Seikei-Kakou
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
Search
Advanced search
OR
Browse
Search
Volume 2, Issue 4
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Eliminating the Multi-Step Control Operation “Re-Measuring” Type Material Pressure-Holding Injection Molding System
    Shigeru Tsutsumi
    1990 Volume 2 Issue 4 Pages 331-335
    Published: August 20, 1990
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.2.331
    JOURNAL FREE ACCESS
    Download PDF (1075K)
  • Characterization of High-Order Structure and Impact Strength of Multi-Phase Polymer Alloys
    Ikuo NARISAWA, Syohi TOYODA, Takuro KITAMURA, Kazushige INOUE
    1990 Volume 2 Issue 4 Pages 350-359
    Published: August 20, 1990
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.2.350
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A quantitative characterization of the degree of agglomeration of the particles in multi-phase polymer alloy systems has been carried out. A numerical agglomeration distribution function and its 4 moments were calculated from SEM photographs using computer image analysis. In a model alloy system of PC/MBS a good correlation between the degree of agglomeration of the MBS and of the impact strength has been obtained. In PBT/PC alloys, the effect of mixing conditions in the heating rolls on the distribution of particle diameter, ligament thickness between particles and degree of agglomeration have been examined. A similar analysis has been carried out on on the PBT/PC alloys mixed with an extruder. The results showed that increasing agglomeration of the dispersed phase (PC) reduced the impact strength when the matrix was composed of high molecular weight PBT.
    View full abstract
    Download PDF (2569K)
  • Influence of Processing Conditions on Fracture Elongation in Extruded Polybutene-1 Pipe
    Koichi KITAO, Nozomu MISAKA
    1990 Volume 2 Issue 4 Pages 360-365
    Published: August 20, 1990
    Released on J-STAGE: November 18, 2009
    DOIhttps://doi.org/10.4325/seikeikakou.2.360
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The relationship between the melt flow behavior and mechanical properties in extruded polybutene-1 pipe was discussed with special emphasis on the molecular orientation caused by the extrusion process. It was demonstrated that the molecular orientation should be minimized in order to maintain product properties, such as fracture elongation. To minimize the molecular orientation the flow stress at the sizingsleeve inlet where the melt flow ends should be depressed. This flow stress characterises the draw ratio from which the extrusion rate was calculated.
    The results also showed that the relationship between the die diamater and the product diameter should be optimized to reduce the flow stress especially at high extrusion rate. These results were also confirmed through actual extrusion tests.
    In order to confirm the relationship between the molecular orientation and the product properties, extruded sheets having high orientation were also tested. The degree of molecular orientation was measured by Raman spectroscopy. The results confirmed that the elongation heavily depended on the molecular orientation.
    View full abstract
    Download PDF (1098K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top