巻号一覧
51 巻, 2 号
選択された号の論文の14件中1～14を表示しています
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宮下 憲和, 高佐 健治, 天野 敏彦1995 年 51 巻 2 号 p. 51-61
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーThe transparent polyoxymethylene balance films were formed by a three-stage process, rolling and successive biaxial stretching. The orientational change of the films was studied by wide-and small-angle X-ray diffraction methods at every stage during the deformation process. These X-ray data indicate that the orientational structure generated in the previous stage tends to exist to some extent, depending upon the temperature and the deformation ratio during the deformation. The end products _??_λ1=2.5, λ2=10, λ3=4.0:λ indicates the deformation ratio. Suffix 1, 2, 3 show the deformation stages, rolling, stretching to the machine direction (MD), and stretching to the transverse direction (TD). respectively._??_ consist of a mixture of two components having different double orientations. The (100) crystal planes were commonly on the film planes, but the c-axes were oriented parallel to the each draw direction of the stage. During the rolling process, the lamellar structure first developed in the cast sheet was broken. This change plays an important role for the structural formation in the following stages. During the stretching process to MD and to TD, the normal direction of lamellar planes rather tilted to the each draw direction at low and middle deformation ratio. The decrease in the lamellar size and the c-axes alignment along the each draw direction were observed in the range at middle and high deformation ratio.抄録全体を表示PDF形式でダウンロード (1596K) -
Masakazu Konda, Yoshiharu Kimura, Toshio Kitao1995 年 51 巻 2 号 p. 62-71
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーThe dynamic mechanical properties of bisphenol A polycarbonate (BPA-PC: poly (oxycarbonyloxy-1, 4-phenyleneisopropylidene-1, 4-phenylene)) and bisphenol AP polycarbonate (BPAP-PC: poly (oxycarbonyloxy-1, 4-phenylene-1-phenyl-1, 1-ethylidene-1, 4-phenylene)) were measured, and the differences in their dynamic mechanical relaxation were analyzed based on the conformational changes and subunit rotations estimated by MM2. The results indicated that the partial rotations of the carbonate and oxycarbonyl groups have low energy barrier and are reasonably ascribed to the major modes of the γ relaxation of both BPA-PC and BPAP-PC. In BPA-PC these rotations should be conjugated with the rotation of the phenylene groups to allow the low temperature relaxation which follows the γ relaxation. The correlated double rotations and flip-flop rotations of the phenylene groups as well as the full rotations of the carbonate may be responsible for the β relaxations of both polycarbonates which may lead to the α relaxations at higher temperature. The excellent toughness of BPA-PC is ascribed to these various modes of partial rotations of the carbonate and the phenylene groups by which the occurring inner stress can be diffused.抄録全体を表示PDF形式でダウンロード (1930K) -
福田 光完, 宮川 眞利子, 河合 弘迪1995 年 51 巻 2 号 p. 72-78
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーMoisture sorption properties of silk fibroin fibers modified with n-butyl isocyanate were investigated. The equilibrium moisture regain was decreased in the whole range of relative humidity with the increase in the degree of substitution (D. S.) of -OH groups of amino acid residue to form urethane linkages. The X-ray diffraction intensity distribution and the degree of crystallinity were not changed by the modification. The decrease in the moisture regain was due to the selective substitution of -OH groups of Ser, Thr or Try residues and these amino acids residues showed large contributions to the moisture regain. However, the moles of the sorbed water per peptide bond, [H2O]/[CONH], for treated (D. S., 68%) silk fiber were lower than that for polyglycine. The underestimation of the degree of crystallinity was one possible reason and another was that the introduction of the bulky group in the molecular chain might cause the rearrangement of the three dimensional structure in the amorphous region resulting in the formation of the hydrogen bonding between the peptide bonds or the protection of the peptide bonds from the water molecules. The heat of wetting for the dry silk fiber rapidly decreased in the low D. S. range indicating that the interaction between the water molecules and the -OH groups, especially of Ser residues, was stronger than the case of other polar amino acid residues.抄録全体を表示PDF形式でダウンロード (552K) -
牛腸 ヒロミ, 中島 利誠1995 年 51 巻 2 号 p. 79-85
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーSorption isotherms of eight kinds of terpenoids on Merino wool fiber in the temperature range 60°C. 105°C were measured with the inverse gas chromatography. All of the isotherms appeared to be BET III type. These isotherms were analysed in terms of BET equation with two parameters, monolayer content, Nm and adsorptive energy factor, C. The BET plots gave straight lines for all terpenoids. For myrcene and citronellol, Nm values were 5.6×10-5g/g and 8.2×10-5g/g, respectively and C values were about 2. For other six terpenoids, Nm values were in the order of 10-4g/g and C values were 0.3-1. For all terpenoids, Nm values were constant in the temperature range. These results indicate that the terpenoids are adsorbed on the adsorptive sites on the wool surface in the ratio of the area, ca. 10-5, with adsorptive energies 1-3kJ/mol higher or lower than the liquefaction energies. and then condense.抄録全体を表示PDF形式でダウンロード (484K) -
川瀬 徳三, 花田 幸子, 藤井 富美子, 皆川 基, 沢田 英夫, 松本 竹男, 森屋 泰夫1995 年 51 巻 2 号 p. 86-94
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPerfluoroalkanoyl peroxides (PFPO) were applyed to the surface modification of silk fabrics. The modification with PFPO proceeded under quite moderate conditions. PFPO reacted specifically with tyrosine residues of silk on the surface, and hydrophobic perfluoroalkyl groups were introduced to the surface effectively. The modification with PFPO influenced the wettability and electrostatic property of silk fabric. Based on the results of ESCA analysis, the amounts of fluorine atoms on the surface were less than those by the CF4 plasma modification. Moreover, the PFPO modification did not influence significantly the bulk properties, such as tensile stress and fabric hand. On the other hand, the PFPO modification lowered the light-resistance of silk. A possible reason was proposed based on a molecular orbital calculation for perfluoroalkyl-substituted tyrosine.抄録全体を表示PDF形式でダウンロード (1031K) -
Tetsuo Imai, Kunio Shirai1995 年 51 巻 2 号 p. 95-99
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーIn order to establish the evaluation methods for the light stability of fur products, protein solubilities and amino acid compositions of dyed and un-dyed wool powders were examined after the irradiation of ultraviolet ray. The protein solubility of wool powders in M/20 sodium carbonate at 20°C for 2 h increased with irradiation time, corresponding to the protein deterioration caused by the irradiation. Such a deterioration was also evaluated with the decrease in the content of the half-cystine residue. Two parameters (protein solubility and the decrease in half-cystine) are considered to be adoptable as the indices of protein deterioration of dyed fur products under light irradiation.抄録全体を表示PDF形式でダウンロード (309K) -
神田 拓馬, 木村 元1995 年 51 巻 2 号 p. 100-103
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーIn order to obtain high-strength and high-modulus aramid fibers which are hydrolytically stable at high temperatures and can be applicable to cement reinforcement by autoclave curing, disubstituted benzidines (60-40 mole%) such as 2, 2'-dimethylbenzidine (2, 2'-Di-Me-Bz) and 1, 4-bis(ρ-aminophenoxy) benzene (BAP) (40-60 mole%) were copolymerized with terephthaloyl chloride. The resultant polymer solutions were wet-spun and hot-drawn.
The fibers obtained had good mechanical properties and high hydrolytic stability at high temperatures. A typical example was as follows: the fiber from 2, 2'-Di-Me-Bz/BAP(60/40) terephthalamide had tenacity of 22g/d and initial modulus of 700 g/d and retained 84-92% of tenacity after hydrolysis in aqueous alkaline solution (pH 13.6) for 6 hr at 180°C.抄録全体を表示PDF形式でダウンロード (240K) -
Hideaki Yamada, Tatsuo Yamauchi, Koji Murakami1995 年 51 巻 2 号 p. 104-107
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーVideo microscope equipped with a synchronizing device enables one to carry out simultaneous microscopic observation of deforming process of paper under the standard atmosphere with measurements of tensile load and acoustic emission (AE). No remarkable structural changes were observed at macroscopic level up to the maximum loading, while fiber bond failure has occurred. At the maximum loading, beginning of paper failure was observed at the edge of specimen, and this failure developed to a failure line after the steep falling of tensile load. Lift-off of fibers from the surface was recognized as a distinguishing feature of the structure change during the period after maximum loading.抄録全体を表示PDF形式でダウンロード (1648K) -
稲森 悠平, 金 周永, 須藤 隆一1995 年 51 巻 2 号 p. P37-P43
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1308K) -
丹野 隆雄1995 年 51 巻 2 号 p. P44-P49
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (2024K) -
内藤 泰俊, 神谷 義紀1995 年 51 巻 2 号 p. P50-P54
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (898K) -
中西 俊介, 楠木 喜博1995 年 51 巻 2 号 p. P55-P61
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (1589K) -
本多 宏1995 年 51 巻 2 号 p. P62-P68
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (999K) -
井筒 雅風1995 年 51 巻 2 号 p. P78-P81
発行日: 1995/02/10
公開日: 2008/06/30
ジャーナル フリーPDF形式でダウンロード (2706K)
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