High-Pressure Viscosity Measurements of Polyalphaorefins at Elevated Temperature
High-Pressure Viscosity Measurements of Polyalphaorefins at Elevated Temperature
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高温下聚α-烯烃的高压粘度测量
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
M. Matsui
中科院分区：
文献类型：
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作者：
Yuichi Nakamura;Shota Hiraiwa;Fumiaki Suzuki;M. Matsui
为了给弹流润滑条件下的摩擦学分析提供聚α-烯烃(PAO)S粘度的详细数据，利用一种特殊的紧凑型压力发生装置--金刚石顶压室，研究了宽粘度等级PAO(从PAO_2到PAO_(100))的粘度-压力-温度相关关系。在150℃以下，压力-粘滞系数随压力和温度的升高而逐渐减小，最高可达1 Gpa，150℃时的压粘系数约为40℃时的一半。用高压粘度数据对两个具有代表性的温度-压力-粘度关联式进行了很好的回归。用回归公式代替Blok的压力-粘度系数，得到了随粘度等级递增的系数，高粘度PAO100的压力-粘度系数约为低粘度PAO2的1.5倍。
In order to provide detail data on polyalphaorefin(PAO)’s viscosity for the tribological analysis under EHL lubrication conditions, viscosity-pressure-temperature correlation relation of wide range viscosity grade PAOs (from PAO2 to PAO100) was investigated employing a special compact pressure-generating apparatus called diamond-anvil cell. Pressure-viscosity coefficients were resulted to gradually decrease with increasing pressure and temperature up to 1 GPa at up to 150°C, and the values at 150°C were about a half of those at 40°C for all PAOs. The two representative temperature-pressure-viscosity correlation formulations were well regressed with the high-pressure viscosity data. By substituting the regression formulations for Blok’s pressure-viscosity coefficient, gradually increasing coefficient with viscosity grade were found out, and that of high viscosity PAO100 was about 1.5 times larger than that of low viscosity PAO2.