Abstract
The elongation change at break of polyepichlorohydrin vulcanizate after the thermal aging (120°C, 4days) has been discussed in regard to the vulcanization velocity of the three vulcanizing agent systems.
The vulcanizate from 2-butylamino-4, 6-dimercapto-s-triazme · MgO has been found to show the lowest elongation change at break (-0.4%) comparing with other vulcanizates from hexamethylenediamine carbamate·Pb3O4 and 2-mercaptoimidazoline·Pb3O4, in the presence of antioxidant nickel dibutyldithiocarbamate.
2-mercaptobenzimidazole which is an active antioxidant to polyepichlorohydrin vulcanizate owing to the weak vulcanizing action has been found not to be preferable to the vulcanizate with the titled property.
