超音波探査法を用いた炭酸カルシウム配合ポリプロピレン/エチレン酢酸ビニル共重合体の特性評価 Acoustic Microscopy Evaluation of Polypropylene/Ethylene Vinyl Acetate Filled with Calcium Carbonate

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The agglomerate of particles and voids at the polymer-particle interface and the heterogeneous structure, have been characterized by scanning acoustic microscopy for polypropylene (PP)/ethylene vinyl acetate polymer blends (EVA) filled with modified calcium carbonate (CaCO<sub>3</sub>). The relationships between the hoterogeneous structure and mechanical properties (tensile strength, elongation at break, impact strength) of the PP/EVA/CaCO<sub>3</sub> series were investigated.<br>Using ultrasonic images, the haterogeneous structure in the PP/EVA/CaCO<sub>3</sub> series was evaluated based on the binarization method. Polymer blends were prepared by mixing PP and EVA using a two-roll mill, then the PP/EVA mixture and various size CaCO<sub>3</sub> particulates were mixed on the same mill. Stearic acid was used as a modifier for CaCO<sub>3</sub>.<br>By adding 2wt% EVA to PP, the heterogeneous structure decreased to about one-seventh the value of the PP/CaCO<sub>3</sub> blend. Furthermore, the heterogeneous structure in the modified CaCO<sub>3</sub> series was about one-thirtieth that of the unmodified blends. The tensile elongation at break depends on the heterogeneous structure, irrespective of CaCO<sub>3</sub> size and EVA content. However, it is recognized that impact strength depends on the heterogeneous structure and particle size. The impact strength of PP/EVA filled with small CaCO<sub>3</sub> particulates was greater than that with larger CaCO<sub>3</sub> particulates for the same heterogeneous structure.

収録刊行物

  • 成形加工

    成形加工 9(6), 434-441, 1997-06-20

    The Japan Society of Polymer Processing

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各種コード

  • NII論文ID(NAID)
    10002129260
  • NII書誌ID(NCID)
    AN10278882
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09154027
  • NDL 記事登録ID
    4249302
  • NDL 雑誌分類
    ZP17(科学技術--化学・化学工業--高分子化学・高分子化学工業--ゴム・プラスチックス)
  • NDL 請求記号
    Z17-1254
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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