期刊
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
卷 41, 期 4, 页码 789-794出版社
HIGHER EDUCATION PRESS
DOI: 10.7503/cjcu20190540
关键词
Natural rubber; Butadiene rubber; trans-1,4-Butadiene-isoprene copolymer rubber; Thermal-oxidative aging; Sidewall
资金
- National Basic Research Program of China [2015CB654700, 2015CB654706]
- Major Program of Shandong Province Natural Science Foundation, China [ZR2017ZA0304]
- Taishan Scholar Program of Shandong Province, China
The thermal-oxidative aging performance of a new generation synthetic rubber trans-1,4-butadieneisoprene copolymer rubber(TBIR) in NR/BR vulcanizates was studied. Compared with the NR/BR vulcanizates, the crosslinking density of NR/BR/TBIR vulcanizates with 10 to 20 per hundreds of rubber(phr) TBIR improved significantly as while as the tensile properties changed little. The heat build-up reduced by 2. 2-3. 4 degrees C and the flexural fatigue resistance increased about 100%. The filler dispersion improved and the average aggregate size of the filler reduced. With the increasing of thermal-oxidative aging time, the crosslinking density of vulcanizates increased and then decreased. The crosslinking density of NR/BR/TBIR vulcanizates remained unchanged after 48 h. With the increasing of aging time, the heat build-up first decreased and then increased and NR/BR/TBIR vulcanizates has the lowest heat build-up value. The flexural fatigue lifetime of NR/BR/TBIR was better than NR/BR vulcanizates.
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