高模量天然橡胶/顺丁橡胶/反式丁戊橡胶并用胶的配方设计与性能

Formulation design and properties of high modulus natural rubber/cis-1,4-polybutadiene rubber/trans-1,4-poly(butadiene-co-isoprene)rubber blends

研究了反式丁戊橡胶(TBIR)和低门尼黏度反式丁戊橡胶(LTBIR)改性炭黑增强高模量天然橡胶(NR)/顺丁橡胶(BR)并用胶的结构与性能。结果表明,采用TBIR和LTBIR都可以明显改善NR与BR的相容性;相比NR/BR并用胶,同时采用TBIR和LTBIR改性并减少4份(质量)炭黑使用量的高模量NR/BR并用胶的力学性能和回弹性能得到改善,磨耗体积降低13%,压缩生热降低10%,滚动阻力降低20%,1级屈挠疲劳寿命提高约1.6倍,6级屈挠疲劳寿命提高约1.1倍。

The structure and properties of high modulus natural rubber(NR)/cis-1,4-polybutadiene rubber(BR)blends reinforced with carbon black and modified with trans-1,4-poly(butadiene-co-isoprene)rubber(TBIR)and low Mooney viscosity trans-1,4-poly(butadiene-co-isoprene)rubber(LTBIR)were investigated.The results showed that both of the TBIR and LTBIR could significantly improve the compatibility between NR and BR.Compared with NR/BR vulcanizates,the mechanical properties and resilience of high modulus NR/BR vulcanizates modified with TBIR and LTBIR with reducing 4 phr(mass)carbon black were improved,wear volume reduced by 13%,compression heat generation reduced by 10%,rolling resistance reduced by 20%,first-grade flex fatigue life improved by about 1.6 times,and sixth-grade flex fatigue life improved by about 1.1 times.