Kobunshi Kagaku
Online ISSN : 1884-8079
Print ISSN : 0023-2556
ISSN-L : 0023-2556
Volume 13, Issue 134
Displaying 1-7 of 7 articles from this issue
  • I.Discussion on the Fundamental Flow Equations of Viscose
    Saburo Hatakeyama
    1956 Volume 13 Issue 134 Pages 231-237
    Published: June 25, 1956
    Released on J-STAGE: December 22, 2010
    JOURNAL FREE ACCESS
    Many investigators have studied on the fundamental flow equation of viscose up to now. Some of them found out that it agrees with Ostwald's equation.But according to the flow tests conducted by the author recently by changing the component and the condition of Viscose through pipes of various dimension, the relation between r and du/dy have resulted in the form of equation as given below;η¤du dy=-(ι+mιn) This is exactly the same as Murakami's equation introduced in poly vinyl alcohol.Incidentally, n, m, η¤were calculated by means of Sakurada and his coworker's method.
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  • II.On the Flow Equation of Viscose through the Lips of Casting-Hopper
    Saburo Hatakeyama
    1956 Volume 13 Issue 134 Pages 237-242
    Published: June 25, 1956
    Released on J-STAGE: December 22, 2010
    JOURNAL FREE ACCESS
    The flow of viscose through the lips of Casting-Hopper is considered the same in its state as the flow between two parallel plates.Therefore, in the casting hopper test, the relation between total rate of discharge Q and the difference of pressure ΔP has been deduced from the fundamental flow equation of viscose reported previously:
    Q=L/η* [(S/2) 3 (2/3l)ΔP+ (S/2) n+2 (2m/n+2)ΔPn/ln]
    In the above equation the rate of discharge Q was calculated by using n, m, η* obtained in the flow test through the pipe, and which was found to be in conformity with the observed data given at the Casting-Hopper.
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  • VI.Observation of the Diameters of Synthetic Resin Latex Particles
    Mitsuo Fujii, Yasuji Otsuka, Keiichi Togo
    1956 Volume 13 Issue 134 Pages 243-249
    Published: June 25, 1956
    Released on J-STAGE: October 14, 2010
    JOURNAL FREE ACCESS
    The authors have studied the relations between the diameters of synthetic resin latex particles observed under electron microscope and the drying or curing temp.of the latex on the trager.The diameters of the particles dried or cured atΔT<0 (ΔT=drying temp.or curing temp.-film forming temp., Fujii and Otsuka, this journal 12, 93 (1955)) observed from photographs, show true diameters, but atΔT>=0, the diameters increase suddenly.Therefore, to observe the true diameters of the particles under the electron microscope, the latices must be dried under the condition ofΔ<0.
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  • H.Influence of Temperature on the Adhesive Strength of Novolak Resin
    Masuo Fukumura
    1956 Volume 13 Issue 134 Pages 250-255
    Published: June 25, 1956
    Released on J-STAGE: October 14, 2010
    JOURNAL FREE ACCESS
    The Author performed an Oscilloscopic Observation on the Adhesive destruction phenomena in adhesive layer over wide temperature range, where Copper specimens were adhered with Novolak Resins.The Results obtained are as follows: Momentary and prevenient destructions are observed in Adhesion. The value of prevenient destruction percentage shows minimum at the temperature where the adhesive strength increase with temperature, and maximum at low and high temperature. Quantitative relation between thickness of adhesive layer and strength has not been obtained.
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  • III. Analysis for the Adhesive Destruction Oscillograms of Novolak Resin
    Masuo Fukumura
    1956 Volume 13 Issue 134 Pages 256-261
    Published: June 25, 1956
    Released on J-STAGE: October 14, 2010
    JOURNAL FREE ACCESS
    Continued from the last paper, Oscillograms of adhesive destruction has been analysed and the results are derived as follows: The time of Momentary destruction (ti) is about 0.01-0.03 sec, and the slight deformation (σ) of the adhesive layer (σ) is 0.1-1.8 it estimated as electric capacity change.Quantitative relations are not found between σ and ti, adhesive strength (σ) and ti, σ and deformation velocity (σ/ti).The Ratio of deformation to adhesive lager (σ/σ×100 (%)) linearly increases with testing temperature.
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  • I.Chain Transfer in Cationic Polymerization
    Seizo Okamura, Toshinobu Higashimura
    1956 Volume 13 Issue 134 Pages 262-267
    Published: June 25, 1956
    Released on J-STAGE: October 14, 2010
    JOURNAL FREE ACCESS
    Styrene is polymerized by stannic chloride in ethylene dichloride and also in ethylene dichloride-benzene. Experimental results show that (1) the rates of polymerization are decreased extraordinarily in the initial stage, and also by the addition of trace water, (2) the reaction order of rates is the second to monomer concentration both in the initial concentration or in the proceeding of polymerization, (3) the degree of polymerization decreases as polymerization proceeds and this can be explained by the chain transfer of monomer, (4) the relationship between 1/P and 1/(initial concentration of monomer) is found to be linear and the chain transfer constant of benzene is calculated to be 0.40×710-2.
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  • XII. Ionic Polymerization of Phenyl Vinyl Ether Catalyzed by Boron Fluoride and Stannic Chloride
    Minoru Imoto, Jiro Takenaka
    1956 Volume 13 Issue 134 Pages 268-276
    Published: June 25, 1956
    Released on J-STAGE: October 14, 2010
    JOURNAL FREE ACCESS
    (1) At 40°C, cationic polymerization of phenyl vinyl ether catalyzed by BF3.(C2H5) 2O in benzene was carried out.The initial rate was found to be expressed by the equation: RO=k [M][C](2) The rate of polymerization of phenyl vinyl ether catalyzed by SnC14 in carbon tetrachloride was measured.The rate equation was expressed by the equation.RO=k [M][C] The activation energy was 5300 cal/mol.The polymer thus produced has about one free phenolic OH group per molecule.As by-product, a considerable amount of free phenol was isolated.
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