繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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64 巻, 10 号
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  • Structural Study on Aromatic Poly(amic n-alkyl ester)s and Their Derivatives by Solid-State Imidization I.
    Effect of Alkyl Chains on the Structure Change
    Katsuhiro Inomata, Sachi Shimomura, Marika Ogiso, Hiroyasu Hasegawa, H ...
    2008 年 64 巻 10 号 p. 273-278
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.273
    ジャーナル フリー
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    Para-linked rodlike aromatic poly(amic n-alkyl ester)s, in which n-alkyl side chains with various chain lengths were attached on aromatic polyamide, were prepared. Structure of the polyamides and its change during solidstate thermal and chemical imidization reaction were investigated. WAXD photographs revealed that a layered structure consisting of alternating main-chain- and side-chain-segregated layers was formed in the polyamides. After more than 40 mol% alkyl chains were removed from the sample by the imidization, the layered structure was destructed and the produced rodlike polyimide chains formed its crystalline lattice. The alkyl chain length had little influence on the structure change during the imidization.
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  • Structural Study on Aromatic Poly(amic n-alkyl ester)s and Their Derivatives by Solid-State Imidization II.
    Effect of Unremoved Alkyl Chains Attached by Ether Linkage
    Katsuhiro Inomata, Sachi Shimomura, Hiroyasu Hasegawa, Marika Ogiso, ...
    2008 年 64 巻 10 号 p. 279-283
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.279
    ジャーナル フリー
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    Rodlike aromatic copolyamides (CoPA-8), in which some octyloxycarbonyl [H(CH2)8OC(=O)-] side chains of poly(amic octyl ester) (PA-8) were substituted by octyloxy [H(CH2)8O-] groups, were prepared. In CoPA-8, the octyl side chains were attached to the main chain by ether or ester linkage. Structure of CoPA-8 before and after thermal and chemical imidization was investigated, and the results were compared with PA-8. Before the imidization, CoPA-8 formed a layered structure with alternating main-chain and side-chain segregated layers. Because the ether linkage was stable against the imidization reaction, formation of imide ring occurred only at the monomer unit having octyloxycarbonyl group. After imidization at 300deg, the octyloxy groups were removed by thermal degradation, however, the layered structure was still maintained as suggested by wide-angle X-ray diffraction pattern. Effectiveness of the octyl chains attached by ether linkage in order to maintain the layered structure has been discussed.
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  • カラードットを用いた図案作成方法と評価について
    西川 重和, 吉住 真理子, 三宅 肇
    2008 年 64 巻 10 号 p. 284-288
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.284
    ジャーナル フリー
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    The application of moire patterns to clothes was examined in this study. The patterns were made by piling up the same two figures of color dots arranged at points of intersection of square fretwork. The number of patterns became innumerable by changing a rotation angle between the two figures, and none of patterns were the same. It proposed the method of making original patterns in this study. First, a dot is divided into four. Next, the basic figure was obtained by moving the divided dots in the shape of radiation at uniform velocity. The dot of red and blue was used for the color dot. The original patterns were made by piling up two basic figures. 20 samples were prepared for the image test. The images of 20 color samples were analyzed by the factor analysis. The main results are as follows. The image factors of these 20 samples are identified by three factors, i.e., potency, activity and refinement. Both brightness and saturation in the pattern by dots are related to the factor of activity. The factor of refined is related to the division patterns of dots.
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  • 毛髪のガラス転移に伴うエンタルピー緩和と水の作用
    2008 年 64 巻 10 号 p. 289-296
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.289
    ジャーナル フリー
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    Glass transition and enthalpy relaxation behavior of human hair and their dependent on water content and aging time were investigated by means of differential scanning calorimetry (DSC). The obtained values of heat capacity change (dCp) and of execs enthalpy (dH) determined by DSC were used for analyzing the glass transition and the enthalpy relaxation process, respectively. In the relationship between the value of dCp and dH and the water content of hair samples aged for 4 days at various relative humidity, the value of dCp and dH increased to a maximum around 10%-15% water content, and then decreased. when the water content was over 15%. However, in the case of the long storage under the conditions of the constant temperature and humidity, the different relationship was found from that mentioned above. This indicates that dCp and dH at glass transition of hair depend on both the water content and the aging time. So, for the hair samples aged under three storage conditions with the different humidity, the values of dCp and dH for all aged samples was found to change periodically during isothermal aging, and their changes tended to be opposite phase, indicating that the increase of polymer chain mobility increased the extent of the enthalpy relaxation but decreased the extent of heat capacity change. These results suggest that the polymer chain network of glassy state repeated periodically a stable <-> unstable structural transformation through plasticization by water, and that the mobility of the macromolecular chain occurred mainly in a lower cross-linked and higher hydrophilic region of the amorphous components, such as endocuticle, cell membrane complex, intermacrofibril material and nuclear remnants, in hair fiber.
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技術報文
  • The Study on Cotton Fabric Dyeing by Indigo Blue from Baphicacanthus Cusia, Indigofera Tinctoria and Polygonum Tinctorium
    Chonyu Chen, Chiehyi Lin, Hanchieh Wang
    2008 年 64 巻 10 号 p. 297-301
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.297
    ジャーナル フリー
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    In this study, 750 g of Taiwan plant-baphicacanthus cusia, indigofera tinctoria and polygonum tinctorium, with two reducing agents-60 g sodium hydrosulfite and 12 g thiourea dioxide were added to dye the cotton fabric for 60-90 seconds, 1-15 times repeatedly. After this, take the cloth specimen being dyed for 3 minutes with the 15th times to compare with the original cloth for color difference (dE). According to the experiment, with the addition of sodium hydrosulfite, dE value of the baphicacanthus cusia, indigofera tinctoria and polygonum tinctorium specimen was 71.70, 69.57 and 70.91 respectively, while with the addition of thiourea dioxide, the dE value of baphicacanthus cusia, indigofera tinctoria and polygonum tinctorium specimen was 73.43, 68.91 and 65.86 respectively. As for washing fastness test, when indigofera tinctoria was reduced with sodium hydrosulfite, the washing fastness test was rated as grade 3-4. For other specimens, they were just grade 3. In the softness test, when the sodium hydrosulfite was added to indigofera tinctoria, the lowest flexural degree was 5.6 cm. In the ultraviolet resistance test, the sodium hydrosulfite with polygonum tinctorium showed the best result with T% 0.19. The dyed cotton fabric also revealed the characteristic functional peak of indigo blue at 1624 cm-1 via FT-IR test.
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  • ホルムアルデヒド－アセチルアセトン法における DEAE 固相カラムによる共存染料成分の除去効果
    杉本 太, 安藤 博美
    2008 年 64 巻 10 号 p. 302-305
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.302
    ジャーナル フリー
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    The influence of dye concentration on the analysis of free formaldehyde in leathers with low color fastness was studied. The concentration of formaldehyde was measured applying Acetylacetone Color Method (JIS L 1041). After the mixture solution of dye and formaldehyde was extracted with DEAE-column, acetylacetone was added to the sample solution. Consequently, it was found that formaldehyde was not adsorbed by DEAE-column. When the absorbance of the sample solution containing formaldehyde and larger amounts of dye was more than 1.0, the dye in the sample was previously extracted with DEAE-column. The extraction makes it possible to analyze accurately the formaldehyde in the sample. This method was useful to determine free formaldehyde in leathers with low color fastness without any interfering effects of larger amounts of dye, which are contained as a coexistent.
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  • PVAc/FeSO4 複合体ナノ繊維製造に関する研究
    李 根炯, 大澤 道, 李 スミン, 朴 パーク, 金 翼水, 金 管雨, 金 学龍, 渡辺 義見
    2008 年 64 巻 10 号 p. 306-311
    発行日: 2008年
    公開日: 2008/11/15
    DOIhttps://doi.org/10.2115/fiber.64.306
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    Poly(vinyl acetate) (PVAc) composite nanofibers containing different ratio of heptahydrated ferrous sulfate were directly prepared via electrospinning method. The effect of solvent and heptahydrated ferrous sulfate compositions on the resultant fiber morphology was examined. Furthermore, the mechanical properties of pure PVAc nanofibers and PVAc composite nanofibers were examined with universal testing machine. As evidenced by stress-strain curves, the yield stress and tensile strength of PVAc composite nanofibers are much higher than those of pure PVAc due to increase of intramolecular force by forming a charge transfer complex.
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