久久国产精品午夜一区_91精品國產高清久久久久久91_?级毛片免费全部播放_欧美色图在线视频一区二区三区_国产综合亚洲一区二区三区_中文字幕熟女网_国产精品男人爽免费视频_九九无码网战_亚洲日本三级电影在线观看_欧美日韩DVD手机在线不卡

The thermophysical properties of 1-hexyl-3-methyl imidazolium based hydrophobic room temperature ionic liquids （RTILs）; with tetrafluoroborate （BF4）, hexafluorophosphate （PF6）, and bis（trifluoromethylsulfonyl） imide （Tf2N） anions, namely density q （298.15 to 348.15） K, dynamic viscosity g （288.2 to 348.2） K, surface tension r （298.15 to 338） K, and refractive index nD （302.95 to 332.95） K have been measured. The coefficients of thermal expansion ap values were calculated from the experimental density data using an empirical correlation. The thermal stability of all ILs is also investigated at two different heating rates （10 and 20） C min1） using thermogravimetric analyzer （TGA）. The experimental results presented in this study reveal that the choice of anion type shows the most significant effect on the properties of ILs. Thechloride and water contents of ILs （as impurities） are also investigated and reported in the present work.