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首页> 外文期刊>トライボロジスト >潤滑領域の遷移に伴うポリアルキルメタクリレート添加油のトラクション挙動
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潤滑領域の遷移に伴うポリアルキルメタクリレート添加油のトラクション挙動

机译：含聚甲基丙烯酸烷基酯油的润滑行为随润滑区的转变

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Traction behaviour of some different polyalkylmethacrylates (PAMA) solutions in polyalphaolefin was studied with a disk on roller type EHL tester. Experiments were conducted under the slide/roll ratio of 50%, a mean rolling speed between 0.004 and lm/s, and a temperature of 40C. When the coefficients of traction μ were plotted against the rolling speed U, the measurements of all the polymer solutions fell on the line for the base oil under the rolling speed above 0.2m/s. Under the rolling speed below 0.2m/s, the traction behaviour depended on the type of polymer. That is, as the rolling speed was further decreased, μ for high molecular weight polymer more gradually increased than that for the base oil, while μ for the low molecular weight polymers first deviated downwards from the base oil line, and then it increased again. Such traction behaviour can be explained in the variation in the traction with film parameter Λ. That is, low traction of polymer solutions compared to that of the base oil line was due to the increase in the film parameter. This tendency was the most significant for high molecular weight PAMA solution. On the other hand, μ for polymer solutions was also influenced by the mutual interaction k_M of polymer molecules in the partial EHL region including thin film lubrication. This effect was significant for low molecular weight PAMA with short alkyl chain showing high intensity of k_M.%自動車用エンジン油などの潤滑油には，粘度一rn温度特性を向上させるために，一般に粘度指数向rn上剤としての分子量数万～数十万程度のポリマーrnが添加されている．
机译：用滚筒式EHL测试仪研究了一些不同的聚甲基丙烯酸烷基酯（PAMA）在聚α-烯烃中的牵引行为。实验是在滑动/滚动比为50％，平均滚动速度为0.004至1m / s，温度为40℃的条件下进行的。当将牵引系数μ相对于轧制速度U作图时，在高于0.2m / s的轧制速度下，所有聚合物溶液的测量值都落在了基础油在线上。在低于0.2m / s的轧制速度下，牵引性能取决于聚合物的类型。即，随着轧制速度的进一步降低，高分子量聚合物的μ比基础油的μ逐渐增加，而低分子量聚合物的μ首先从基础油线向下偏离，然后再次增加。这种牵引行为可以用薄膜参数Λ的牵引变化来解释。即，与基础油管线相比，聚合物溶液的牵引力较低是由于膜参数的增加。对于高分子量PAMA溶液，这种趋势最为明显。另一方面，聚合物溶液的μ也受包括薄膜润滑在内的部分EHL区域中聚合物分子的相互作用k_M的影响。此效果对于烷基链短的低分子量PAMA表现出高的k_M强度非常重要。％の分子量数万〜数十万程度のポリマーrnが添加されている。

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