Migration behaviors of antiozonants in binary rubber-based vulcanizates of NR, SBR, and BR

✍ Scribed by Sung-Seen Choi

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 155 KB
• Volume: 74
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19991220)74:13<3130::aid-app15>3.0.co;2-a

✦ Synopsis

Influence of rubber composition on migration of N-phenyl-NЈ-isopropyl-pphenylenediamine (IPPD), and N-phenyl-NЈ-(1,3-dimethylbutyl)-p-phenylenediamine (HPPD) to the surface in binary rubber-based vulcanizates of natural rubber (NR), styrene-butadiene rubber (SBR), and butadiene rubber (BR) was studied. Migration experiments were performed at 60 and 80°C for 21 days and outdoors for 4 months. Migration rates of IPPD and HPPD in the vulcanizates of SBR/NR and BR/NR blends outdoors increased by decreasing the content of NR, and those in the vulcanizates of BR/SBR blends decreased with an increase of the content of BR. Migration behaviors of the antiozonants in the vulcanizates of SBR/NR and BR/NR blends at 60 and 80°C, on the whole, showed trends similar to the outdoor results. Migration rates of the antiozonants in the vulcanizates of BR/SBR blends at 60 and 80°C showed some differences. Variation of migration behaviors of the antiozonants in the binary rubber-based vulcanizates depending on rubber composition was explained by the interface between dissimilar rubbers and the intermolecular interactions between the matrices and the antiozonants.