巻号一覧
29 巻, 9 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
- >
- >|
-
林 寿郎1973 年 29 巻 9 号 p. P283-P290
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (557K) -
川島 順1973 年 29 巻 9 号 p. P291-P298
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (477K) -
平川 董1973 年 29 巻 9 号 p. P299-P306
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1503K) -
大沢 直志, 中山 晃, 三平 和雄1973 年 29 巻 9 号 p. T363-T367
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーThe relationship between the extensional and compressional behaviors of the fabrics in the fabric plane was investigated by the following method:
A fabric, which has an unknown young's modulus was laminated with homogeneous plastic film of which young's modulus is known. The flexural rigidity of the laminated fabric GL was directly measured by the cantilever method, by using the formula:- where G is the flexural rigidity, t the thickness, and subscripts 0, s and L present the plastic film, the sample fabric and the laminated fabric, respectively. When the experimental value GL is obtained, Gs, is calculated from the above formula using the known values G0., t0 and ts. Therefore, the relationship between the apparent compressional young's modulus (Es)c and the extensional young's modulus (Es)t could be expressed as the ratio of both modulii:
where (Gs)c, and (Gs)t are the flexural rigidities of the fabric for the compression and extension in the course of the bending the laminated fabric, respectively.
This method was applied to the woven, non-woven and knitted fabrics.抄録全体を表示PDF形式でダウンロード (315K) -
稲垣 勝彦, 赤川 直亮, 須田 紀子1973 年 29 巻 9 号 p. T368-T376
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーFew investigations on the quality of fabric luster has been made, and “Micro luster” given by M. Sawaji1) seems to be the only method to express the quality.
In the previous paper4), we thought that the main factor controling the quality of fabric luster was the internal reflecting element from heaped fiber bundle in the fabric, and a method using “polarized light”. It is considered that there are some differences in the conception between our polarized light and micro luster methods.
In present paper, the relation between both methods and the physical meaning of the quality of fabric luster are discussed by means of visual test and measurement of microscopical reflecting properties of fabric.
Main results obtained are as follows:
The conception of two methods (“micro luster” and “polarized light”) are similar.
The quality of fabric luster is characterized by two factors. One is the reflecting coefficient of reflecting element from fabric that possesses the directionality and the other the diffused element from fabric.
This is consistent with the conceptions of the above two methods.
On the basis of these results, one can obtain the meanings for the visual estimating terms of the quality of fabric luster.抄録全体を表示PDF形式でダウンロード (2120K) -
松本 喜代一, 泉 由美子, 今村 力造1973 年 29 巻 9 号 p. T377-T383
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーThe previous reports (parts 10 & 11) in this series discussed the effects of crystal orientation on the mechanical properties of the biaxially stretched poly (ethylene terephthalate) films prepared by dry-process. In this report, our interest is concentrated into the effect of molecular orientation and amorphous chain orientation.
The samples, stretching system and conditions used in this study are the same as those in the previous reports. The molecular orientation in these stretched films were followed up by the birefringence measurement and the infrared dichroism measurement. A tilting specimen method was used in the birefringence.
The following results were obtained:
(1) The molecular orientation in the films uniaxially stretched under free width is uniaxial with cylindrical symmetry around the stretching direction, and the orientation is higher for the crystalline than for the amorphous.
(2) In the films uniaxially stretched under constnant width the molecular orientation is roughly biaxial.
(3) In the two-way successively biaxially stretched films, the molecular orientation changes during the second-direction stretching. The crystal orientation is higher than that of the amorphous segments. Therefore for poly (ethylene terephthalate) film, it is difficult to make all mechanical properties in balanced state by two-way successive biaxial stretching.
(4) In the simultaneously biaxially stretched films, the molecular chain orientation is in balance in the machine and the transverse direction at all stretch ratio, and the orientation is at random in the film plane. And, the molecular chain orients in the same direction to the crystal c-axis. The crystalline and the amorphous chains are randomly oriented in the plane.抄録全体を表示PDF形式でダウンロード (534K) -
小西 孝, 滝 文夫, 谷田 亀寿郎, 加藤 孝司, 黒川 昌孝1973 年 29 巻 9 号 p. T384-T391
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーThe deformation bands are formed in the rolled planes of the drawn and rolled nylon 6 and 6.10 filaments, compressed at above 100°C perpendicular to the rolled planes. We examined the effects on the formation of deformation bands, such as temperature of compression, temperature of annealing of the specimens, regain of the specimen and dimensional changes of the specimens caused by the compression. Higher the temperature of compression is, more deformation bands are formed. Deformation bands are formed more easily with decreasing crystallinity and increasing regain.
Breaking strength and elongation of the compressed specimen with deformation bands were examined. Cracks are initiated at the deformation bands and the breaking strength of these specimens decreases. Especially its value decreases remarkably for the specimen compressed at above 150°C and reaches about 10Kg/mm2 for that compressed at 180°C. Water absorbed storngly influences the formation of deformation bands, and decreases the breaking strength. Compression at high temperature gives rise to the structural changes, such as disorientation of the crystallites and change of density, and the lowering of the strength may be due to not only the formation of deformation bands but also to these structural changes.
Deformation bands formed by the bending deformation at high temperature were also examined. Similar results were obtained for the formation of deformation bands and the lowering of the strength.抄録全体を表示PDF形式でダウンロード (3095K) -
川口 洋一, 島田 将慶, 藤本 典秀1973 年 29 巻 9 号 p. T392-T404
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーPhysical properties of poly (meta, para-xylylene adipamide) copolymer, i.e., melting point (Tm), glass transition point (Tg), density, crystal structure and rate of crystallization have been studied with respect to the content of para component.
(1) The Tm and Tg of the copolymer are written, as a function of the para content (x, mol%) as follows: Tm (°K)=0.67X+508 Tg (°K)=0.33X+353
The densities of the amorphous and the crystalline parts of the polymer are 1.1960g/cc and 1.2510g/cc, respectively, without respect to the content of copolymer unit. The result suggests a good compatibility between meta and para components, reflecting isomorphous behaviours of the copolymer.
(2) Introduction of para component brings about distortion of crystal lattice, but the volume of the unit cell is kept at constant. This corresponds to the fact that the crystal density is same for both homopolymers and copolymers.
(3) The maximum rates of crystallization observed are 6.80×10-1 min-1 at 170°C for homopolymer and 8.58 min-1 at 180°C for copolymer of 27mole% para content, respectively.
(4) The birefringence of poly (meta-xylylene adipamide) under the ideal orientation calculated is 98.9×10-3 from Bunns' bond polarizability whereas that observed for highly oriented fiber is about 80×10-3.抄録全体を表示PDF形式でダウンロード (832K) -
宮田 奈美子, 坂田 功, 千手 諒一1973 年 29 巻 9 号 p. T405-T411
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーIn order to obtain cellulose graft copolymers in which the degree of polymerization (DP) of grafted branches and the branching density (number of grafted branches) are widely varied, the grafting of methyl methacrylate (MMA) onto the cellulose methacrylate was studied.
Cellulose methacrylate was synthesized by reaction of cellulose (bleached kraft pulp of hard wood, LBKP) with methacryloyl chloride, and then subjected to the grafting of MMA using benzoyl peroxide (BPO) as an initiator in several solvents. Effects of solvents, the composition of solvent mixtures, the degree of substitution (DS) of the ester group, the concentration of the initiator and the addition of lauryl mercaptane (LSH) as a regulator on the DP of the grafted branches and the branching density were examined.
The following results were obtained:
(1) The reciprocal of the DP of the branches was proportional to the square-root of the DS of the ester group, the concentration of BPO and of LSH, respectively.
(2) The DP and the branching density were found to depend remarkably on the composition of solvent mixtures and on the amount of added LSH. At the same degree of grafting of 60% the DP was found to be 35, 000 in the aqueous 60% dioxane solution, and decreased to several hundreds by the addition of LSH to methanol. Namely the DP was 380 at 9.3×10-2 mol/l of LSH. The branching density widely changed from 1.6×10-7 to 1.5×10-5 mol/g. pulp.
Thus, among the cellulose MMA graft copolymers obtained in this work, the DP and the branching density of the grafted branches changed by a factor of about 100 at the same degree of grafting.抄録全体を表示PDF形式でダウンロード (476K) -
三石 賢, 石井 直子, 橋爪 美恵子1973 年 29 巻 9 号 p. T412-T417
発行日: 1973/09/10
公開日: 2008/11/28
ジャーナル フリーThe reactions between the dyes having sulfonic groups and the alkyltrimethylammonium bromides (ATB) in the solution have been examined quantitatively by means of conductometric method at 15, 25 and 35°C. The dyes having larger nonpolar groups was found to interact with the ATB having smaller alkyl groups. The molecules with small nonpolar groups, e. g. sulfanilic acid, was found not to interact with any ATB having large nonpolar groups. The complex formed by the reactions of the dyes having large nonpolar groups was slightly water soluble. The thermodynamic properties of the reactions shows that the reactions between them are dependent on not only the electrostatic interactions between oppositely charged ions, but also on the interactions between the nonpolar groups of the dyes and ATB.抄録全体を表示PDF形式でダウンロード (411K)
- |<
- <
- 1
- >
- >|