巻号一覧
44 巻, 12 号
選択された号の論文の13件中1～13を表示しています
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米竹 孝一郎, 古泉 忠由, 増子 徹1988 年 44 巻 12 号 p. 597-605
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPoly (tetramethylene terephthalate) (4GT)-poly (tetramethylene oxide) (PTMO) block copolymer films were drawn at 25°C with draw ratios up to 7 times. These drawn films were shrunk at various temperatures from 25 to 188°C and were redrawn at 25°C, The change in fine structures of the deformed 4GT/PTMO block copolymer films were investigated by X-ray diffraction. The long period (Lp) of the shrunk films decreased with decreasing the draw ratio (λ). The value of Lp of redrawn films increased remarkably at the initial stage of redrawing. The change in Lp against λ indicated a Lp-λ hysteresis in the shrinkage/redrawing processes. The small angle X-ray scattering (SAXS) patterns of relaxed films showed four-point diagrams, and transformed gradually into twopoint ones with an increase in λ during redrawing. These changes in Lp, and SAXS patterns of deformed films suggest that the shrinkage and redrawing processes cause a two-step deformation: the first step is slips between adjacent microfibrils; the second step is the contraction of intermicrofibrillar tie-chains.抄録全体を表示PDF形式でダウンロード (2565K) -
真下 智司, 中嶋 正仁, 山口 良雄, 芦田 道夫1988 年 44 巻 12 号 p. 606-612
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーThe changes in the stress and surface temperature of short-fiber reinforced rubber composites were studied under extensional fatigue with sinusoidal strain. The fatigue test was carried out in the fiber direction at ±0.5%, ±1.5% and ±2.5% of dynamic strain at 25Hz for the composites extended with 5% of static strain.
The extensional fatigue caused the decrease in the stress and the increase in the surface temperature of the composites. In order to examine the effect of heat generation on the change in the stress of the composites, the fatigue test was carried out at the temperatures higher than the maximum surface temperature of the fatigue test at 25°C. The change in the stress of the composites fatigued at the high temperature showed the same tendency as the composite fatigued at 25°C. It seemed that the change in the stress of the composite was caused mainly by the destruction of interfacial region between fiber and rubber matrix. The destruction of interfacial region occurs due to the shear deformation under sinusoidal strain. The stress decreased significantly and the surface temperature increased with increasing dynamic strain. In the case that the bonding between fiber and rubber matrix was poor, the composites were ruptured easily by shear deformation at the interfacial region.抄録全体を表示PDF形式でダウンロード (522K) -
趙 耀明, 庄 慧卿, 黄 茲国, 木村 良晴1988 年 44 巻 12 号 p. 613-619
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーSegment-block poly (ester-ether)s were prepared by the copolycondensations of poly (ethylene terephthalate) (PET) prepolymer, polyethylene glycol (PEG), and mono-p-nonylphenylether of PEG (PON). Three PEGs having different molecular weight, ie., 4, 000 (PEG(4)), 10, 000 (PEG(10)), and 20, 000 (PEG(20)), were utilized with an equal PET/PEG/PON composition of 94/4/2 in weight. The copolymers obtained were found to be terminated by the mono-functional PON segments and to have an almost random sequence of the PEG segments. In the polymers, therefore, little amount of PEO-rich, ethanol-soluble oligomer was involved. The copolymers were then mixed with polymer chips of PET in 1:1 weight ratio, and the blend fibers were spun by the conventional melt-spinning technique. The as-spun fibers were stretched by 4.0 fold in length. The spinnability and the drawability were as high as those of the homo-PET fiber. The antistatic property of the fibers was evaluated by half-life-time of leakage of electrostatic charge t1/2. The value for the blend fibers was in the range of 0.6-3.0 sec, being much shorter than those for the PET fibers blended with PEG alone and the PET-PEG block copolymer (eg., 20-60 sec). After the fibers had been washed in a boiling water for 1hr, the t1/2 value of the former fiber increased to 4-20 sec, indicating a slight deterioration of the property. However, the resistivity against washing for the present blend fiber was much higher than that of the fiber blended with PEO alone due to the stronger anchoring effect of the PEO component copolymerized with PET. The higher antistatic property of the blend PET fibers comprising PET-PEG-PON copolymers was ascribed to the larger phase separation of the block copolymers in the fiber matrix, as observed by the cross sectional SEM micrography of the fibers.抄録全体を表示PDF形式でダウンロード (1430K) -
鈴木 洋正, 石井 美治, 山下 雄也1988 年 44 巻 12 号 p. 620-628
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーThe photofading of disperse dyes in dioxane and on polymer film has been studied in the presence of polymers having 2-(2′-hydroxy-4′-methoxyphenyl) benzotriazol (HBT) and 2-hydroxy-benzophenone (HBP) groups as a ultraviolet absorptive group, 2-(2′-hydroxy-4′-methoxyphenyl) benzotriazole (HMBT) and 2-hydroxy-4-methoxybenzophenone (HMBP).
The quantum yields of photofading of 1-p-Tolylazo-2-naphthol (D1) were measured in dioxane containing above ultraviolet absorbers. Polymer dye (PD) containing 2-Hydroxyphenylazoresorcinol (D2) was used in order to study retarding action of UV absorbers on photofading of rigid D2 unit on polymer. PT was prepared by the reaction of styrene/glycidyl methacrylate copolymer (P) with 2-(2′, 4′-dihydroxyphenyl)benzotriazole. PB and PD was also prepared by the reaction of P with 2, 4-dihydroxybenzophenone and D2, respectively.
Effects of UV absorbers on photofading of Dl in dioxane are summarised as follows. UV absorbers retarded the photofading of the dyes. The protective efficiencies decreased in the following order; PB>PT>HMBT>HMBP. These ultraviolet absorbers also played as a retarder on the photofading of D1 on P film. The effect of these UV absorbers on the photofading of D2 was similar to that of Dl, while in the case of the photofading of PD, monomeric UV ultraviolet absorbers (HMBT and HMBP) were more effective than polymeric UV absorbers (PT and PB) as retarder.
Quantum yield (φ) of photofading of Dl in dioxane was 1.52×10-3 The quantum yield decreased with an increase of the additive concentration (HBT unit and HBP unit conc.). HBT and HBP groups played roles of both quencher and screener. The contribution of quenching effect of polymeric UV absorber was bigger than that of monomeric UV absorber.抄録全体を表示PDF形式でダウンロード (654K) -
曽根 健夫, 長谷川 浩子1988 年 44 巻 12 号 p. 629-633
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーIn previous studies1, 2) it was pointed out that vinylon acetalized with a 20_??_30% solution of sulfuric acid as a catalyst had good dyeing properties with cationic dyes.
This paper concerns with the improvement of the dyeing properties and the wash fastness of the fiber. In order to improve the dyeability and the wash fastness, an acid group was first introduced to poly (vinyl alcohol) (PVA) by acetalization with o-sulfobenzaldehyde and then a hydrophobic group was introduced by acetalization with formaldehyde. The fiber thus prepared showed the deep dyeing properties and the good fastness to light and washing.抄録全体を表示PDF形式でダウンロード (318K) -
大越 豊, 八木 宏, 鳥海 浩一郎, 近田 淳雄1988 年 44 巻 12 号 p. 634-636
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーThe structure and thermal stability of PEEK crystals obtained from solution was investigated. A PEEK chip was dissolved in benzophenone at 280°C, and cooled slowly. In this crystallization process, a membrane was first formed on the surface of solution and then gelation took place at about 220°C. Both the membrane and the gel, extructed with acetone, have high crystallinities and high heat stabilities. Especially, the crystallinity of the membrane is as high as 75%. The membrane and the gel are both porous, but the former has denser structure. The (200) diffraction orients along the normal direction of the membrane surface.抄録全体を表示PDF形式でダウンロード (824K) -
外林 仁志1988 年 44 巻 12 号 p. P460-P466
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (582K) -
土屋 寛1988 年 44 巻 12 号 p. P467-P472
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1115K) -
森下 貞男1988 年 44 巻 12 号 p. P473-P476
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1779K) -
塩崎 知晴1988 年 44 巻 12 号 p. P477-P480
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (995K) -
上中 健夫1988 年 44 巻 12 号 p. P481-P484
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (882K) -
佐々木 坤彪1988 年 44 巻 12 号 p. P485-P486
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (931K) -
工藤 洋輔1988 年 44 巻 12 号 p. P487-P488
発行日: 1988/12/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (795K)
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