Abstract
In the previous report, the allylphenol derivatives were found to be effective as reactive antioxidants for rubber because of their profound effects of prevention of oxidative degradation of vulcanizates and their acetone extracted samples.
In this report, it is shown that there are difference in the antioxidative effects between antioxidants which are effective in processing and previously polymerized ones. Under short time cure, it was found that polymerized antioxidants had better ability of antioxidation and anti-extraction with acetone than the others. On the other hand, under longer cure the latter had more powerfull antioxidative effect than the former. It was also shown that, in regard to the reactivities and antioxidative effects of various allylphenols on rubber, triallylphenol cerivatives were superior to di- or mono-allylphenol derivatives.
