巻号一覧
34 巻, 2 号
選択された号の論文の12件中1～12を表示しています
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1978 年 34 巻 2 号 p. P59a
発行日: 1978年
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (64K) -
1978 年 34 巻 2 号 p. P59b
発行日: 1978年
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (64K) -
ポリアリレート樹脂について朝原 央1978 年 34 巻 2 号 p. P36-P42
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (503K) -
清水 二郎1978 年 34 巻 2 号 p. P43-P52
発行日: 1978/02/10
公開日: 2008/11/28
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山石 健次, 菖蒲 敏太郎, 佐貫 治夫1978 年 34 巻 2 号 p. T49-T52
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーSurface wettabilities of acrylic fibers were measured after heat treatments at various temperatures and conditions. Assessment of fiber's wettability is made by an immersional wetting method, a modification of Hydrometer method. In our method, the weight of sample fiber assembly is measured in distilled water as a function of time elapsed. As sample weight changes with the replacement of air by the liquid, immersional wetting properties of fiber are deduced from the weight measurement.
Results are as follows. Initial velocities of immersional wetting increased extremely for wet heated fibers. This fact indicates that the wettability of the fiber was greatly improved. On the contrary, wettabilities of acrylic fiber decreased with the dry heating temperature. But the decreasing behavior was not simple: Wettability increased for 130-190°G heating, but decreased for the heating over this temperature region. It was inferred that behaviours of heat treated fibers were concerned with the states of AN groups in acrylic fiber.抄録全体を表示PDF形式でダウンロード (846K) -
上出 健二, 真鍋 征一1978 年 34 巻 2 号 p. T53-T63
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーThe delustring phenomena, observed often during heat-treatment of cellulose diacetate (CDA) in hot water, were studied in connection with the molecular characteristics of CDA and the thermal motion of CDA molecules. The phenomena accompany with decreases in (1) density, (2) weight remaining, and (3) storage modulus, and disappeared by treatment of film under high pressure or by dipping it into good solvents for CA with relatively low degree of acetic acid content (AC). The delustring phenomena can be attributed to a change from uniformly packed state of CDA molecules in the original film to highly heterogeneously packed state by dissolution and/or swelling of CA molecules of low acetyl content and of low molecular weight and CA molecules having the groups of sulfonic ester and carboxylic acid as impurities during the course of heat-treatment in hot water. Such a change is closely associated with the microbrownian motion of main chains in the amorphous region. Water molecules act selectively on the CA molecules of low acetyl content and of low molecular weight as a dissolving, swelling, and plastisizing agent.抄録全体を表示PDF形式でダウンロード (914K) -
岩津 徳衛1978 年 34 巻 2 号 p. P53-P59
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (495K) -
清水 二郎, 奥居 徳昌, 金子 明, 鳥海 浩一郎1978 年 34 巻 2 号 p. T64-T71
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーIn order to clarify the effect of the take-up velocity on the high speed melt spinning of PET, the filaments were spun at the take-up velocity 1, 000-7, 000m/min, and at the mass flow rate 7.2-22.3g/min. Two types of spinnerets (0.5mmφ, 4 hole and 0.25mmφ, 16 hole) were employed.
The effects of the melt-draw ratio and the cooling conditions on the fiber diameter along the spinning line were studied from the resultant textures of the spun filaments.
The following results are obtained.
(1) Under the high speed melt spinning, the take-up velocity plays a predominant role in the fiber structure formation, however, the mass flow rate also affects the fiber in its properties in some extent.
(2) The effect of mass flow rate could be explained as the cooling effect according to dicrease in the fiber diameter along the spinning line rather than as the effect of the draft ratio.
(3) As the birefringence of the fiber obtained by the spinning reaches to 0.062-0.068, the cristallinity is increased drastically.抄録全体を表示PDF形式でダウンロード (1003K) -
児玉 峯一, 古橋 靖夫1978 年 34 巻 2 号 p. T72-T76
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーThe dynamic viscoelastic properties of epoxy resin reinforced with short Kevlar fiber in randomplanar orientation were studied above room temperature. The composite reinforced with short E glass fiber in random-planar orientation was also studied for comparison purpose. Above the primary dispersion (α) temperature for the Kavlar reinforced composite, three additional dispersions (α′, α″ and α_??_) are separately observed in the log E″ vs. reciprocal absolute temperature curve. On the other hand, two additional dispersions (α′ and α″) are observed above the α dispersion temperature for the E glass fiber reinforced composite. The α″ and α_??_ dispersions of the Kevlar composite are considered to correspond to the α′ and α″ dispersions of E glass fiber composite, respectively, for which the relaxation mechanisms are deduced in a previous paper4) The α′ dispersion of the Kevlar composite is considered to originate from the friction or slippage among the microfibrils of Kevlar fiber which are formed by the fibrillation or splitting of the fiber surface during the measurement of the dynamic viscoelastic properties.抄録全体を表示PDF形式でダウンロード (360K) -
小佐井 興一, 東野 剛, 西岡 昇1978 年 34 巻 2 号 p. T77-T81
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーThe role of acrylic acid (AA) in the initiation reaction of graft copolymerization of methyl acrylate (MA) and AA onto 6-nylon was investigated using AIBN_??_ as initiator in CaCl2-MeOH solution. Graft efficiency was not influenced by the amount of AIBN, but increased with increases in the concentration of CaCl2 and in the ratio of AA/MA. The efficiency was 23% regardless of the reaction time, except for the initial stage at which it was very high. With benzoylperoxide (BPO) as initiator, poor efficiency resulted due to the presence of CaCl2. However, a redox system, cumene hydroperoxide-l-ascorbic acid and 4, 4′-azobis (4-cyanopentanoic acid) also yielded 23% of graft efficiency. It was concluded from these results that the graft copolymerization is initiated by the extraction of a hydrogen on 6-nylon not by the initiator radicals, but by the primary radicals or the growing polymer radicals predominantly containing AA produced by the attack of initiator radicals to AA. _??_ azobisisobutyronitrile (AIBN)抄録全体を表示PDF形式でダウンロード (292K) -
Asako Hirai, Waichiro Tsuji, Masao Hosono1978 年 34 巻 2 号 p. T82-T87
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーHighly accessible and decrystallized cotton can be prepared by cyanoethylation with acrylonitrile after pretreatment with swelling agents. In this research, cotton fabrics with or without chemical crosslinkages were treated with acrylonitrile after impregnation with 5.4N aqueous sodium hydroxide solution, and some physical properties of the treated cotton were examined. Fairly high moisture regains were obtained. The abrasion resistance of cotton fabrics was increased by the alkaliacrylonitrile treatment. The tensile strength, elongation and moisture regain of treated fabric were increased when the alkali-acrylonitrile treatment was given to chemically crosslinked cotton fabrics, although a small loss in dry crease recovery was caused.抄録全体を表示PDF形式でダウンロード (377K) -
片山 明, 南後 守, 後野 耕治, 黒木 宣彦1978 年 34 巻 2 号 p. T88-T92
発行日: 1978/02/10
公開日: 2008/11/28
ジャーナル フリーThe salting-out phenomenon in water has been investigated referring to the solubility of nonelectrolytes and the proton chemical shift of ethylene glycol in inorganic electrolytes-ethylene glycol solutions. The nonelectrolytes include biphenyl, azobenzen and p-aminoazobenzene; and LiCl, NaCl, NaNO3, NaSCN, NaClO4, KCl and CsCl are used as the inorganic solutes.
The solubility data have been interpreted in terms of the free energy change of transfer from pure to the salt solution (ΔFtrans.). It is found that ΔFtrans. in ethylene glycol is rather indifferent to inorganic electrolyte species as compared with that in water. On the other hand, the proton chemical shift showed that there is not any particular difference in the chemical shifts induced by the inorganic electrolytes between in ethylene glycol and in water.
These results were discussed from the viewpoint of the relationship between the salting-out and the structural regularity of the solvents, and the contribution of “the structural salting-out effect” in the salting-out phenomenon in water was evaluated qualitatively.抄録全体を表示PDF形式でダウンロード (340K)
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