成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
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19 巻, 6 号
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解説 : 特集　『かたち』が生み出す機能と特性
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日本の大学・試験・研究機関の研究 : 153
海外研究機関の紹介 : 79
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論文
  • フィラー/PP複合材料の熱劣化機構とその抑制
    細井 啓史, 船見 文寧, 安田 直樹, 野村 学, 由井 浩, 幾田 信生
    2007 年 19 巻 6 号 p. 375-380
    発行日: 2007/06/20
    公開日: 2009/01/09
    DOIhttps://doi.org/10.4325/seikeikakou.19.375
    ジャーナル フリー
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    To examine thermal degradation accelerated by filling inorganic particles in polypropylene (PP), the composites were made with three types of inorganic powders : talc, magnesium hydroxide, and mica. They were easily degraded with the fillers in this order in the thermal aging test. A commercial heat resistance agent, ‘Plenlizer MK-400’, was added while making the composites. The degradation resistance of the agent remarkably appeared in the reverse order. That is, thermal degradation was most depressed in talc-filled composite with the agent. In another experience, soxhlet extraction was carried out to the filler with an organic solvent, o-xylene, that was able to dissolve PP. A lot of inorganic ions were detected in the extractant. In particular, the detected amount of aluminum ion increased in the order of talc, magnesium hydroxide, and mica. This order was the same as the fillers indicated by the degree of degradation. Infrared analysis of the agent with inorganic ions in chloroform showed that the peaks due to the agent were much stronger with aluminum ion than those with iron ion. These results suggested that a cause of degradation was aluminum ion dispersed from particles to PP matrix during the molding.
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