顺式结构对窄分布稀土顺丁橡胶性能的影响  

Effect of cis-1,4-unit on properties of rare earth-based polybutadiene rubber with narrow distribution

作　　者：宋玉萍[1,2] 何文衡 薛文慧 梁胜凯 唐天明 SONG Yu-ping;HE Wen-heng;XUE Wen-hui;LIANG Sheng-kai;TANG Tian-ming(Research Institute of Dushanzi Petrochemical Company,PetroChina,Karamay 833699,China;Xinjiang Rubber Plastic Materials Laboratory,Karamay 833699,China;Rubber Department of Dushanzi Petrochemical Company,PetroChina,Karamay 833699,China)

机构地区：[1]中国石油独山子石化公司研究院,新疆克拉玛依833699 [2]新疆橡塑材料实验室,新疆克拉玛依833699 [3]中国石油独山子石化公司橡胶部,新疆克拉玛依833699

出　　处：《合成橡胶工业》2023年第1期6-9,共4页China Synthetic Rubber Industry

摘　　要：对自制的三个窄分布稀土顺丁橡胶试样进行了结构剖析,研究了其顺式-1,4-结构含量与性能的关系。结果表明,三个试样均为窄分布的顺丁橡胶(分子量分布指数在2.55~2.74),生胶门尼黏度在45±5,其中顺式-1,4-结构含量较高者略大;均具有较好的焦烧安全性且硫化速率相当,与炭黑结合得较好;均具有较好的物理机械性能、耐热老化性能、耐磨性和回弹性。随着顺式-1,4-结构含量的增加,试样的压缩生热和滚动阻力降低,耐动态疲劳性能略有下降。The structures of three self-made rare earth-based cis-1,4-polybutadiene rubber with narrow distribution were analyzed,and the relationships between cis-1,4-unit content and properties were studied.The results showed that the three samples had all narrow distribution(molecular weight distribution index ranged from 2.55 to 2.74),and the Mooney viscosity of raw rubber was in the range of 45±5,among which the higher cis-1,4-unit content was slightly higher.All of them had good scorching safety,similar curing rate and good combination with carbon black;good physical and mechanical properties,heat aging resistance,wear resistance and resilience.With increase of cis-1,4-unit content,the compression heat generation and rolling resistance of the polybutadiene rubber decreased,and the dyna-mic fatigue resistance decreased slightly.

关 键 词：稀土顺丁橡胶 顺式结构 窄分布 微观结构 加工性能 物理机械性能 动态力学性能 

分 类 号：TQ333.2[化学工程—橡胶工业]