Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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Volume 8, Issue 5
Displaying 1-15 of 15 articles from this issue
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Index
Preface : Special Issue on Plastics Products for Infrastructure
Technical Note : Special Issue on Plastics Products for Infrastructure
Views of Processing Technique
Views of Processing Technique
Special Lecture
Original Papers
  • The Strength of the Weld Region of an Injection Molded Article of Modified Polypropylene and Polyamide Alloy
    Masafumi KINOSHITA, Toshio NIWA, Ou SHIBATA
    1996 Volume 8 Issue 5 Pages 325-330
    Published: May 20, 1996
    Released on J-STAGE: November 18, 2009
    DOIhttps://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.4325/seikeikakou.8.325
    JOURNAL FREE ACCESS
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    The strength and morphology of the weld region of injection molded test pieces of a polymer alloy of modified Polypropylene (m-PP) and Polyamide (PA) were studied.
    The effect of the composition and viscosity of m-PP, the condition of the reactive processing of PA and PP on the weld strength were examined.
    FT-IR analysis confirmed the reaction between Anhydride group of Maleic m-PP and Amino group of PA. That new formation of covalent bonds is assumed to make the alloy compatible.
    A microscopic observation of the weld region aswell as the strength of the weld test pieces, suggested the weld strength strongly depended on the morphology of the weld region. The small size (<2μm) and globe-shape (not a thin filmy layer) of dispersed domain are found essential to the higher weld strength.
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  • Characteristics of Filled Polyvinylchloride by Calciumcarbonate
    Effectiveness for Capturing Generated Hydrogenchloride from Polyvinylchloride
    Hideaki IMANISHI, Takayuki NAITO, Kazuo UMEHARA
    1996 Volume 8 Issue 5 Pages 331-336
    Published: May 20, 1996
    Released on J-STAGE: November 18, 2009
    DOIhttps://yz-jsjc-gov-cn-1416.res.gxlib.org.cn:443/rwt/1416/https/MSYXTLUQPJUB/10.4325/seikeikakou.8.331
    JOURNAL FREE ACCESS
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    Polyvinylchloride has excellent properties as a thermoplastic material. However, when it is molded by heated process, and particularly when it is incinerated, a large amount of hydrogenchloride is generated. For the purpose of capturing generated hydrogenchloride, calciumcarbonate was added to polyvinylchloride. As a result of this study, a fine powdery calcium carbonate had a high effectiveness for capturing generated hydrogenchloride from polyvinylchloride. It can be presumed that the high effectiveness depends on powder size or its surface area and not on its shape. Also, the viscosity, bending strength, modulus of elasticity, and Izod impact value were measured for these composite materials made from polyvinylchloride and calcium carbonate. These mechanical properties showed that these composite materials had durability for practical use.
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Reports from Universities and Institutions in Japan
Q&A in Polymer Processing - Advices for a Better Molding Technology -
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