Journal of Materials Life Society
Online ISSN : 2185-7016
Print ISSN : 1346-0633
ISSN-L : 1346-0633
Volume 17 , Issue 2
Showing 1-6 articles out of 6 articles from the selected issue
  • Sanekazu IGARI, Kiyoshi TAKAHISA
    2005 Volume 17 Issue 2 Pages 35-42
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
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  • Sadao SAKAMOTO
    2005 Volume 17 Issue 2 Pages 43-49
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
  • Takeshi KOJIMA, Takeshi YANAGISAWA
    2005 Volume 17 Issue 2 Pages 50-54
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
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  • Takuya DOI, Sanekazu IGARI, Izumi TSUDA
    2005 Volume 17 Issue 2 Pages 55-59
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
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  • Naoshi KAWAMOTO, Takahiro HORIKOSHI, Kazukiyo NOMURA, Hideyuki YOKOTA, ...
    2005 Volume 17 Issue 2 Pages 61-66
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
    Polypropylene stabilization by the additives addition without pelletizing process makes it possible to save production energy effectively, because the pelletizing process consumes one-third of total production energy. An addition of stabilizer into polymerization system was studied as a novel method to stabilize polypropylene. Since the Ziegler-Natta catalyst is known to be deactivated by polar groups of stabilizer, aluminum phenoxide (Al-Ph) was prepared via the reaction of phenolic antioxidant, 3 (3, 5-di-t-butyl-4-hydroxylphenyl)-N-octadecylpropionamide (AO-1) with triethylaluminum in order to mask the polar groups such as OH group of AO-1. Propylene polymerization was carried out in the presence of the AO-1 or its Al-Ph. Although the AO-1 gave rise to decrease in catalyst yield and change in hydrogen response, the Al-Ph of AO-1 had no influence on the catalytic polymerization behavior and thus the obtained polymer characteristics such as molecular weight, polydispersity and meso pentad as a stereoregularity were comparable to that polymerized without the antioxidant and the aluminum aryloxide of AO-1. Polypro pylene obtained in the presence of the aluminum aryloxide was well stabilized for oxidation and its stability was over 1000h at 100°C.
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  • Zenjiro OSAWA, Yoshinori HONNDA, Tetsuya OSUMI, Hotoshi KUBOTA
    2005 Volume 17 Issue 2 Pages 67-71
    Published: April 30, 2005
    Released: April 19, 2011
    JOURNALS FREE ACCESS
    Microbial denitrification effect of wastewater using various polymeric materials was compared and the following results were obtained. Biodegradable polycaprolactone (PCL) was very effective for the denitrif ication, followed by cellulosic materials namely, kenaf, cotton cloth and cellophane. Biodegradable poly (lactic acid) (PLA) provided a little effect, and low density polyethylene (LDPE) and poly (vinyl alcohol) (PVA) scarcely showed dentrification effect. The results were coincided with the weight loss and surface change of the samples.
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