特論講座
ゴムの状態変化
第2回 ゴムの状態と引張物性；状態と引張物性
キーワード:
Filled Rubber,
Stress at 100% Strain,
Crosslink Density,
Filler-volume Effect,
Power Law of Extension Ratio at Break
2016 年 89 巻 7 号 p. 209-215
詳細
2016 年 89 巻 7 号 p. 209-215
The relations between the tensile properties of filled rubbers and the states of filled rubber are discussed.
Crosslinking in terms of stress can be estimated most properly with the stress at 100% strain M100. The variation of M100 among the rubbers with the same formulation originates from those of crosslink density, due to variation of crosslinking in the bound rubber, and filler volume effect, due to variation of dispersion.
Unique relations exist between the extension ratio at break λb and M100; With amorphous polymers, λb = A M100–0.75. With crystalline polymers, λb = A’ M100–0.25.
