ゴムの状態変化

第4回　自動車タイヤ用ゴム部材の老化：1．乗用車用タイヤ

抄録

The log λ_b vs. log M₁₀₀ mapping, using the relation λ_b ∝ M₁₀₀^-0.75 as a reference, which held for the change caused by crosslinking, has been found effective to classify the tensile property changes due to aging under various laboratory conditions. The method was now applied for the rubber parts of PCR tires used in the field. Four types of change patterns, as found in the laboratory, were also found in tire aging. Although the aging conditions in tire agreed with those of laboratory in some cases, other cases also appeared to exist. The reasons were discussed by means of special condition added to the tire parts during field use.