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Extracting the density gradient profile of polyethylene glycol from bulk to surface
Other Title(s)
حساب كثافة الشد السطحي لبولي اثيلين كلايكول من العمق الى السطح
Author
Source
Kirkuk University Journal-Scientific Studies
Issue
Vol. 12, Issue 4 (30 Sep. 2017)17 p.
Publisher
Kirkuk University College of Science
Publication Date
2017-09-30
Country of Publication
Iraq
No. of Pages
17
Main Subjects
Abstract EN
In this work the Simha and Somcynsky (SS) lattice hole theory in conjunction with Cahn-Hilliard(CH) model have been used, (SS) theory describes the thermodynamic properties of both low and high molecular weight in terms of hole fraction, On the other hand (CH) describes the free energy profile of polymer surfaces or interfaces as an inhomogeneous mixture.
CH consider the energy density to be two fold.
The first is the constant free energy density for a homogeneous region of the system and the second is the density gradient contribution to the free energy.
Have employed the mentioned theories in derive the new equations to extract in surface tension and surface depth profile in terms of chemical potential by means of SS theory.
Starting form the atmospheric pressure to 150Mpa and for temperature range from 313 to 473 K, Then ıt is found the density profile of polyethylene glycol decrease as it is approached to the surfase.
PVT characteristic parameters of the SS theory are calculated using the data of polyethylene glycol.
the average and maximum value (at polyethylene glycol in different molecular weight) of percentage deviation of specific volume found to be 0.03 and 0.28 respectively.
American Psychological Association (APA)
NURİ, S. M.. 2017. Extracting the density gradient profile of polyethylene glycol from bulk to surface. Kirkuk University Journal-Scientific Studies،Vol. 12, no. 4.
https://search.emarefa.net/detail/BIM-944786
Modern Language Association (MLA)
NURİ, S. M.. Extracting the density gradient profile of polyethylene glycol from bulk to surface. Kirkuk University Journal-Scientific Studies Vol. 12, no. 4 (Sep. 2017).
https://search.emarefa.net/detail/BIM-944786
American Medical Association (AMA)
NURİ, S. M.. Extracting the density gradient profile of polyethylene glycol from bulk to surface. Kirkuk University Journal-Scientific Studies. 2017. Vol. 12, no. 4.
https://search.emarefa.net/detail/BIM-944786
Data Type
Journal Articles
Language
English
Notes
Record ID
BIM-944786