白色フィラー配合ゴムの性質と高性能化

5. 白色フィラーと環境劣化, 熱可塑性エラストマーへの配合効果と白色フィラーの今後

抄録

This paper referred to the effects of inorganic fillers on photo and heat aging of vulcanizates and the mechanical properties of thermoplastic elastomers. The photo aging resistance of vulcanizates filled with a plate-like filler such as kaolin clay was superior to that of vulcanizates filled with a granular-like filler such as silica and calcium carbonate. It was due to low permeability for both light and oxygen of vulcanizates filled with a plate-like filler. On the other hand, in the case of heat aging, vulcanizates filled with silica showed better resistance than those filled with carbon black in the presence of antioxidants. It seemed that an acidic filler such as silica activated antioxidants by acid-base interaction between a hydroxyl group on filler surface and an antioxidant. Some references of the effect of inorganic fillers on the physical properties of thermoplastic elastomers were reviewed. Several topics of inorganic fillers in the future were also referred.