Estimation of the critical constants of long-chain normal alkanes / Nikitin ED,Pavlov PA,Skripov PV // INTERNATIONAL JOURNAL OF THERMOPHYSICS. - 1996. - V. 17, l. 2. - P. 455-469.

ISSN/EISSN:

0195-928X / нет данных

Type:

Article

Abstract:

Correlations between the critical constants of normal alkanes and the number of carbon atoms in a molecule have been considered. In an approximation of a self-consistent field for a polymeric fluid, an equation of state of the van der Waals type has been written, and the dependences of the critical constants of chain molecules on the number of mers have been obtained. It has been found that for an infinitely long alkyl chain, the limiting values of the critical temperature, the critical pressure, and the critical density are equal to, respectively, 1135 K, 0 MPa, and 0 kg . m(-3). A method of pulse heating of a wire probe immersed in the substance under investigation has been used to measure the dependence of the temperature of the attainable superheat T{*} of low-density polyethylene on the pressure p and the duration of heating pulse t{*}. Extrapolation has been used to obtain an estimation of the attainable-superheat temperature of polyethylene T{*}(p = 0, t{*} = 0) = 1175 K, which can be treated as the `'critical'' temperature of polyethylene.

Author keywords:

alkanes; chain molecules; critical parameters CRITICAL-TEMPERATURES; N-ALKANES; MOLECULES; CARBONS; NUMBER

DOI:

10.1007/BF01443403

Web of Science ID:

ISI:A1996TU60200011

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	PLENUM PUBL CORP
Address	233 SPRING ST, NEW YORK, NY 10013
Language	English
Keywords-Plus	CRITICAL-TEMPERATURES; N-ALKANES; MOLECULES; CARBONS; NUMBER
Research-Areas	Thermodynamics; Chemistry; Mechanics; Physics
Web-of-Science-Categories	Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied
Number-of-Cited-References	33
Usage-Count-Since-2013	4
Journal-ISO	Int. J. Thermophys.
Doc-Delivery-Number	TU602