日本ゴム協会誌
Print ISSN : 0029-022X
87 巻, 11 号
選択された号の論文の5件中1~5を表示しています
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特論講座
  • 第4講 熱処理や延伸による,架橋ゴム中のカーボンブラックネットワークの構造変化
    加藤 淳, 池田 裕子, 五十野 善信
    2014 年87 巻11 号 p. 447-453
    発行日: 2014年
    公開日: 2015/05/22
    ジャーナル フリー
    An advantage of three-dimensional transmission electron microscopy is reviewed using our studies on effects of heat treatment and stretching on a variation of filler network of carbon black (CB) in rubber vulcanizates. Volume resistivity is discussed with characteristics of the CB network structure, and the CB network is suggested to be more stable in 80 parts per one hundred rubber by weight (phr) CB-filled natural rubber vulcanizate than in 50 phr CB-filled one. The stretching for 40 phr CB-filled styrene butadiene rubber vulcanizate cured under an elongation ratio by a two-step process shows aggregations of CB under low strains and collapses of CB network under high strains.
  • (その2)ゴム弾性論が裏づけるゴムの疲労破壊の本質
    深堀 美英
    2014 年87 巻11 号 p. 454-459
    発行日: 2014年
    公開日: 2015/05/22
    ジャーナル フリー
    S-N curve, the most effective and essential data to estimate a fatigue life of rubber is revealed with the rubber elasticity theory using material's characteristic constants, such as modulus, strain energy release rate, intrinsic flaws and the crack growth intensity coefficient. Mechanical properties of rubber are thus occupied strongly by rubber elasticity as well as viscosity over considerably high strain fields.
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