大変形における加硫ゴムの化学レオロジー

概要

論文の詳細を見る
In this investigation, repeated chemical stress relaxation measurements were carried out to observe the relaxation behavior of vulcanized rubbers at large deformation. Previously, we had proposed the following Arrhenius-type equation for high extension ratio (α), f/f(0)=A exp(-te^E_f/α), and derived a universal equation involving the extension ratio and the temperature from a usual Arrhenius equation. Based on the previous data as well as the present data, the relationships among the oxidative, thermal and mechanical degradations were discussed. When log(f/f(0)) is plotted against 1/α, the data fall on a curve divisible into two straight lines ; one is parallel to the 1/α axis in the small deformation rage and the other dependent on in the large deformation range. The value of α at the cross-point of these two straight lines is called α_c, which is clearly the critical extension ratio between the linear and nonlinear regions at the experimental temperatures. If α_c is extrapolated to infinity, or 1/α_c→0, T=341゜K (68℃) can be obtained. This shows that the relaxation behavior below this critical temperature 68℃ is linear irrespective of extension ratio α. As it has been known already that the oxidative reaction of natural rubber vulcanizates occurs above 70℃ can be attributed to the mechanochemical mechanism. These facts suggest that the stress relaxation in large deformation progresses by the combined effect of mechanical and chemical degradations.
社団法人日本材料学会の論文
1973-05-15

大変形における加硫ゴムの化学レオロジー

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

大変形における加硫ゴムの化学 レオロジー

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

大変形における加硫ゴムの化学レオロジー