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| 过氧化物硫化体系对不同构型聚丁二烯橡胶性能的影响 |
| Influence of Peroxide Vulcanization System on Properties of Polybutadiene Rubber with Structurally Different Configurations |
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| DOI： |
| 中文关键词: 高顺式1，4-聚丁二烯橡胶；高乙烯基聚丁二烯橡胶；过氧化物硫化体系；硫化剂DCP |
| 英文关键词: high cis-1，4-polybutadiene rubber；high vinyl polybutadiene rubber；peroxide vulcanization system；vulcanizing agent DCP |
| 基金项目: |
| 中图分类号:TQ330.38＋5；TQ333.2 |
| Author Name | Affiliation | | LI Xiaoliang | Key Laboratory of Rubber and Plastic Materials and Engineering of Ministry of Education，Qingdao University of Science and Technology | | SHAO Youguo | Key Laboratory of Rubber and Plastic Materials and Engineering of Ministry of Education，Qingdao University of Science and Technology | | XIAO Yongming | Key Laboratory of Rubber and Plastic Materials and Engineering of Ministry of Education，Qingdao University of Science and Technology | | HUA Jing | Key Laboratory of Rubber and Plastic Materials and Engineering of Ministry of Education，Qingdao University of Science and Technology | | CHEN Xuegang | Key Laboratory of Rubber and Plastic Materials and Engineering of Ministry of Education，Qingdao University of Science and Technology |
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| 中文摘要: |
| 研究过氧化物硫化体系（硫化剂DCP/助交联剂TAC）对两种构型的聚丁二烯橡胶（BR）[高顺式1，4-聚丁二烯橡胶（BR9000）和高乙烯基聚丁二烯橡胶（HVBR）]性能的影响。结果表明：BR9000和HVBR胶料的硫化速度均随硫化温度升高或硫化剂DCP用量增大而加快；交联密度受硫化温度影响较小，与硫化剂DCP用量成正比；与BR9000分子中主链碳-碳双键及烯丙基位氢（α-H）相比，HVBR中位阻更小的侧基碳-碳双键及属于叔碳原子氢的α-H反应活性更高，硫化剂DCP分解产生的自由基易与之结合形成活性交联点，实现有效交联，HVBR胶料的硫化速度较BR9000胶料更快，交 联密度和拉伸强度更高。 |
| 英文摘要: |
| The effects of peroxide vulcanization system（vulcanizing agent DCP/auxiliary crosslinking agent TAC） on the properties of two polybutadiene rubber（BR） materials which had structurally different configurations，high cis-1，4-polybutadiene rubber（BR9000） and high vinyl polybutadiene rubber（HVBR）， were investigated. The results showed that the curing rate of BR9000 and HVBR compounds increased with the increase of vulcanization temperature or the amount of curing agent DCP. The crosslinking density was less affected by vulcanization temperature，but it was proportional to the amount of curing agent DCP. Compared with the main chain carbon-carbon double bond in BR9000，the side chain carbon-carbon double bond in HVBR had less steric hindrance and higher reactivity. Compared with the allylic hydrogen（α-H） in BR9000，the hydrogen atom attaching to the tertiary carbon atom in HVBR possessed higher reactivity， with which the free radicals produced by decomposition of curing agent DCP could easily react to form active crosslinking sites and then establish an effective crosslinking network. As a result，the vulcanization rate of HVBR compound was faster than that of BR9000 compound，and the crosslinking density and tensile strength were higher. |
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