pρT measurements of polyethylene glycol dimethylethers between 278.15 and 328.15 K at pressures to 12 MPa

被引：61

作者：

Comuñas, MJP

López, ER

Pires, P

García, J

Fernández, J ^{[1
]}

机构：

[1] Univ Santiago de Compostela, Fac Fis, Lab Propiedades Termofis, E-15706 Santiago De Compostela, Spain

[2] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, P-2825 Monte De Caparica, Portugal

[3] Univ Vigo, Fac Ciencias, Dept Fis Aplicada, E-36200 Vigo, Spain

来源：

INTERNATIONAL JOURNAL OF THERMOPHYSICS | 2000年 / 21卷 / 04期

关键词：

density; high pressure; internal pressure; isobaric thermal expansion coefficients; isothermal compressibilities; liquid; polyethylene glycol dimethylethers;

D O I：

10.1023/A:1006606122944

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Tn this paper we present a new experimental apparatus designed to measure pressure-density-temperature (ppT) properties with a high-pressure vibrating tube densimeter. Data reliability has been verified by comparing our experimental results for methanol, n-heptane, toluene, and HFC-134a with literature data. In this work we also report new experimental densities from 278.15 to 328.15 K, and up to 12 MPa, of triethylene glycol dimethylether (TrEGDME) and tetraethylene glycol dimethylether (TEGDME). The isobaric thermal expansion coefficients, isothermal compressibility, and internal pressure have been calculated. The dependence of these properties on the length of polyethylene glycol dimethyl ether, CH3O-((CH2)(2) O)(n)-CH3, is analyzed.

引用

页码：831 / 851

页数：21

共 47 条

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[42] MEASUREMENTS OF LIQUID, NEAR-CRITICAL, AND SUPERCRITICAL (P,RHO,T) OF 1,1,1,2-TETRAFLUOROETHANE (R-134A) AND OF 1,1-DIFLUOROETHANE (R-152A) [J].