巻号一覧
35 巻, 10 号
選択された号の論文の11件中1～11を表示しています
- |<
- <
- 1
- >
- >|
-
石川 左武郎1979 年 35 巻 10 号 p. P271-P276
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (408K) -
新しい国際服の創作は,日本の責務藤井 守一1979 年 35 巻 10 号 p. P277-P282
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (2143K) -
巻 正平1979 年 35 巻 10 号 p. P283-P286
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (312K) -
三浦 義人1979 年 35 巻 10 号 p. P287-P290
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (333K) -
書上 誠之助1979 年 35 巻 10 号 p. P291-P295
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (2685K) -
高速紡糸における繊維構造の発現清水 二郎, 奥居 徳昌, 今井 義隆1979 年 35 巻 10 号 p. T405-T412
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーIsotactic polypropylene filaments have been produced by high speed melt spinning method in the range of take-up velocity from 500 to 7, 000m/min at various extrusion temperatures. The physical and mechanical properties of as-spun fibers and their annealed fibers were studied as a function of take-up velocity. As the take-up velocity increased, the degree of crystallinity and birefringence of as-spun fibers enormously increased, and at the take-up velocities higher than 2, 000m/min, they showed levelling off at about 60% and 25×10-3 respectively. Beyond 2, 000m/min, characteristic changes in fiber properties were also found; drastic increase in initial Young's modulus and thermal contraction, decrease in small angle X-ray scattering intensity and moreover appearance of shoulder melting peak on DSC thermograms at high temperatures. The extrusion temperature affected to some extent on the velocity regions, where the characteristic changes occurred. Various characteristic changes in the properties of the fibers spun at above 2, 000m/min were considered as the results of the changes induced on largely constrained amorphous chains trapped between crystallines when polymer molecules crystallized under high extensional stress during the spinning.抄録全体を表示PDF形式でダウンロード (1351K) -
黒田 亘哉1979 年 35 巻 10 号 p. T413-T418
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーRecently the measurement of permeability of gases through polymer film is utilized as a method to obtain the information about the internal fine structure of polymer solid. In this paper, the permeability coefficients of He, O2 and N2 for several semicrystalline polyester films, crystallized by heat treatment, were determined by an apparatus based on the low vacuum method.
From the data of permeability measurements, it was found that the permeability coefficient was decreased with the increase in the polymer crystallinity.
To obtain the information about the fine structure of amorphous region of the polymer solid, the permeability coefficients of gases for amorphous region of semicrystalline polymer, Pa, were calculated from the permeability data, assuming a structural model of semicrystalline polymer solid. The value of Pa was determined by Pa=P•k/αa, where k is the geometric factor and αa is the volume fraction of amorphous region. Pa value obtained were identical at each temperature for almost all films determined with small gas molecule such as He, but there were also systematic variations with the crystallinity of polymer films for larger gas molecules such as N2 and O2 above Tg of polymer. The correlation of Pa with crystallinity could be explained by the concept of segmental mobility and the number of possible conformational forms of chain molecule existing in amorphous region of polymer, using a suitable assumption to simplify the complicated problems about the chain conformation.
To consider the relation between the permeability coefficient in amorphous region and the dynamic modulus of the polymer at each temperature, which was regarded as a measure of flexibility and mobility of polymer chain segments, log Pa were plotted against log E′ The log Pa vs. log E′ curves were identical for individual gas molecule for each polymer films independent of crystallinity.
From these results, it was concluded that the permeability coefficient was strongly related to the internal fine structure of polymer solid, especially to the segmental mobility of polymer chain molecule and to the number of possible conformations of chain molecule existed in the amorphous region of polymer.抄録全体を表示PDF形式でダウンロード (487K) -
梶山 孝一, 梶田 喜代子1979 年 35 巻 10 号 p. T419-T428
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーIn the previous paper, the correlation between the chemical structures and the retention indices of trifluoroacetyl (TFA), acetyl (Ac) and trimethylsilyl (TMS) derivatives of various O-methylsorbitols was studied on an assumption of the additive contributions of each structural unit to the retention index. It was concluded that the chemical structures had the intimate relation to the retention indices for the three kinds of derivatives of various O-methylsorbitols.
In this paper, the same problem was discussed for TFA and Ac derivatives of various O-ethylsorbitols comparing with the case of 0-methylsorbitols. It was concluded that the chemical structures had the intimate relation to the retention indices as in the case of O-methylsorbitols and the retention behaviour was similar to that of O-methylsorbitols. The difference of the contributions to the retention index between ethyl and methyl group was also investigated from the retention indices of the derivatives of O-ethyl- and O-methylsorbitol.抄録全体を表示PDF形式でダウンロード (767K) -
瀬口 和義, 伊藤 美保子, 樫野 照子1979 年 35 巻 10 号 p. T429-T433
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーEquilibrium uptakes of Orange II on nylon 6 fiber from sixteen protic or dipolar aprotic solvents, were determined in the presence and absence of acid at 50°C. Seven monocarboxylic acids were used.
In a series of protic solvents, the dye uptake in the absence of acid decreased with decreasing dielectric constant (D) of the solvent at first, then increased. Plots of the dye uptake against l/D indicated a minimum at l/D_??_25. Addition of the acid increased the dye uptake markedly and the effect increased with decrease in pKa of the acid. In the presence of monochloroacetic acid, which was a most effective acid, the dye uptake decreased with decrease in the value of D.
These results were interpreted in terms of the change in the dyeing mechanisms due to the polarity of the solvent; ionic interaction between the dye and the substrate plays an important role in the solvents having higher value of D, although the role of dipole interactions (polar van der Waals force) becomes predominant in the solvent having lower value of D. However, in spite of the high D value, the dipolar aprotic solvents other than nitriles inhibited the dye absorption by nylon. The difference in the dyeing behaviors between the nitriles and the other aprotic solvents was interpreted in terms of difference in π-conjugation of the solvents.抄録全体を表示PDF形式でダウンロード (409K) -
萩原 滋子, 松本 喜代一, 内海 暢生1979 年 35 巻 10 号 p. T434-T441
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーThe crystallization of Nylon-6, which is induced by the stretching or heat-treatment in the wet-process, is enhanced by the existence of the dyestuff in the aqueous medium. However, the diffusion of water into amorphous region of Nylon-6 is promoted in the presence of the surfactant in the aqueous medium and it helped the intermiscellar swelling. Consequently the growth of a crystallite in the crystallization process by the heat-treatment is supressed and many fine crystallites are formed.
In this work, the effects of the coexistence of two antipodal solutes (dyestuff and surfactant), on the internal structure of Nylon-6 in the dyeing were investigated. Following two types of Nylon-6 films were used in this experiment, that is, unoriented low crystalline film and uniaxially stretched film (3 x). Sodium dodecyl sulfate (SDS) was used as the surfactant and C. I. Acid Orange 7 or C.I. Disperse Red 4 (Anthraquinone derivatives) were used as the dyestuffs. Dyeing was performed at 70°C for 20 hr.
The following results were obtained;
Nylon-6 has a greater affinity for SDS than for dyestuff, SDS sorbed on the solid interface supressed the growth of crystallite which were formed by the heat crystallization process and great numbers of fine crystallite were formed. But when the dye in molecular state or in minute particles are coexisted with SDS in the dye aqueous solution, the dyestuff was drawn near to solid interface of Nylon-6 by the formation of SDS complex or by the stabilization of the dispresion. And it was captured among the molecular chains of the amorphous region and the neighboring chains seem to be more extented, since the supression on the crystalline growth by SDS was mitigated.
As a result, the dualistic crystallization was observed.抄録全体を表示PDF形式でダウンロード (614K) -
曽根 健夫, 砺波 宏明1979 年 35 巻 10 号 p. T442-T450
発行日: 1979/10/10
公開日: 2008/11/28
ジャーナル フリーIn a previous study it was shown that the rayon fabric in which acid and hydrophobic groups were introduced, indicates good dyeing property for cationic dyes and good colour fastness to washing, but the mechanism of the fastness has not been clarified.
In the present study an attempt was made to introduce the acid and hydrophobic groups into the rayon fabric with a reaction which differs from that in the previous study. The influences on the fastness of the quantities, and the acidity or the hydrophobic character, of acid and hydrophobic groups were also discussed.
Results obtained are as follows:
(1) Although an acid and a hydrophobic group were introduced by carboxy methylation and esterification respectively, good fastness to washing was also obtained like in previous study.
(2) The intensity of acidity of acid groups coexisting with hydrophobic groups gives no influences on the fastness.
(3) The sequence of acid or hydrophobic group introduction into the rayon fabric gives no influences on the fastness.
(4) The fastness seems to correlate to the degree of swelling of the fabric and also depends on the interaction between dyes and fiber as well as on the intermolecular crosslinkage.抄録全体を表示PDF形式でダウンロード (643K)
- |<
- <
- 1
- >
- >|