巻号一覧
29 巻, 7 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
- >
- >|
-
須田 紀子, 大平 通泰1973 年 29 巻 7 号 p. P221-P227
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1938K) -
岩井 真明, 中尾 統一1973 年 29 巻 7 号 p. P228-P232
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (305K) -
那須野 昭文, 別所 義雄, 前川 稔1973 年 29 巻 7 号 p. P233-P239
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1184K) -
池田 徹雄, 辻 和一郎, 池田 洋子1973 年 29 巻 7 号 p. T267-T273
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーThermogravimetry (TG) was carried out on polypropylene (PP), acrylic acid grafted PP fabrics and those aftertreated with some metal salts or tris (1-aziridinyl) phosphine oxide (APO) in order to estimate their thermooxidative stability.
Weight decrease of original untreated PP fabric is observed at about 350°C in nitrogen atmosphere while it is started at 220°C in air, which indicates that the degradation in the latter is oxidative. Initial degradation temperature (IDT) of PP fabric is decreased by extraction of included stabilizer with benzene or trichloroethylene.
It is shown from the TG curves of the acrylic acid grafted PP fabrics in air that IDT is lowered and the degradation is increased with increasing percent grafting. This behavior agrees with the results of strength loss of the grafted fabrics after heat exposure. Linear relationship is obtained when IDT values are plotted against percent grafting of the acrylic acid grafted PP fabrics, suggesting some possibility to estimate the thermooxidative stability of the acrylic acid grafted PP fabrics from their percent grafting using this relationship. The relationship mentioned above is not established for the acrylic acid grafted and aftertreated PP fabrics.抄録全体を表示PDF形式でダウンロード (498K) -
藤原 康晴, 安田 武1973 年 29 巻 7 号 p. T274-T279
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーNylon-6 fibers, untreated and heat-treated at 160°C, were exposed in outdoors up to 90 days. As the exposure time increased, the tensile strength and the elongation at break decreased, whereas the density and the X-ray crystallinity of the fibers increased.
The oxidation reaction of Nylon-6 fiber caused by exposure was studied in terms of the change in the exothermic peak of differential thermal analysis (DTA) curves. It was found that this DTA method served as a very sensitive test for the oxidation of its fiber.
Electron micrographs of the surface replicas of these fibers showed that the fibrillar structure of the original fiber became obscure and the surface roughness increased with increasing exposure. The surface changes may be attributed to the fact that the water soluble products were formed by oxidative degradation and were eliminated during exposure.抄録全体を表示PDF形式でダウンロード (1204K) -
高橋 璋, 高橋 史朗1973 年 29 巻 7 号 p. T280-T284
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーCrystalline cellulose I (CI) and amorphous cellulose II (CII) samples were treated with two kinds of NO2 which had been prepared by dry distillation of lead nitrate (P-NO2) and by reduction of nitric acid with arsenic trioxide (A-NO2). The oxidation mechanism of cellulose with NO2 was considered on the basis of changes in the contents of the functional groups and in the fine structures.
CII sample was more easily oxidized and nitrated with NO2 that the CI sample.
When a small amount of H20 was mixed with NO2, the extent of oxidation decreased, and the nitration increased.
On reacting with NO2, the ratios of Ic=o/INO2 of the products increased initially, and became constant after 7hrs. The constant values of CI and CII samples oxidized with P-NO2 were 2.5 and 4 times greater than those of CI and CII samples oxidized with A-NO2, respectively.
The results of x-ray diffraction and deuteration indicated that the reaction of cellulose with NO2 proceeded rapidly at first in the amorphous region and then slowly in the crystalline regions, and that the reaction of P-NO2 was more homogeneous than that of A-NO2.抄録全体を表示PDF形式でダウンロード (323K) -
岡田 博司, 上野 和義, 滝沢 章1973 年 29 巻 7 号 p. T285-T289
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーEquilibrium water sorption on Nylon 4 and diffusion process of water in the polymer were studied. Water sorptive ability of Nylon 4 is lower than that of regenerated cellulose, higher than that of cotton and three times of that of Nylon 6. The temperature dependence of the sorption isotherm is not significant.
Diffusion coefficient obtained from the permeation experiment depends remarkably on the water content, which is common for the lyophilic polymers. In the case of water content 0.19g/g, Arrhenius_??_ plot of diffusion coefficients has an inflection at about 26°C, which is lower than the glass transition temperature. Sorption rate curve is not of Fickian type even at temperatures higher than the glass transition determined by dilatometry.抄録全体を表示PDF形式でダウンロード (253K) -
箕浦 憲彦, 小島 裕, 滝沢 章1973 年 29 巻 7 号 p. T290-T295
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーIn the sorption of a binary mixed vapor on polymers, the method of determining the amount of sorption of each component was studied. Polyvinylalcohol, polyvinylacetate and vinylacetate-vinylalcohol copolymer were used as the sorbent, and water and methylalcohol were used as the sorbate. The experimental results were arranged in a relation of the partial vapor pressure of one component to the amount of sorption under the constant partial vapor pressure of the other component. These sorption behaviors are systematically explained by supposing the effects of the localization of the small molecules with the large heat of sorption on the hydrophilic group of polymers, the plasticization of polymers by the small molecules and the clustering of the small molecules in polymers.抄録全体を表示PDF形式でダウンロード (359K) -
南後 守, 高橋 佐喜雄, 片山 明, 黒木 宣彦1973 年 29 巻 7 号 p. T296-T300
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーThe solubilities of disperse dyes in perchloroethylene have been examined by the concept of the regular solution in order to obtain the basic information on solvent dyeing. The solubilities were determined at 5°C intervals from 5° to 40°C. From these values, the solubilities of the dyes in the super-cooled liquid state were calculated by considering the relative activity.
If the solution is regular, the entropy of mixing should be ideal and the change in the partial molar entropy of the dyes in the mixing process should be expressed by the following equation, where X°11 stands for the solubility of the dye in the liquid state.
The change in the partial molar entropy of the dyes in the mixing process calculated by equation (2) was compared with Δ_??_theo.
Considering the simplicity of the model and the fact that the determination of the relative activity was accompanied by a considerable error, the agreement between theory and experiment was fairly good.抄録全体を表示PDF形式でダウンロード (263K) -
丁子 敬子, 唐沢 幹雄, 寒河江 敏彦, 関戸 実1973 年 29 巻 7 号 p. T301-T307
発行日: 1973/07/10
公開日: 2008/11/28
ジャーナル フリーThe diffusion properties of disperse dyes for nylon 6 and PET films were studied in terms of the apparent diffusion coefficients D and surface dye-concentrations Cs. The roll films5) of nylon 6 and PET were dyed in the dye aqueous solution in presence and absence of a surfactant.
Five disperse dyes; i.e., C. I. Disperse Red 1, Yellow 1, Violet 1, Blue 1 and paminoazobenzene were used after careful purification. Sodium dodecylbenzene sulfonate (SDBS), sodium 2-naphthalene sulfonate-formaldehyde condensates (Disol) and polyoxyethylene dodecylether (LT-20) were chosen as the representatives of anionic and non-ionic surfactants.
Dyeing conditions were as follows: dye concentration; 20mg/l, dyeing temperature; 90°C, dyeing time 25-50min. for nylon 6 film and 25-109hours for PET film, surfactant concentration; 0-4.3g/l.
The results obtained are as follows:
1. For each dye, the surfactant has no remarkable effect on the absorption spectra of both nylon 6 and PET dyed films.
2. In most cases, surface dye-concentrations Cs of each dye in nylon 6 and PET films are found to decrease with increasing concentration of each surfactant.
3. It was found that the diffusion coefficients D of each dye in nylon 6 and PET films are independent of the surfactant concentration in the dye bath, i.e., in spite of the presence of surfactants in dye bath, the diffusion coefficient of each dye in the film is almost the same as that of the dye without the surfactant.
From these results, it may be assumed that the dye-surfactant complex or the dye solubilized into micell of the surfactant in the dye bath are not taken up by the films, and that the addition of the surfactant in the dye bath leads to diminish the effective concentration of the dye for dyeing.
Thus the authors suppose that the process of diffusion of the dyes with and without surfactants in dye bath could be the same.抄録全体を表示PDF形式でダウンロード (461K)
- |<
- <
- 1
- >
- >|