巻号一覧
30 巻, 9 号
選択された号の論文の12件中1～12を表示しています
- |<
- <
- 1
- >
- >|
-
1974 年 30 巻 9 号 p. T432a
発行日: 1974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 (71K) -
1974 年 30 巻 9 号 p. T432c
発行日: 1974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 (71K) -
1974 年 30 巻 9 号 p. T432b
発行日: 1974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 (71K) -
早川 亀雄1974 年 30 巻 9 号 p. P335-P339
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (353K) -
川端 季雄1974 年 30 巻 9 号 p. P340-P348
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (2758K) -
真崎 光夫1974 年 30 巻 9 号 p. P349-P356
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (620K) -
鈴木 公宏, 浅野 哲男, 池田 功夫, 木戸 猪一郎1974 年 30 巻 9 号 p. T413-T423
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーA commercial polyethylene terephthalate fibre (PET), drawn and heat-treated, was immersed in various solvents, the solvent diluted by water or methanol at 60°C for 4 hrs at the relaxed state, and the changes of the physical properties or the internal structure were measured with regard to the swelling, density, shrinkage, birefringence, and X-ray diffractions at wide or small angles. About fifty solvents tabulated in Table 1 with their chemical formulae and solubility parameters were used for the investigation. Immersion of PET in the solvents causes swelling and shrinking, resulting in the increases of density and crystallinity, while it decreases birefringence and orientation. The relation between the solubility parameter (δ) of the solvents and the physical properties is discussed. For each relation, two maxima or minima were observed at δ=9.7 and at 12.0. The results observed are attributed to the interaction between acidic solvent and the basic groups such as carbonyl of PET or between basic solvent and the acidic group such as methylene.
Effects of water or methanol dilution on the properties of PET above mentioned were investigated. The change of properties with concentration was remarkable especially in the case of aqueous phenol solution.
The effects of temperature (for two hrs) and time (at 150°C) of immersion in benzyl alcohol were also investigated.抄録全体を表示PDF形式でダウンロード (700K) -
松本 喜代一, 細田 義則, 泉 由美子, 今村 力造1974 年 30 巻 9 号 p. T424-T431
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーIn the series of investigation (Parts 10-12), the effect of molecular (crystalline and amorphous) orientation on the mechanical properties of biaxially stretched poly(ethylene terephthalate) (PET) films prepared by a dryprocess are further studies made on the effects of crystallinity and molecular orientation on dynamic properties of biaxially stretched polypropylene and poly (vinyl chloride) films are reposted (Parts 7 and 13). In this paper, studies have been made on the effects of crystallinity and molecular orientation on dynamic viscoelastic properties of biaxially stretched PET films.
The following results were obtained.
(1) Profiles characteristic to the dynamic viscoelastic properties, given as a function of temperature change depending on the orientation mode, degree of orientation and crystallinity.
(2) The anisotropy of dynamic modulus of PET films stretched under various conditions are related to the anisotropy of Young's modulus.
(3) E''max value and the temperature at which the E''max appears depend on the crystallinity and the over-all degree of molecular orientation. The deformation mechanism of PET films during stretching were, therefore, analyzed in detail in terms of E''max and the temperature.
(4) The temperature at which tan δmax was observed, corresponding to the glass transition temperature, was independent of the stretching direction of the film but it increased with increasing stretch ratio. The molecular chains seem to be more extended and restricted in the uniaxially stretched films than in the biaxially stretched films.抄録全体を表示PDF形式でダウンロード (563K) -
藤原 康晴, 小林 才子, 安田 武1974 年 30 巻 9 号 p. T434-T438
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーStudies have been made on the morphology of the fiber surfaces of nylon 6 exposed to sunlight and ultraviolet (UV) light, and the results were compared with the mechanical and the thermal properties.
From the electron microscopy, it was found that during the exposure to UV light a number of small depressions were formed on the fiber surface and grew larger in size and that during the exposure to sunlight rhombic cracks were formed in a way that the longitudinal direction of the crack was perpendicular to the fiber direction. The thermograms of differential thermal analysis of the exposed fibers showed that photo-oxidative reactions occurred during exposure and that the endothermic peak of the samples shifted to lower temperature with exposure time. The changes of the mechanical and thermal properties of the fibers by the exposure could be related to those of the surface morphology of the fiber.抄録全体を表示PDF形式でダウンロード (2054K) -
岩戸 昇, 小林 靖二1974 年 30 巻 9 号 p. T439-T445
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーChanges of orientation and crystalline state during the two-step biaxial stretching with film width unrestrained and during the thermal contraction were studied mainly by means of x-ray method. The Type III orientation (restretched at 157°C) is discussed in comparison with the Type II orientation (restretched at 130°C).
When the restretching proceeds (2nd-step stretching) the lamellae oriented to pp direction rotate gradually toward ps direction in the Type II orientation, while in the Type III, the fibrils lying parallel to ps are newly developed at the expense of the lamellar crystals oriented to pp. The remaining lamellar crystals tend to orient with their (040) plane parallel to the film surfaces. It suggests that the fibrils oriented to pp may rotate around the pp upon premelting of boundaries between them. The restretching at such a high temperature followed by cooling also gives a* axis orientation to ps.
By the thermal contraction of the film with the Type II orientation the lamellae gradually rotate back twodimensionally to pp with increasing of the contraction temperature. However, partial melt proceeds so significantly before full recovery to pp that the orientation distribution gradually reaches to the random state.
In the case of the contraction of the Type III orientation, dimensions of the film and the lamellar orientation return to the random state through the process experienced by lst-step and 2nd-step stretching for the most part. Such an extremely anisotropic contraction may not be given only by entropy contraction of the amorphous chains but also significantly by the fact that the fibrils newly developed by the restretching are thermally less stable than the original crystal lamellae.抄録全体を表示PDF形式でダウンロード (4062K) -
脇田 登美司, 黒木 宣彦1974 年 30 巻 9 号 p. T446-T451
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーIt is well known that the mechanical actions play some important roles in the wet dyeing processes. In order to study the effect of vibration on the dye distribution in a fiber assembly in the wet processing, the penetration and the removal of dye in a paper cylinder was investigated under a piston crank motion, and the results are discussed in terms of the flow and diffusion.
The following results are obtained:
1) Apparent mean velocity v of mechanical vibration by piston crank motion was given by the following relation, independent of uniformity of the return motion, v=2vL where v; frequency L: amplitude Distance of dye penetration, area of dye penetration and amount of dye penetrated in a paper cylinder were given by the function of 2vL. These values increased with the increase of 2vL. When 2vL was small, the distance of dye penetration was proportional to √t, and in this case the diffusion was an important facter. When 2vL increases, i.e. when water penetrates more easily in the fiber assembly, the distance of dye penetration deviated from the proportional relation to √t. Dye penetration in fiber assembly was facilitated by the action of mechanical vibration.
2) Dye removal from a paper cylinder stained with dye was accelerated with the increase of 2vL. The effect of vibration on dye removal was given by the product of v and L. From the experimental results, the vibration was more effective on the transfer of dye and chemicals in fiber assembly, comparing with the effect of flow and diffusion as a mechanical action of wet processing.抄録全体を表示PDF形式でダウンロード (1188K) -
脇田 登美司1974 年 30 巻 9 号 p. T452-T457
発行日: 1974/09/10
公開日: 2008/11/28
ジャーナル フリーIn previous paper, it has been indicated that dye transfer in a fiber assembly under wet processing was facilitated by the mechanical vibration and that water flow in yarn was an important factor in the wet processing.
In this paper, dye removal from yarn in running water was investigated on the basis of diffusion equation for a twisted polypropylene yarn stained with nonsubstantive acid dye (Suminol Cyanine 5R, C. I. Acid Blue 114).
The results obtained were as follows:
1) Log (1-m) vs log t curves for dye removal from yarn were compared with the theoretical diffusion curves obtained at various yarn porosities and stirring velocities. Experimental results deviated from the theoretical curve with the increases of porosity and stirring.
2) The values of Dt/a2 on the diffusion curve for various experimental values of 1-m were plotted against the washing time t. Furthermore, (D/a2)•r2 was given by multiplication of D/a2 and yarn radius r. The values of a/r, 1-a2/r2, as a measure of the diffusion part in a yarn section were calculated using the relation between (D/a2)•r2 and stirring velocity for each twisted yarn.
On the other hand, dye distribution in a paper cylinder and dye removal from yarn surface were investigated photographically.
3) Diffusion coefficient of the dye in water was estimated as 1.7×10-4cm2/min by the experiment of dye removal from yarn, while the value by the dye penetration in Agar-Agar was 5.2×10-4cm2/min. It is noted that these were in the same order, in spite that they were obtained by different types of experiment.抄録全体を表示PDF形式でダウンロード (1022K)
- |<
- <
- 1
- >
- >|