成形加工
Online ISSN : 1883-7417
Print ISSN : 0915-4027
ISSN-L : 0915-4027
35 巻, 9 号
選択された号の論文の12件中1~12を表示しています
目次
巻頭言
解説 : 特集 金属樹脂接合
技術報告
プリンキピア ―常識を変えたモノたちの物語―
会議・見本市だより
論文
  • Khunanya Janchai, 井上 貴博, 岩崎 祥平, 木田 拓充, 山口 政之
    2023 年 35 巻 9 号 p. 318-323
    発行日: 2023/08/20
    公開日: 2023/09/20
    ジャーナル フリー

    We investigated the effect of shear history on the crystallization behavior of isotactic polypropylene (PP) containing a fibrous nucleating agent, i.e., 1, 3 : 2, 4-bis-o-(4-methylbenzylidene)-Dsorbitol (MDBS), using a polarized optical microscope attached with a parallel-plate shear device. The addition of MDBS greatly enhanced the crystallization temperature of PP with an accelerated crystallization rate. Although shear history applied during cooling barely affected the crystallization temperature for the sample containing MDBS, it greatly enhanced the PP orientation, even with a low shear rate. This was attributed to the formation of a pseudo shish-kebab structure, in which MDBS acted as the shish. It was also found that the addition of MDBS reduced the amount of β -form crystals, while PP without MDBS exhibited β -form crystals after applying an appropriate shear history.

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