摩擦改进剂烷基链特性对减摩性能的影响

Effect of Alkyl Chain Characteristic of Friction Modifier on Friction-Reducing

通过对摩擦改进剂作用机理分析,提出利用描述分子内旋转难易程度的分子柔顺性来定量反映摩擦改进剂烷基链结构对减摩性能的影响。采用HFRR测定含不同碳链结构脂肪酸摩擦改进剂油品的摩擦系数,利用Kier柔顺性计算方法计算不同烷基链脂肪酸摩擦改进剂的分子柔顺性,将二者进行关联。结果表明,油品摩擦系数与摩擦改进剂分子柔顺性有较好的关联性,摩擦改进剂分子柔顺性可作为定量反映其烷基链对减摩性能影响的特性参数。

Based on the analysis of the action mechanism of friction modifiers flexibility, which describes the ability of inner rotation in molecule, is used to influence resulting from the alkyl chain structures of friction modifier on the friction quantitatively. The friction coefficient of the oil containing fatty acid friction modifi , the molecular account for the -reducing ability er with different alkyl chains was tested by high-frequency reciprocating rig （HFRR）. The molecular flexibility of the fatty acid friction modifier with different alkyl chains was calculated with Kier flexibility calculation method. It is shown that the ability of frictio molecular flexibility. The molecular flexibility can be quantitatively account for the influence of alkyl chain of reducing. n-reducing could be interpreted rightly by used as the characteristic parameter to friction modifier on the ability of friction-