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Study of the structure–activity relationship of metallocene-catalysed poly-α-olefin (mPAO) base oil
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-06-16 , DOI: 10.1039/d1me00032b Jia Y. Xue 1 , Su Q. Dong 2 , Pu K. Mi 3 , Li B. Wang 4 , Si H. Wang 4 , Zhang Zhang 5 , Zhi G. Zhang 5 , Jia S. Hu 6
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-06-16 , DOI: 10.1039/d1me00032b Jia Y. Xue 1 , Su Q. Dong 2 , Pu K. Mi 3 , Li B. Wang 4 , Si H. Wang 4 , Zhang Zhang 5 , Zhi G. Zhang 5 , Jia S. Hu 6
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In this paper, α-olefins with different chain lengths are used as monomers, and metallocene catalysts were used to prepare low-viscosity metallocene-catalysed poly-α-olefin (mPAO) lubricating base oils. Structure and performance tests were carried out. Three molecular structure parameters were selected: relative molecular weight (Mn), branch carbon number (L), and number of branches (n). By mixing and compounding each component oligomer and performing data analysis, the relationships between the molecular structure of mPAO and the key physical properties of the base oil, such as viscosity, viscosity index and pour point (PP), were studied. The results show that in a certain range of Mn, when L (or n) is constant, with an increase in Mn, the viscosity (Kv) and Mn show a power function growth trend, and the growth rate of Kv40°C is greater than that of Kv100°C. The viscosity index (VI) increases with increasing Mn, a greater n results in a more obvious growth trend, and a greater L results in a weaker growth trend. When L is constant, an increase in n results in an initial decrease followed by an increase in PP, and PP is the lowest at n = 2.
中文翻译：
茂金属催化聚α-烯烃（mPAO）基础油的构效关系研究
本文以不同链长的α-烯烃为单体，采用茂金属催化剂制备低粘度茂金属催化聚α-烯烃（mPAO）润滑基础油。进行了结构和性能测试。选择了三个分子结构参数：相对分子量 ( M n )、支链碳数 ( L ) 和支链数( n )。通过对各组分低聚物进行混合配混并进行数据分析，研究了mPAO的分子结构与基础油的粘度、粘度指数和倾点（PP）等关键物理性质之间的关系。结果表明，在一定的M n范围内，当L（或Ñ）是恒定的，与增加中号Ñ，粘度（KV）和中号Ñ显示的幂函数的增长趋势，和KV的生长速率40℃比的Kv的更大的100℃。粘度指数（VI）与增加而增加中号Ñ，更大Ñ在一个比较明显的增长趋势的结果，和更大的大号较弱增长趋势的结果。当L恒定时，n的增加导致初始减少，然后 PP 增加，并且 PP 在n = 2 时最低。
更新日期：2021-07-07
中文翻译：
茂金属催化聚α-烯烃（mPAO）基础油的构效关系研究
本文以不同链长的α-烯烃为单体，采用茂金属催化剂制备低粘度茂金属催化聚α-烯烃（mPAO）润滑基础油。进行了结构和性能测试。选择了三个分子结构参数：相对分子量 ( M n )、支链碳数 ( L ) 和支链数( n )。通过对各组分低聚物进行混合配混并进行数据分析，研究了mPAO的分子结构与基础油的粘度、粘度指数和倾点（PP）等关键物理性质之间的关系。结果表明，在一定的M n范围内，当L（或Ñ）是恒定的，与增加中号Ñ，粘度（KV）和中号Ñ显示的幂函数的增长趋势，和KV的生长速率40℃比的Kv的更大的100℃。粘度指数（VI）与增加而增加中号Ñ，更大Ñ在一个比较明显的增长趋势的结果，和更大的大号较弱增长趋势的结果。当L恒定时，n的增加导致初始减少，然后 PP 增加，并且 PP 在n = 2 时最低。
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