用^(31)P-NMR谱法分析硫化二硫代磷酸钼摩擦改进剂的组分

Study on the Components of Sulfurized Molybdenum Dithiophosphate Friction Modifier by the 31 P NMR Spectra

报道了关于３１ＰＮＭＲ谱法分析不同反应条件下所制得硫化二硫代磷酸钼（ＳＭｏＤＴＰ）摩擦改进剂的组分及其变化。结果表明，所合成８种ＳＭｏＤＴＰ产物均是由１２～１３个有机５价Ｍｏ—Ｓ、ＰＳ、ＰＯ化合物及有机３价Ｐ—Ｓ化合物组成的混合物，其中随着反应温度从３０℃升至１００℃，或者随着Ｐ／Ｍｏ摩尔比从２／１降至１．２／１，或者随着预通Ｈ２Ｓ时间从０增至４５ｍｉｎ，其ＳＭｏＤＴＰ产物中所含有机５价Ｍｏ—Ｓ化合物的含量（ｗ）分别从２８．９％、４２．４％和３７．２％增至５２．５％、５２．７％和４２．４％。

This paper reports that the components and their variation of sulfurized molybdenum dithiophosphate (S MoDTP) friction modifier prepared under different reaction condition are analysed by the 31 P NMR spectra.Results show that synthesized 8 kinds of S MoDTP products are a mixture of consisting of 12～13 kinds of organic five valence Mo—S,PS,PO compounds and organic three valence P—S compounds.Among them the contents of organic five valence Mo—S compounds contained within S MoDTP products respectively increase from 28.9%,42.4% and 37.2% to 52.5% ,52.7% and 42.4% with increasing of reaction temperature from 30℃ to 100℃,or with decreasing of P/Mo molar ratios from 2/1 to 1.2/1,or with increasing of time of passing through H 2S in advance from 0 to 45 min.