巻号一覧
35 巻, 4 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
- >
- >|
-
中村 好雄1979 年 35 巻 4 号 p. P77-P85
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (680K) -
小口 登1979 年 35 巻 4 号 p. P86-P92
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1523K) -
書上 誠之助1979 年 35 巻 4 号 p. P93-P95
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (237K) -
高橋 重三1979 年 35 巻 4 号 p. T143-T149
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーThe changes of crystal form and lattice spacings observed for the concentrated aqueous solution of PSLG were studied.
At the PSLG concentration lower than 60% the crystal form determined from the X-ray diffraction patterns in anisotropic state was pseudo hexagonal. The lattice spacings became shorter with increasing concentration in the range from 48% to 60% and did not change in the PSLG concentration lower than 48%. The relationship between the concentration of PSLG, C in volume fraction and the length of a-axis of hexagonal unit cell, a in Å, was represented by the following formula with a constant K
C=K/a2
The structure of anisotropic PSLG solution below 60% concentration may be regarded as a nematic liquid crystal.
At the PSLG concentration higher than 70%, the crystal form was assigned to the orthorhombic unit cell. The dimensions for 80% PSLG were determined for the rolled film as a=9.26 Å (direction of hydrogen bond) b=13.13 Å (direction of side chain) c=6.7 Å (fiber period).
As the diffraction spot corresponding to the fiber period was not observed, c value was assumed as above.
b value, the distance between (0k0) planes, became shorter with increasing concentration of PSLG, and a value, the distance between (h00) planes, did not change with the concentration. These results were explained by the reduction of lattice spacings due to the decrease in water content between the β-sheets.抄録全体を表示PDF形式でダウンロード (1759K) -
松本 喜代一, 飯尾 大彦1979 年 35 巻 4 号 p. T150-T154
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーThe relationship between the change in molecular orientation and the mechanical properties of polystyrene films prepared by various types of stretching was investigated. The specimens were prepared by stretching hot-pressed films to various ratios by different methods at 120°C and at a rate of 100%/min in a circulating hot air bath. The methods were uniaxial with the free and/or constant width, two-way successively biaxial and simultaneously biaxial stretching. For the estimation of the orientation the birefringences were measured by using a tilting technique and mechanical properties are discussed in terms of stress-strain curves.
The following results were obtained:
(1) The molecular orientation in the films uniaxially stretched with free width is uniaxial with cylindrical symmetry around the stretching axis, and the anisotropy of mechanical properties is greater than that of the others.
(2) For the uniaxially stretched films with constant width, the orientation is roughly biaxial or uniaxial together with more or less planar orientation parallel to the film surface, Thus, the anisotropy of Young's modulus are nearly equal in both the machine and transverse directions.
(3) For the two-way successive-biaxially stretched films, the “balance point of orientation” for the degree of chain orientation agree with the “balance point of mechanical properties” when the ratio of first and second stretchings are equal. Thus, the difference of mechanical property can be related to the difference of molecular orientation.
(4) For the simultaneous-biaxially stretched films, the balanced mechanical properties, which are isotropic in the film plane, are independent of the stretch ratio. The molecular chain shows a random orientation within the film along with a planar orientation parallel to the film surface, as observed for other polymer films. The simultaneous-biaxial stretching is more excellent and preferable to successive-biaxial stretching for polystyrene film.抄録全体を表示PDF形式でダウンロード (416K) -
幡 克美, 十河 村男, 山崎 徹, Truong Quang Trung1979 年 35 巻 4 号 p. T155-T160
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーBagasse (cf. Table 1) was pulped by the oxygen-alkali pulp (OAP) and the ordinary soda pulp (AP) methods under the various conditions (cf. Table 2 and 3) by using a rotating autoclave, and the relations between the results (cf. Table 4 and 6) and the cooking conditions were analyzed by the stepwise regression procedure (cf. Table 5, 7, and 8 and Fig. 1_??_6). The increase in the amount of O2 applied in the OAP method resulted in the higher holocellulose yield and the lower COD of waste liquor.
These two methods were compared in respect of yield, properties of pulp and pH and COD of waste liquor (cf. Fig. 7_??_9 and Table 9 and 10). The yield of OAP was higher than that of AP on the same Kappa number level. COD of the waste liquor of OAP was less than that of the AP waste liquor. Bleached pulp of brightness over 80% was easily obtained by the 2 stage bleaching of a H-D sequence from OAP as well as from AP. The PC number of OAP was smaller than that of AP. OAP method gave pulp of practically the same strength as AP.抄録全体を表示PDF形式でダウンロード (391K) -
片山 明, 南後 守, 滝川 雅雄, 黒木 宣彦1979 年 35 巻 4 号 p. T161-T164
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーThe solvation energy of three disperse dyes in poly (ethylene terephthalate), Mylar#50 (ΔHsolv.f.)was calculated for ethylene glycol, perclene and water from the energy diagram of dyeing process proposed by T. G. Majury. The heat of solution (ΔHsol.s.) and the heat of dyeing (ΔHdye.) were obtained from the measurements of the solubility of the dyes and from the dyeing isotherms of the substrate, respectively.
We could draw the following conclusions from ΔHsolv.f. values. 1) The stabilization of dye molecule in the substrate depend upon the solvation by the substrate polymer chain (25-30 kcal) more than that of solvent (2-5 kcal). 2) ΔHsolv.f. is little influenced by the large change in the polarity of solvents, water to perclene. However, ΔHsolv.f. for ethylene glycol having polar and nonpolar groups is fairly larger than those for water and perclene. 3) ΔHsolv.f. decreases to about 1/10 for water and perclene and to about 1/5 for ethylene glycol, compared with the solvation energy of dye molecule in the solution (ΔHsolv.) 4) There is no relationship between ΔHslfw.f. and the distribution constant of dye between the solution and the substrate.抄録全体を表示PDF形式でダウンロード (276K) -
寺主 一成, 大萩 成男1979 年 35 巻 4 号 p. T165-T172
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーSince basic studies of dyeing have been done so far mainly from the standpoint of physical chemistry with the major emphasis being placed on interpretation of dyeing phenomena itself, the amount of fixed dyestuff in dyed materials have been employed as one of the most useful parameters.
However, from the teleological viewpoint of dyeing it is needless to say that the tinctorial value of dyed materials is the most important factor for evaluation of dyeing.
The relation between the amount of fixed dyestuff and the tinctorial value of dyed material is expressed by, for example, K/S value. The K/S value, like amount of fixed dyestuff, is essentially an achromatic concept and may indicate effectively the relation between fixed dye amount and tinctorial value within a certain range of dye concentration, though it is totally useless when it is used to compare different colors with various hues.
Several methods to express tinctorial values have so far been proposed but it is hard to say they are used widely because of their complicated calculation procedures and limited range of application.
In this study, C* value, which is the tinctorial value of dyed materials, was correlated with K/S value as follows: where mH and nH are constants determined experimentally from the hue. C* calculated by the above equation was found very useful for the evaluation of the tinctorial value of dyed materials including nylon jersey and wool.抄録全体を表示PDF形式でダウンロード (440K) -
今庄 康一, 片山 明, 黒木 宣彦1979 年 35 巻 4 号 p. T173-T176
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーThe interaction of N-methylpyrrolidone with azobenzene in aqueous solutions containing 1 mol/l NaCl, LiCl, NaClO4 and NaSCN has been investigated by means of the solubility measurement of azobenzene. The thermodynamic parameters for the process which consists of the transfer of 1 mole azobenzene from the salt solution to the salt solution containing 6 mol/l N-methylpyrrolidone have been calculated. In the presence of the inorganic salts, the values of ΔF°u-trans were negative. However, the contributions of enthalpy and entropy changes to the free energy change of the process varied with the salt species. It was shown that in the presence of a water structure-breaking salt such as NaClO4 or NaSCN, the value of ΔH°trans was negative and ΔS°u-trans was positive, whereas in the presence of a water structure-making salt such as NaCl or LiCl, the value of Δ°trans was nearly zero and ΔS°u-trans was positive. These facts were interpreted in terms of hydrophobic interactions between the non-polar parts of azobenzene and N-methylpyrrolidone.抄録全体を表示PDF形式でダウンロード (248K) -
山石 健次, 安藤 正好, 佐貫 治夫1979 年 35 巻 4 号 p. T177-T179
発行日: 1979/04/10
公開日: 2008/11/28
ジャーナル フリーWettability of four Nylon homologues was investigated. The contact angles for various liquids and the heat of immersion were measured to detect the surface wetting property and the whole wettability of Nylon polymers, respectively, and the comparison of these properties was made for each Nylon.
The heat of immersion decreases with the increase in the number of carbon atoms per amide group “N”, but surface wettability does not change systematically.抄録全体を表示PDF形式でダウンロード (187K)
- |<
- <
- 1
- >
- >|