"Effects of different vulcanization systems on properties of bio-based poly（di-n-butyl itaconate-co-butadiene) rubber"

Abstract

The effects of conventional vulcanization （CV) system, semi-effective vulcanization （SEV) system, effective vulcanization （EV) system, peroxide 1,3-bis（tert-butylperoxyisopropyl) benzene （BIBP)/triallyl isocyanurate （TAIC) vulcanization system, and phenolic resin SP 1045 vulcanization system on properties of poly（di-n-butyl itaconate-co-butadiene) rubber were studied. The results showed that the vulcanization rate of BIBP/TAIC vulcanization system was the fastest, while the vulcanization rate of SP 1045 vulcanization system was the slowest, and the vulcanization rate of CV system, SEV system, and EV system increased gradually in sequence. The crosslinking densities of the vulcanizates of the sulfur vulcanization systems in descending order were CV system, SEV system and EV system. Tensile strength of all the vulcanizates in descending order were SEV system, SP 1045 vulcanization system, CV system, EV system and BIBP/TAIC vulcanization system, in which elongation at break and tear strength of the vulcanizate of EV system were the largest, and the wear resistance of the vulcanizate of CV system was the best. The vulcanizate of BIBP/TAIC vulcanization system had the best thermal-oxydative aging property. Compared with the sulfur vulcanization systems, the glass transition temperatures of the vulcanizates of BIBP/TAIC and SP 1045 vulcanization systems shifted significantly towards to the high-temperature direction. The loss factor at 60 ℃ and rolling resistance of the vulcanizate of CV system were both the smallest. The effective damping temperature range of the vulcanizate of EV system was the widest.

Keywords

• poly（di-n-butyl itaconate-co-buta-diene) rubber， vulcanization system， curing characte-ristics， physical and mechanical property， thermal-oxydative aging property， dynamic mechanical pro-perty，