巻号一覧
32 巻, 8 号
選択された号の論文の17件中1～17を表示しています
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浜野 太郎1976 年 32 巻 8 号 p. P257-P259
発行日: 1976/08/10
公開日: 2008/11/28
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浅見 忠良1976 年 32 巻 8 号 p. P260-P263
発行日: 1976/08/10
公開日: 2008/11/28
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赤松 昂1976 年 32 巻 8 号 p. P272-P281
発行日: 1976/08/10
公開日: 2008/11/28
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益田 恭1976 年 32 巻 8 号 p. P282-P287
発行日: 1976/08/10
公開日: 2008/11/28
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松井 宏仁1976 年 32 巻 8 号 p. P288-P292
発行日: 1976/08/10
公開日: 2008/11/28
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古井 修1976 年 32 巻 8 号 p. P293-P295
発行日: 1976/08/10
公開日: 2008/11/28
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柿木 英夫1976 年 32 巻 8 号 p. P296-P298
発行日: 1976/08/10
公開日: 2008/11/28
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森田 全三1976 年 32 巻 8 号 p. P299-P301
発行日: 1976/08/10
公開日: 2008/11/28
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武部 猛1976 年 32 巻 8 号 p. P302-P307
発行日: 1976/08/10
公開日: 2008/11/28
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金綱 久明1976 年 32 巻 8 号 p. P308-P310
発行日: 1976/08/10
公開日: 2008/11/28
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山崎 昇, 礪波 宏明1976 年 32 巻 8 号 p. T317-T325
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーAmine-induced crystallization of amorphous PET films during aminolysis was studied. Various alkylamines, ammonia, and hydrazine used made amorphous PET films crystallize; especially amines having the solubility paremeter of nearly 9.5 and 12 crystallized PET films fastly. Decrease of molecular weight during aminolysis increased mobilities of the polymer chains, which also seemed to enhance crystallization.
About the cracks observed on the surfaces of PET films accompanying aminolysis were also studied. These cracks were caused mainly by various strain forces in the films than by dissolution of degradation products into the amines, and occurred at the time of removing the amines. Surface morphologies were changed not only by the wav of removing the amines, but also by the fine structure.抄録全体を表示PDF形式でダウンロード (3935K) -
甲斐 昭1976 年 32 巻 8 号 p. T326-T334
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーThe fine structure of the microfibril of Valonia macrophysa is discussed based on the changes of molecular weight distribution curves, _??_w and_??_w/_??_n of acid hydrolysis residues. Valonia macrophysa was treated with various concentration of NaOH at 20°C for 2 hrs and in few cases for 72 hours. Then, those treated samples were acid hydrolyzed with 4N-HCI at boiling point for different length of time.
The_??_w and _??_w/_??_n were calculated from the distribution curve. The molecular weight distribution of the hydrolysis residue was measured by gel permeation chromatography.
The elution curve of the hydrolysis residue of unmercerized Valonia shows the unimodal curve with the tail in the low molecular weight region. The values are 6000 and 2.47 for leveling off_??_w (leveling off_??_v obtained viscometrically is 2000) and_??_w/_??_n respectively.
The elution curve of the hydrolysis residue of Valonia pre-treated with 0_??_16% concentration of NaOH solutions shows the same unimodal curve as that of unmercerized Valonia, and the quantity of the low molecular weight fractions increase with the increment of NaOH concentration.
The hydrolysis residue of the sample treated with 16_??_20% concentration of NaOH solutions shows bimoda_??_ curve. It is interesting to note that the position of the peak in the high molecular weight region does not shift to low molecular weight region with higher alkaline concentration or longer hydrolysis period, but the area under this peak increases with longer period of hydrolysis, and that in the low molecular weight region decreases. Hence, it is clear that owing to disappearance of the peak in the low molecular weight region, the value of _??_w of a partial mercerized sample becomes eventually equal to the value of leveling off _??_w of unmercerized sample after longer hydrolysis times. The experimental results indicate, in other word, that the microfibril can not be cut in shorter period than about 1 μ calculated from leveling off _??_μ of unmercerized sample.
The elution curve obtained from hydrolysis residue of the sample treated with NaOH solution of concentration more than 20% shows the unimodal distribution curve in the side of low molecular weight.
Changes in the _??_w obtained above correspond with those of _??_v, although both values are not equal.
On the basis of these experiments, it suggests that the Valonia microfibril is composed of extended chains and that defect consisting of chain-end dislocation does not exist at random throughout the microfibril, but generally at intervals of about 1 μ.抄録全体を表示PDF形式でダウンロード (752K) -
坂本 宗仙, 梶山 孝一, 塩崎 英樹, 田中 芳雄1976 年 32 巻 8 号 p. T335-T339
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーSilk and wool fibers were treated with phenyl glycidyl ether (PGE) or p-tolyl glycidyl ether (TGE) in the presence of aqueous neutral salt according to Shiozaki and Tanaka, and the gas-liquid chromatography (GC) of the hydrolysates of the treated silk and wool fibers were studied for the identification and quantification of the artifact amino acids produced. The GC analysis was carried out by the linear temperature-programmed method on OV-17 and on Dexsil 300 GC columns, after the amino acids in the hydrolysate being converted to n-butyl esters of N-trifluoroacetyl (BTFA) derivatives. The peaks of O-(2-hydroxy-3-phenoxypropyl)tyrosine (PGE-TYR) and O-(2-hydroxy-3-p-tolyloxypropyl)tyrosine (TGE-TYR), which were not detected with a conventional automatic amino acid analyzer, were observed in the gas chromatograms of the silk and wool fibers treated with, PGE and TGE, respectively, and the Kováts retention indices of these peaks were determined. The Δ I values of PGE-TYR and TGE-TYR were about equal to each other and much higher than those of O-2-hydroxypropyltyrosine and O-2-hydroxybutyltyrosine, previously reported. The retention indices of TGE-TYR were the highest among those of amino acids ever reported. The GC analysis of the PGE-and TGE-treated wool fibers also indicated that 2, 3-dihydroxypropyl phenyl ether and 2, 3-dihydroxypropyl p-tolyl ether were present in their acid hydrolysates, respectively. This finding clearly demonstrates that, in addition to the tyrosine residues, the acidic amino acid residues in wool react with aryl glycidyl ethers.抄録全体を表示PDF形式でダウンロード (337K) -
梶 加名子, 岡田 紀夫, 桜田 一郎1976 年 32 巻 8 号 p. T340-T346
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーExperiments have been undertaken to graft acrylonitrile onto poly(vinylidene chloride) fiber for the purpose of modifying properties without serious loss of flame-retardance of the original fiber.
The grafting took place smoothly when a suitable swelling agent such as dimethylformamide was used as a medium for the immersion grafting of acrylonitrile by a simultaneous irradiation technique. In most cases, 1:1 mixture of acrylonitrile and dimethylformamide was employed for the reaction and degree of grafting higher than 100% was achieved without difficulty.
Some properties of the graft fibers were measured. The density of poly(vinylidene chloride) fiber is about 1.70, which is the highest among common organic fibers; the value becomes lower by the grafting and the fiber of 100% graft shows a value of 1.40, which is similar to that of polyester. The initial Young's modulus of th fibers increases with grafting. Fiber with 33% graft shows a value of 239 kg/mm2, which is 2.5 times greater than that of the original fiber.
With increasing degree of grafting, the extent of heat shrinkage becomes less and at about 100% graft, the fiber form is retained even at 300°C. Graft fibers are self-extinguishing so long as the graft percentage is less than 74% (Cl content is greater than 43.3%). In the case of poly (vinyl chloride) fabrics grafted with acrylonitrile, the threshold graft percentage is much lower than the poly(vinylidene chloride) grafts and has a value of about 36% which corresponds to a Cl content of about 42%. It seems that 42-43% Cl content is the common threshold for the self-extinguishing of poly(vinylidene chloride) and poly(vinyl chloride) fibers grafted with acrylonitrile.抄録全体を表示PDF形式でダウンロード (530K) -
沢木 汀二, 堀江 勤之助, 梅本 芳朗, 赤松 武敏1976 年 32 巻 8 号 p. T346-T354
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーThe tensile rupture of tire cords in various twists were investigated. The breaking strength-elongation curves were recorded with a synchroscope. The hightensile speed in this investigation was defined as the speed at the rate of 34, 650%/min. extension (57.7cm/sec) and the following results were obtained: (1) In the low tensile speed test (at the rate of 100%/min. extension (0.17cm/sec.)), the breaking strength of a single yarn of two-ply cord decreased with the increments of the twist, and experimental data showed good agreement with the theoretical values by Platt's equation.
(2) The breaking strength-twist curve showed two maximum values in the high tensile speed test for the nylon two-ply cord. One appeared at the value of 0.2 t/cm S twist of a single yarn of two-ply cord, and one at the value of 1.2 t/cm Z twist of a single yarn of its cord, respectively.
(3) The values of tan S corresponding to various twists of two-ply cord were found to have a correlation with the breaking strength of its cord in varied twists.抄録全体を表示PDF形式でダウンロード (1121K) -
島崎 恒蔵, 清水 二郎1976 年 32 巻 8 号 p. T355-T358
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーThe temperature distribution of hollow filament during melt spinning was obtained by simultaneously solving the thermal conductive equation of air and that of polymer.
The result shows that under the condition of transverse cooling air, the temperature distribution of hollow filament forms the asymmetric pattern, but its shape and temperature difference vary from the case of ordinary filament.
The high crimp tendency observed in the polypropylene hollow fiber is considered to be related with the result obtained in this paper.抄録全体を表示PDF形式でダウンロード (270K) -
森 昇, 立石 俊宏, 溝口 和雄1976 年 32 巻 8 号 p. T359-T363
発行日: 1976/08/10
公開日: 2008/11/28
ジャーナル フリーThe decrease of the amount of formaldehyde liberated from resin finished fabrics and fabrics that absorbed formaldehyde vapor by dipping in water or washing was investigated. The decrease of liberated formaldehyde from resin finished fabrics by dipping in water or washing was observed less than that from fabrics absorbing formaldehyde vapor. The effect of the temperature of water is much greater than the time of dipping.
No significant difference is observed between effects of dipping and those of washing. On the other hand, the concentration of absorbed formaldehyde from dress shirts containing formaldehyde by underwears while wearing is very low, and almost no formaldehyde is recognized after washing.抄録全体を表示PDF形式でダウンロード (324K)
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