巻号一覧
32 巻, 5 号
選択された号の論文の11件中1～11を表示しています
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緒方 直哉1976 年 32 巻 5 号 p. P142-P149
発行日: 1976/05/10
公開日: 2008/11/28
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布目 順郎1976 年 32 巻 5 号 p. P150-P156
発行日: 1976/05/10
公開日: 2008/11/28
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伊藤 光二1976 年 32 巻 5 号 p. P157-P164
発行日: 1976/05/10
公開日: 2008/11/28
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上出 健二1976 年 32 巻 5 号 p. P170-P175
発行日: 1976/05/10
公開日: 2008/11/28
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清造 剛, 長沢 幸進1976 年 32 巻 5 号 p. T187-T193
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーNylon 66 copolymers were prepared by substitutions up to 50 mol%, of diacid comonomers: terephthalic acid (T), isophthalic acid (I) and 1, 2-diphenoxyethane-p, p′-dicarboxylic acid (B), and diamine comonomers: p-xylylenediamine (PXD), m-xylylenediamine (MXD), p-phenylenediamine (P), m-phenylenediamine (M), 4, 4′-diaminodiphenylmethane (C), 4, 4′-diaminodiphenylether (0), 4, 4′-diaminodiphenylsulfone (S) and piperazine (Pip). The amorphous samples of these copolymers were subjected to the following measurements: glass transition temperature (Tg) and cold crystallization temperature (Tcc) by DTA method, and density.
Tg's of N66-6I and N66-MXD6 conform to Gibbs-Dimarzio's equation and Wood's equation, whereas Tg's and densities of p-phenylene type copolymers (N66-6T, N66-PXD6 and N66-P6) are higher than those of corresponding m-phenylene type copolymers (N66-6I, N66-MXD6 and N66-M6). Tg's and densities of pdiphenylenediamine type copolymers increase in the following order: N66-C6<N66-06<N66-S6. Tg's of N66-6B are lower than those of above p-diphenylenediamine type copolymers. Tg's of N66-Pip6 are lowest among the copolymers studied. (Tg-Tcc) of N66-6T and N66-PXD6 are lower than those of N66-6I, N66-MXD6, N610-6T and N610-6I, which suggests that N66-PXD6 is isomorphous. The isomorphism of N66-PXD6 is supported by the fact that the results of dynamic viscoelastic measurement are similar to those of isomorphous N66-6T.抄録全体を表示PDF形式でダウンロード (502K) -
大村 寧1976 年 32 巻 5 号 p. T194-T200
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーIn order to gain a better understanding of the “hardness” of flexible polyurethane foams, it is necessary to take the knowledge of local compression characteristics of this materials, for the reason that the foams are compressed locally with the palm of the panel's hand in subjective handling. In the present report, the local compression tests within the range of elastic limits were carried out and on the basis of the above experimental results, the relations between local compression characteristics related to “hardness” and compressive modulus are discussed.
The results obtained are as follows:
1) When the boundary plane surface of foam was compressed locally by force of P with the cylindric indenter having a radius of a, the forced-in depth hz of the indenter can be expressed as,
Where, δz is the body constant of foam related to hz.
2) Relations between local compression characteristics δz, the gradient Vp of compressive stress in the first linear part of S-S curves and compressive modulus Yz are as follows;
Where, H is the thickness of specimen used for local compression test.
3) As for physical properties correlating closely to the subjective rating Sh, of “hardness”, 1/δz, Vp at H/a=const. and Yz are equivalents.
4) Flexible polyurethane foams are transversely isotropic, but as for hz, it's permissible to treat them isotropic.
5) On the compressibility kp(=dV/dP) defined by K. Mihira et al7), as the measure of “hardness” of isolated foam substances, the value of its reciprocal number is correlated closely with Sh in flexible polyurethane foam. (V is the dent volume in local compression)抄録全体を表示PDF形式でダウンロード (479K) -
小西 孝, 加藤 孝司, 黒川 昌孝1976 年 32 巻 5 号 p. T200-T206
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーWhen the doubly oriented nylon 6 monofilaments were compressed perpendicular to the rolling plane at high temperature, the deformation bands were formed in the rolling plane. By means of SAXS, WAXS and tensile tests, the structural changes in deformation bands of the nylon 6 were investigated.
The long period of the doubly oriented nylon 6 changed very little up to 160°C which is the temperature of compressing. It seems that the tilt of lamella plane is arisen correlatively for the shrinkage in the direction of fiber axis by compression. The tilting angle of the lamella plane (φ) was approximately indirectly proportional to the compression ratio perpendicular to the rolling plane. On the other hand, the lamella plane of the doubly oriented nylon 6 of the high degrees of crystallinity was tilted very little by compression.
As the compressing temperature increases, (200) reflection of the doubly oriented specimen was disoriented, however, the orientation of (002) reflection was unchanged. The IR1 decreased up to 160°C which is the temperature of compressing.
The strength of compressed doubly oriented nylon 6 in the wet state decreased up to 100 C and in the dry state decreased up to 160 C which were the temperature of compressing in the direction to the rolling plane.抄録全体を表示PDF形式でダウンロード (1091K) -
萩原 応至, 石川 欣造1976 年 32 巻 5 号 p. T206-T209
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーThe mechanical properties of regenerated silk fibroin films were studied in relation to the effect of water. The sorption isotherm was separated into an absorption curve C1 and a dissolution curve C2. The amount of sorbed water in film at various humidities was more than that of silk fiber. From the BET plot obtained from the S-shaped sorption isotherm, the internal surface area Vm was calculated to be 218m2/g. A composite curve could be obtained by shifting stress relaxation curves at various humidities along the logarithm time axis.
This shows that the time-humidity superposition is well adapted for fibroin.
The relation between the shift factor ac and water content was expressed by Fujita-Kishimoto's equation, which is based on the free volume theory. The increase of free volume was only effected by C2 component of sorbed water. The parameter β calculated from Fujita-Kishimoto's equation was 0.06 in the range of C2 from 0 to 0.06 (0-55% R. H.) and 0.16 in the range of C2 higher than 0.06 (55% R. H.). The change of the parameter β may indicate an abrupt increase of the mobility of chain segments at about 55% R. H.抄録全体を表示PDF形式でダウンロード (638K) -
羽賀 敏雄1976 年 32 巻 5 号 p. T210-T215
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーThe swelling kinetics of poly (ethylene terephthalate) (PET) fiber in chlorinated hydrocarbons was studied as a function of the thermal hystories of the fiber. Two types of non-Fickian anomalous diffusion behavior were exhibited, i.e. (a) Case II diffusion, and (b) the two-step diffusion in which Fickian step followed the first non-Fickian step. Fickian and Case II diffusion mechanisms were operative independently and simultaneously in the first step in most of the behavior (b). The diffusion coefficient D and the penetration velocity v were calculated using Kwei's equation. The magnitude of D obtained was in the same order as that in the swollen polymer systems.
The swelling behavior observed was discussed qualitatively in terms of the microstructure of the amorphous regions of PET fiber. It has been inferred that Fickian and Case II mechanisms are independently operative in the different parts in the amorphous regions. In addition, it has been suggested that the lateral order distribution of the amorphous regions annealed under the fixed condition is less uniform than that obtained under the relaxed condition.抄録全体を表示PDF形式でダウンロード (453K) -
尾本 貢一, 岡田 幸雄, 寺西 英樹, 堀 照夫, 清水 融1976 年 32 巻 5 号 p. T216-T222
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーPenetration of aqueous sodium carboxymethylcellulose (Na-CMC) solution behaving as non-newtonian flow into filter paper and polyester fabrics was investigated from the point of the flow property.
Assuming the Ostwald's law for the description of flow property of Na-CMC solution, the applicability of the modified Hagen-Poisenille's equation was examined.
where h0: Penetrated distance in time t
R: Radius of capillary
γ: Surface tension of liquid
θ: Contact angle
n, k: Constant
The results obtained were as follows:
1) The applicability of the above equation was shown for the penetration into glass capillary, by employing an approximation for gravity effect of newtonian flow.
2) For penetration into filter paper and polyester fabrics, complete separation of water from the solution did not occur because of remarkable hydration of Na-CMC molecules.
But for the concentrated solution of Na-CMC, especially with small degree of substitution, the abnormal penetration behavior observed made it difficult to examine the applicability of the equation.
3) The equation was satisfactory applied to highly substituted Na-CMC solution in the concentration range where abnormal solution penetration does not occur.抄録全体を表示PDF形式でダウンロード (398K) -
上出 健二, 今中 明子1976 年 32 巻 5 号 p. T223-T225
発行日: 1976/05/10
公開日: 2008/11/28
ジャーナル フリーEquilibrium melting temperature T°m of poly ε-caprolactam (Nylon 6) fractions having the numberaverage molecular weight _??_n from 1.93×104 to 4.15×104 was evaluated according to the so-called annealing method proposed by Kamide (Kobunshi Kagaku, 25, 532 (1968)). For this purpose, apparent melting temperature Tm and the heat of fusion ΔH were determined by differential scanning calorimetry for the samples annealed at temperatures just below Tm of the untreated sample for various length of time. T°m=235.9°C, 236.4°C and 236.6°C were obtained for _??_n=1.93×104, 3.56×104 and 4.15×104, respectively.抄録全体を表示PDF形式でダウンロード (205K)
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