Sen'i Gakkaishi
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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Volume 22, Issue 9
Displaying 1-11 of 11 articles from this issue
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  • STUDIES ON THE MECHANISM OF THE ACTION OF VISCOSE MODIFIER
    (PART II) SKIN STRUCTURE (PART III) STUDY ON THE CONDITION FOR THE FORMATION OF SKIN STRUCTURE USING MODEL FILMS
    Satoru Obuchi, Shingo Fujiwara, Kuniji Kobayashi, Masami Ishikawa, Hei ...
    1966 Volume 22 Issue 9 Pages 393-407
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.393
    JOURNAL FREE ACCESS
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  • CHARACTER OF DEFORMATION AND BREAK-DOWN OF ISOTACTIC POLYPROPYLENE SPHERULITE OVER THE TEMPERATURE RANGE BETWEEN-70°C AND+145°C
    Kenji Kamide, Tsugie Hoshino
    1966 Volume 22 Issue 9 Pages 408-414
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.408
    JOURNAL FREE ACCESS
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    In this paper effect of molecular weight and of temperature of isothermal crystallization on the characteristics of the deformation and break-down of isotactic polypropylene spherulite was investigated over the range of temperature between -70°C and+145°C in connection with the mobility of polymeric chains in crystalline form and with macroscopic stretchability of films.
    Two kinds of fractions of molecular weight of 2.64×105 and 1.03×106 were melted at 250_??_290°C, then, were isothermally crystallized at 120_??_150°C to get the well-developed spherulites. Film was stretched under the microscope.
    Deformation and break-down process of spherulite were able to be phenomelogically classified into five peculiarities as follows: (1). Brittle break-down, (2). Fracture with the cleavage of interfacial boundary. (3). Break-down with necking. (4). Plastic deformation. (5). Large plastic deformation into fibrillike structure.
    Comparing spherulites of different molecular weight which were crystallized under the same condition, the increase in molecular weight gave a tendency of occuring (4) and (5). Fractions of the occurrence of (4) and (5) within the total number of deformed or breaked-down spherulites increased with rising crystallization temperature for film of same molecular weight. Maximum frequency of occurrence of (5) was observed qualitatively at the dispersion temperature of crystalline part which was determined by the dynamic viscoelastic method. And at that temperature optimum stretchability was obtained. It became seen that at temperature below the dispersion temperature spherulite cannot undergo large deformation without destruction, and that there is actually much similiarity between polymers and metals in an enormous role of the properties and dimension of spherulite or crystal grain concerning to the character of displacemental deformation.
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  • EFFECTS OF DISSOLVING CONDITION OF POLYACRYLONITRILE ON SOLUTION VISCOSITY AND ITS STABILITY
    Shuichi Uchiyama
    1966 Volume 22 Issue 9 Pages 415-417
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.415
    JOURNAL FREE ACCESS
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    Acrylonitirle polymer was dissolved by heating the polymer and dimethyl formamide for 1, 2 and 3hrs. at 50°C and then for 1, 2, 3 and 4hrs. at 80°C. Polymer concentration of the solution was 26 wt. %. Then the solution was kept at 50°C for 0, 2, 4 and 6 days and falling ball viscosity was measured. Viscosity increase up to 6 days was calculated.
    The results obtained are as follows:
    1) The dissolving time at 50°C has no influence upon solution viscosity.
    2) The solution dissolved for longer time at 80°C has larger viscosity as well as larger viscosity increase after 6 days.
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  • THE BEHAVIOR OF ACRYLONITRILE POLYMER SOLUTION UNDER HIGH PRESSURE
    Shuichi Uchiyama
    1966 Volume 22 Issue 9 Pages 418-420
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.418
    JOURNAL FREE ACCESS
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    Concentrated dimethyl formamide solution of acrylonitrile ploymer were treated at 50, 80, 100 and 120°C under an atmospheric pressure, 10, 30 and 50(kg/cm2.) gauge in an autoclave and the viscosity of the solution was measured at 50°C.
    The results obtained are as follows:
    1) The viscosity of the solution treated at 50, 80 and 100°C under high pressure do not show any considerable change.
    2) The solution treated at 120°C under high pressure has lower viscosity than the solution treated under an atmospheric pressure.
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  • VISCOELASTIC BEHAVIOR AND SPINNABILITY OF ACRYLONITRILE POLYMER SOLUTION
    Shuichi Uchiyama
    1966 Volume 22 Issue 9 Pages 421-426
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.421
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    Viscoelastic behavior and spinnability of acrylonitrile polymer solution in N, N-dimethyl formamide were measured at 50°C.
    Dynamic viscosity and dynamic elasticity were measured with a rotational oscillational type viscoelastometer.
    The results obtained are as follows:
    1) The solution with higher concentration and larger ηsp/C of polymer has larger dynamic viscosity η′ and larger dynamic elasticity G′.
    2) The spinnability increases as the polymer concentration and ηsp/C of polymer increase.
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  • ON TESTING METHODS OF NONWOVEN FABRICS
    (III) A NEW TESTER OF STIFFNESS AND ITS USE ON NONWOVEN FABRICS
    Seiichiro Ueno, Yoshio Kono, Hiroyuki Kondo
    1966 Volume 22 Issue 9 Pages 427-433
    Published: September 10, 1966
    Released on J-STAGE: November 28, 2008
    DOIhttps://doi.org/10.2115/fiber.22.427
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    A new tester of stiffness was designed and experiments have been made to prove usefulness of this tester on nonwoven fabrics.
    The principle of this tester is based on the “theory of long column” what is so called in “mechanics of materials”
    Investigation of the unique properties of nonwoven fabrics which could not easily be measured by means of the conventional cantilever method and the heart-loop method, for example, the relation between the occurrence of the “snap” phenomena and the percentage of elastic recovery is made possible by this tester. The application of the tester would give some information in using and manufacturing nonwoven fabrics.
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 22 Issue 9 Pages S251-S259
    Published: September 10, 1966
    Released on J-STAGE: March 26, 2009
    DOIhttps://doi.org/10.2115/fiber.22.S251
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 22 Issue 9 Pages S260-S265
    Published: September 10, 1966
    Released on J-STAGE: March 26, 2009
    DOIhttps://doi.org/10.2115/fiber.22.S260
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1966 Volume 22 Issue 9 Pages S266-S273
    Published: September 10, 1966
    Released on J-STAGE: March 26, 2009
    DOIhttps://doi.org/10.2115/fiber.22.S266
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 22 Issue 9 Pages S274-S280
    Published: September 10, 1966
    Released on J-STAGE: March 26, 2009
    DOIhttps://doi.org/10.2115/fiber.22.S274
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1966 Volume 22 Issue 9 Pages S281-S284
    Published: September 10, 1966
    Released on J-STAGE: March 26, 2009
    DOIhttps://doi.org/10.2115/fiber.22.S281
    JOURNAL FREE ACCESS
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