巻号一覧
35 巻, 8 号
選択された号の論文の9件中1～9を表示しています
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中村 良治1979 年 35 巻 8 号 p. P205-P212
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (683K) -
尾鍋 史彦1979 年 35 巻 8 号 p. P213-P224
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (827K) -
中島 勝, 熨斗 秀夫, 山崎 隆, 堀田 康夫1979 年 35 巻 8 号 p. T321-T327
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーThe contraction and recovery behavior of collagen films cross-linked with formaldehyde was observed in aqueous LiBr solution and water. The main results are as follows.
1. Contraction ratio (L/Lo: length after contraction/original length) along the drawing direction of collagen when it is immersed in an aqueous 20 mol/L LiBr was greater than that along the perpendicular direction. The contraction ratio in the drawing direction was 0.73.
2. The time needed for the completion of contraction was usually longer than the time of recovery. When the collagen film was immersed in an aqueous LiBr solution, the contraction speed was initially large and then slowed down with time lapse. A similar attenuation was observed in the case of recovery.
3. When the collagen treated with a 5% formaldehyde solution was immersed in aqueous 15 mol/L LiBr solution, times needed for the contraction and the recovery was shortest, and the contraction and recovery ratios were largest.
4. The maximum number of cycles of contraction and recovery was more than 500 cycles.
5. Breaking stress of collagen immersed in water, aqueous 10 mol/L and 20 mol/L LiBr solutions was approximately one fourth of that of dry collagen. Breaking strain of the collagen immersed in water was smaller than any other cases.
6. When the load applied to the lower end of the collagen film increased, the contraction length decreased. The relation between load and contraction length was linear. Work done by contraction, load x contracted length, increased with increasing load.抄録全体を表示PDF形式でダウンロード (488K) -
清造 剛, 大東 忠之1979 年 35 巻 8 号 p. T328-T332
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーCommercial polyethylene terephthalate fiber was heated in N2 atmosphere or in vacuum to several temperatures below the melting point. ηsp/C of the polymer solution increased a little with heating in N2 and strikingly with heating in vacuum. The activation energy for the post-polymerization in vacuum is found to be 20.8 kcal/mol. Tensile strength, elongation and Young's modulus decreased with heating except with heating in vacuum at 253°C; the latter increased elongation remarkably. The crystallinity measured by density method increased with heating noticeably in comparison with that measured by X-ray method. With heating in vacuum at 253°C, the crystalline orientation changed little while the amorphous orientation decreased largely. Superheating of the melting point measured by DTA method occurred remarkably with heating in vacuum at 253°C. The increase of tensile elongation and the peculiar change of fine structure for the fiber heated in vacuum at 253°C can be explained by the formation of tie molecules during the post-polymerization in the solid-state.抄録全体を表示PDF形式でダウンロード (349K) -
田川 美恵子1979 年 35 巻 8 号 p. T333-T338
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーAdsorption onto cotton and polyester fibers of two kinds of polyvinyl alcohols (PVA) having different amount of residual acetyl group is investigated. PVA-iodine complex method is applied for the determination of PVA concentration. The shapes of adsorption isotherms for these two PVA's at 40°C are clearly different. The amount of adsorbed PVA-I, having no residual acetyl group, is saturated once at lower concentration level and then increases linearly with the concentration in solution. While, that of PVA-II, having 20mol% of residual acetyl group, is saturated at certain low concentration without further increase. The adsorption behavior depends on the amount of residual acetyl group of PVA but not on the kind of fibers.
Equilibrium adsorption constant k and the amount of saturated adsorption x∞ calculated from these adsorption data, as well as specific surface area obtained from N2-adsorption data in B. E. T. method, were discussed to elucidate the polymer adsorption mechanism.抄録全体を表示PDF形式でダウンロード (386K) -
田川 美恵子, 前川 昌子1979 年 35 巻 8 号 p. T339-T344
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーIn the previous reports, one of the authors has reported that poly(vinyl alcohol) (PVA) shows an excellent anti-soil-deposition action for various fabrics as studied in a model soiling bath containing fabric, surfactant and carbon black particles. In this report the mechanism of anti-soil-deposition of PVA is investigated. The amounts of adsorbed PVA onto carbon black particle and fabrics (cotton or polyester), and the anti-soil-deposition efficiency for the fabrics, were measured in the above soiling bath devoid of surfactant. It is concluded that the action is not ascribed to PVA adsorbed on the fabrics but to that adsorbed on carbon black particle, of which more than 10 percent of the surface area is covered with PVA.抄録全体を表示PDF形式でダウンロード (413K) -
桑原 滋1979 年 35 巻 8 号 p. T345-T351
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーThe effects of normal alcohols and iso-octane on the dyeing properties of polyethylene terephthalate (PET) films from tetrachloroethylene (PCE) liquors have been examined in respect to dye diffusion coefficients, saturation values and partition coefficients, etc.
The results are summarized as follows;
(1) By addition of the alcohols, the diffusion coefficient of Disperse Red 4 in PET increased and reached a maximum at around 20-40vol.% of alcohols added. However, the saturation value and partition coefficient of the dye on PET decreased and showed minima at around 20-40vol.% of the alcohols.
The content of the alcohols in PCE, at the maximum or minimum values, decreases with carbon number of the alcohol.
The larger change in the diffusion coefficient, saturation value and partition coefficient is observed with the smaller carbon number of the alcohol.
On the contrary, iso-octane added in PCE for comparison has practically no effect on the dyeing.
(2) The change in the dyeing properties of PET produced by the addition of alcohols can be correlated with the swelling and the plasticization of PET, in addition to the increased solubiities of dye in the dye bathes.抄録全体を表示PDF形式でダウンロード (467K) -
清水 滉, 坂口 育三1979 年 35 巻 8 号 p. T352-T356
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーAdsorption behaviors of Ni (II), CO (II) and Mn (II) on silk fibroin fiber and also on the same fibers but chemically modified with acetic anhydride-pyfidine mixture or dehydrated methanol were investigated, and the results were compared. The following findings are reported: (i) No adsorption of Ni (II), Co (II) and Mn (II) on the unmodified silk fiber was recognized below pH 4.5. The adsorbed amounts of these metal cations increased markedly in a pH range higher than 5.0; (ii) The adsorption isotherms of each metal cation were described in terms of the Langmuir-type adsorption formula at the equilibrium state at pH=5.0, and the adsorption of these metal cations was of endothermic reaction associated with entropy increase, (iii) The adsorption sites for these metal cations were assigned to the carboxyl end group of silk fiber at pH=5.0; while at pH=5.4, to the carboxyl and amino end groups.抄録全体を表示PDF形式でダウンロード (290K) -
〓間 正雄, 富森 美緒1979 年 35 巻 8 号 p. T357-T360
発行日: 1979/08/10
公開日: 2008/11/28
ジャーナル フリーThe relationships between the physical properties of textile composite fabric and those of the constituting face fabrics and fusible interlinings were investigated experimentally and statistically. The properties investigated were as follows: bending resistance, drapability, permeability and shrinkage.
It was found that certain properties of a textile composite fabric could be explained in terms of the corresponding properties of the constituent textile fabric. For instance, the bending resistance of textile composite fabric could be correlated with the total bending resistance of the constituting textile component fabric significantly. The influence of face fabrics and fusible interlinings on the other properties of a textile composite fabric were also studied.抄録全体を表示PDF形式でダウンロード (259K)
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