巻号一覧
38 巻, 4 号
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1982 年 38 巻 4 号 p. T191b
発行日: 1982年
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (55K) -
1982 年 38 巻 4 号 p. T191a
発行日: 1982年
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (55K) -
林 正之, 加藤 良一, 酒井 哲也1982 年 38 巻 4 号 p. T147-T152
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーFilms of poly (p-phenylene terephthalamide) (PPTA) were prepared by immersing glass tubes which were dipped in a concentrated sulfuric acid solution of PPTA in water or in methanol. The polar component of surface tension of the film coagulated in water differed from that of the film obtained in methanol. This difference was considered due to the fact that the direction of the intermolecular hydrogen bonding against the film surface was perpendicular when films prepared in water and parallel in methanol.抄録全体を表示PDF形式でダウンロード (1860K) -
配向特性と力学的性質清水 二郎, 奥居 徳昌, 山本 孝, 石井 昌樹, 高久 明1982 年 38 巻 4 号 p. T153-T162
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーMelt-spinning experiments were carried out to investigate the effect of blend ratio and take-up velocity on the mechanical properties of the polymer blends. Ultra-fine fibrils having several hundred Å in diameter and ca. 105 in aspect ratio are oriented along the extrusion axis and dispersed uniformly in the cross section of the blend filaments.
The following results were obtained.
1) Birefringence and Young's modulus of each component polymer in the resultant blend filaments were estimated on the basis of the linear relationship between birefringence and Young's modulus for each homopolymer of the filaments obtained by the melt-spinning of PP and PS.
2) Orientation of PP component decreases with an increase in PS content. Orientation of PS component is independent of the composition where PS component is formed as a continuous phase and shows the same orientation as that of pure PS filament obtained at the same take-up speed. In the range of the composition where PS is formed as a dispersion phase, orientation of PS increases drastically with a decrease in PS content.
3) For the tenacity of the blend filaments, the transition of ductile to brittle is clearly observed at the critical PS composition V*PS The relationship between the tenacity and the blend ratio can be expressed by means of two straight lines, which lines cross with each other at the V*PS where a fracture mechanism of the blend filament is changed.
4) In order to discuss the relationship between the tenacity and the blend ratio, the effect of the blend ratio on orientation properties of each component of PP and PS must be taken into account. Such a treatment is actually valid in explaining the fracture mechanism of the blend filaments on the basis of the simple composite model, namely parallel model.抄録全体を表示PDF形式でダウンロード (1253K) -
鈴木 淳1982 年 38 巻 4 号 p. T163-T170
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーThere is a close relation between damp or oppressive sense and water content of fabrics. The differences in the critical water content of damp sense of fabrics among fibers have been suggested as one of major factor when we discuss comfortable use of fabrics. The relation between the subjective rating of critical water content of damp sense and the experimental results of fabrics was mainly discussed in this paper.
That is to say, results of sensary test of four kinds of knit fabrics, polyester, acrylics, wool and cotton, on damp and oppressive sense were compared with those measured by both the sliding resistance of water sorbed fabrics to a metal, from which the clingy forces were assessed, and the changes of the temperature and the heat flow in drying. The relationship were mainly investigated between the critical water content of damp sense, the effects of water content to the clingy forces and the temperature or the heat flow. It was found that the critical water content of damp sense was characterized by the critical water content where the clingy force showed the remarkable increase, and the so called the second critical water content in the falling-rate period of drying.抄録全体を表示PDF形式でダウンロード (553K) -
新宅 救徳, 吉村 元一, 岩木 信男1982 年 38 巻 4 号 p. T171-T177
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーカバードヤーン製造において,カバリング糸が芯糸に巻き付くときのバルーンの形状や張力に影響を及ぼす主な因子は遠心力と空気抗力である。一般に糸に作用する空気抗力は空気との相対速度の糸に直角な方向にとられるが,綿糸などでは毛羽や糸表面の状態などの影響による接線方向に作用する抗力を無視できない。したがって,綿糸に作用する空気抗力を次のように考える。(1)糸の直角方向の抗力は投影機により毛羽を無視して測定した直径の1.8～2.2倍の直径の円柱として考える。(2)接線方向の抗力は,直角方向と同じ直径を用いて直角方向の抗力係数の約4分の1程度の接線方向抗力係数とする。
以上の考えによれば,バルーン曲線の形状の理論値と実験結果は比較的一致する。これにより巻き付け張力が明らかになった。抄録全体を表示PDF形式でダウンロード (388K) -
池田 功夫, 鈴木 公宏1982 年 38 巻 4 号 p. P176-P182
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (447K) -
勢田 二郎, 伊藤 泰輔1982 年 38 巻 4 号 p. T178-T182
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーDiffusion coefficient D of Chrysophenine G (C. I. Direct Yellow 12) (DY 12) in cellophane (CELL.) was obtained by the multiple membrane method and under high hydrostatic pressures up to 2.5kbar. The pressure dependence of D was analysed and discussed in terms of the activation volume ΔV_??_ for diffusion obtained by where R, T and P are the gas constant, the absolute temperature and the pressure, respectively. The pressure effect was not large at 100°C, where ΔV_??_ was found to be 18cm3/mol. This amount was only 4% of the effective volume of DY 12, 430cm3/mol. Based on the free volume theory, it was concluded that CELL, was swollen with water and the mean free volume in the initial state was almost sufficient to accommodate the diffusing penetrant, i.e., a large local volume expansion by fluctuation was not needed for activation.抄録全体を表示PDF形式でダウンロード (403K) -
中村 立子, 飛田 満彦1982 年 38 巻 4 号 p. T183-T190
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリー塩基性染料やカチオン染料の耐光堅牢度は,それらをとりまく基質に依存している。この原因を知るため,我々は,そのモデルとしてCrystal Violet (CV)のアルコールおよびアセトニトリル溶液中における光反応について研究した。脱気条件下では, CVの光反応は使用したすべての溶媒中で還元であり,ロイコ化合物が生成する。光反応は照射光の波長に著しく依存し,可視光より紫外光により励起したCVの方が非常に活性である。空気飽和の溶媒中では, CVの光反応はアセトニトリル中では酸化であるが,アルコール中では還元であった。抄録全体を表示PDF形式でダウンロード (448K) -
西 敏夫1982 年 38 巻 4 号 p. P183-P189
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (405K) -
大藪 権昭1982 年 38 巻 4 号 p. P190-P195
発行日: 1982/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (466K)
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