کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
216158 1426293 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature and pressure dependences of volumetric properties of two poly(propylene glycol) dimethyl ether lubricants
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Temperature and pressure dependences of volumetric properties of two poly(propylene glycol) dimethyl ether lubricants
چکیده انگلیسی

The densities at high pressures of two dimethoxy end-capped poly(propylene glycols), CH3–O–[CH2–CH(CH3)–O]m–CH3, with average molar masses higher than 1300 g · mol−1, were measured in the range (0.1 to 60) MPa at five different temperatures from (298.15 to 398.15) K. The measurements were performed in a high-pressure vibrating tube densimeter. A correction factor, due to the viscosity of the sample, was applied to the experimental density values. The pressure–volume–temperature behavior of these lubricants was evaluated accurately over wide temperature and pressure ranges and correlated successfully with the empirical Tammann–Tait equation. The experimental data and the correlations were used to study the behavior and the influence of temperature and pressure on the isothermal compressibility, the isobaric thermal expansivity, and the internal pressure, as well as the effect of the polyether molecular structure on these properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 42, Issue 1, January 2010, Pages 84–89
نویسندگان
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