In this paper,an ab initio,local density functional(LDF)method was used to explore the relationship between the molecular properties of additives and the lubric
<正>After optimization and operation for half a year,the 30 kt/a2,2,4-trimethyl-1,3-pentadiol mono-isobutyrate(hereinafter abbreviated as glycol ester-12)unit c
Two kinds of cycloalkoxy silane compounds were synthesized and used as the internal electron donors(IEDs) of supported Ziegler-Natta catalyst for ethylene polym