benzene and ethyl ether and were separated into two fractions (benzene soluble-ethyl ether soluble and benzene soluble-ethyl ether insoluble). The molecular structure of these fractions was thought to be of polynuclear condensed aromatic rings. That is, molecules in the fraction mentioned above consisted of 1 to 7 of structural units, which were composed of 4 to 10 aromatic rings having 1 to 3 methyl or ethyl groups. The number of structural units per molecule, nu, is one of the important factors affecting the mesophase formation and the subsequent graphitization process. The value of nu relates closely to flatness and mobility of the molecule and correlates also to stacking process of aromatic plane sheets during the mesophase formation in a liquid phase of the carbonization process. The texture (microstructure) of mesophase depended upon the molecular structure, especially upon the nu value. The graphitizability decreased with the increase of nu value within the limit of our experiments.抄録全体を表示PDF形式でダウンロード (462K)
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