巻号一覧
31 巻, 4 号
選択された号の論文の10件中1～10を表示しています
- |<
- <
- 1
- >
- >|
-
竹本 喜一1975 年 31 巻 4 号 p. P105-P109
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (315K) -
林 寿郎1975 年 31 巻 4 号 p. P110-P119
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (813K) -
大村 寧1975 年 31 巻 4 号 p. T111-T117
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーThe physical properties corresponding to the sensory values “hardness” and “body” of urethane foams were discussed in the previous reports1), 2) and it was reported mainly that the gradient of compressive stress in the first linear part on S-S curves (young's modulus) is representative of the sensory value “hardness”. Therefor, young's modulus seems to be an important physical property on “handling” in this material.
In this report, a model cell structure of flexible polyurethane foam was constructed through microscopical observations, and the theoretical calculation of compressive young's modulus is discussed.
The results obtained as follows:
(1) In general, the size (l2) of the cell in parallel to rising direction is larger than that (lx) in perpendicular to rising direction.
(2) In the model proposed in this report, a foam is composed of many uniform cells, shaped rectangular parallelopiped. Twelve edges of this rectangular parallelopiped are equal to cell skeletons of the foam. The following equations, showing the compressive young's modulus (Yz) in parallel to rising direction and (Yx) in perpendicular to rising direction, were derived theoretically.
Where ρ is the apparent specific gravity of foam, ρo the specific gravity of cell skeleton and Yo the compressive young's modulus of the cell skeleton (solid elastomer).
The results of the calculations on the above equations showed a good agreement with the observed values
of compressive young's modulus.
(3) The anisotropy of compressive young's modulus of foam between in parallel and in perpendicular to rising direction may be explained by the above equations, as Yz and Yx include lz and lx as the factors. The anisotropy depends upon lz and lx in the form of the equation Yz/Yx=lz/lx.抄録全体を表示PDF形式でダウンロード (1259K) -
田中 信行, 中島 章夫1975 年 31 巻 4 号 p. T118-T121
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーBy applying the theoretical equation proposed by the authors for melting of two-component copolymer, the numerical values of heat, hx, and entropy, sx, of transition of quasi-crystal per structural unit were estimated for polyethylene-terephthalate/adipate, polyethylene-terephthalate/sebacate, and polyethylene-sebacate/terephthalate copolymers. Comparisons of hx and sx with the heat, hu, and entropy, su, of fusion of crystallizable component polymer led to that -CH2-O- linkages in crystalline sequence of these copolymer backbone chains were twisted from the planer zig-zag conformation more than those in quasi-crystal.抄録全体を表示PDF形式でダウンロード (260K) -
崎出 宗吉1975 年 31 巻 4 号 p. P120-P123
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (331K) -
後藤 共子, 長野 正満, 田中 敬造1975 年 31 巻 4 号 p. T121-T127
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーThe melt spinning of commercially pure iron was investigated by means of the melt spinning conjugated with glass and the following results were obtained.
1) The strength of iron filament increases with decreased cross-sectional area of the filament and with increased winding speed for the filament with the diameter less than 20μ. The elongation of iron filament decreases with increased winding speed. For example, the iron filament with the diameter 17.9μ, the tensile strength 53.4kg/mm2 and the elongation 1.23% is obtained at winding speed 146m/min.
2) The double layer structure is observed by the scanning electron microscope and the cellular dendrite substructure is observed in the filament with the diameter more than 35μ.
3) The fiber axis of iron filament prepared by the melt spinning, is <111> plane which is not the same as cold drawing of α-Fe, but for the filament with the diameter more than 35μ the preferred orientation is not observed.抄録全体を表示PDF形式でダウンロード (2372K) -
村山 宏1975 年 31 巻 4 号 p. P124-P130
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (527K) -
成田 宏, 柴原 清, 町田 誠之1975 年 31 巻 4 号 p. T128-T130
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーNylon-6 films of various degrees of crystallinity were prepared from the formic acid solution. The film was reacted with 2, 4-dinitrofluorobenzene in the heterogenious state, and the end amino groups were determined spectrophotometorically. The crystallinity was determined by specific gravity. From the results obtained, 5_??_25% of end-amino groups were found to exist in the crystalline region of the polymer.抄録全体を表示PDF形式でダウンロード (203K) -
小笠原 真次, 関 隆夫, 黒岩 茂隆1975 年 31 巻 4 号 p. T131-T134
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーThe effect of intramolecular hydrogen bonding on complex formation between monoazo acid dye and tannic acid (Chinese gallotannin) is investigated spectrophotometrically.
Two dyes having no intramolecular hydrogen bonding, Orange I (C. I. Acid Orange 20) and Metanil Yellow (C. I. Acid Yellow 36), and one dye having an intramolecular hydrogen bonding, Orange G (C. I. Acid Orange 10), were used. By means of modified McConnell-Davidson's method, molar ratio and equilibrium constants for complex formation were determined, and the changes of thermodynamic characteristic functions such as ΔG0, ΔH0 and ΔS0 were calculated by the usual manner. The molar ratio of complex was 1:1 for all three dyes and the values of ΔH0 and ΔS0 were -9.20Kcal/mol and -12.5cal/mol•deg for Orange I, -9.45Kcal/mol and -17.7cal/mol•deg for Metanil Yellow, and -6.10Kcal/mol and -5.19cal/mol•deg for Orange G, respectively.
It may be concluded from the results obtained in the present and previous papers, that the monoazo acid dye forms 1:1 complex with gallic acid residue of tannic acid by the intermolecular hydrogen bonding regardless of existence of the intramolecular hydrogen bonding of azo group in the dye molecule.抄録全体を表示PDF形式でダウンロード (261K) -
矢留 智津子, 山口 幸男, 高瀬 福巳1975 年 31 巻 4 号 p. T135-T141
発行日: 1975/04/10
公開日: 2008/11/28
ジャーナル フリーViscosity measurements were made on aqueous solutions of LiCl, Me4NCl, Et4NCl, Me3NBeCl, Et3NBeCl and Me2NBe2Cl in the concentration range 0-3M. The viscosity B coefficients, which were calculated by Vand equation developed for concentrated suspensions, were shown to correlate with the B coefficient of the Jones-Dole equation for dilute solution of the salts. The values of Ve were calculated according to the model of Breslau-Miller. The behavior pattern obtained of Ve as a function of concentration gave indications of the hydration behavior of concentrated solution of the salts. It was suggested that the additivity rule for the B coefficient and for the value of Ve can be applied to the solution of salt mixtures.
Chemical shift of water proton was measured on aqueous solutions of LiCl, Me4NCl, Et4NCl, Me3NBeCl and Et3NBeCl in the concentration range 0-2M. The upfield shift of the water proton decreased in the order, Me4NCI<Et4NCl<Me3NBeCl. This order was consistent with an increase in water structure promotion. The chemical shift of water proton (Δν) was fitted to the equation Δν=am+bm2. It was suggested that additivity rule for the chemical shift of the water proton can not be applied to solutions of salt mixtures, except Me4NCl-Et4NCl mixtures.抄録全体を表示PDF形式でダウンロード (462K)
- |<
- <
- 1
- >
- >|