Thermodynamic Properties of Polyethylene Predicted from Paraffin Data

Thermodynamic data on the n-paraffins from n-C(6)H(14) through n-C(18)H(38) have been used to obtain values for the specific heat, entropy, enthalpy, and Gibbs free energy of a large, ideal CH(2)-chain crystal from 0 to 420 °K and of the liquid above 200 °K. Analytical expressions are given for the...

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Detalles Bibliográficos
Autor principal: Broadhurst, Martin G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1963
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319452/
https://www.ncbi.nlm.nih.gov/pubmed/31580582
http://dx.doi.org/10.6028/jres.067A.023
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author Broadhurst, Martin G.
author_facet Broadhurst, Martin G.
author_sort Broadhurst, Martin G.
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description Thermodynamic data on the n-paraffins from n-C(6)H(14) through n-C(18)H(38) have been used to obtain values for the specific heat, entropy, enthalpy, and Gibbs free energy of a large, ideal CH(2)-chain crystal from 0 to 420 °K and of the liquid above 200 °K. Analytical expressions are given for the properties of the crystal and liquid above 200 °K. For the crystal, a modified Einstein function was used to adjust the melting temperature to 414.3 °K. Values between 975 and 1025 cal/mole for the heat of fusion were found to be the ones most consistent with the data. Comparison of the results with polyethylene data shows reasonable agreement.
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spelling pubmed-53194522019-10-01 Thermodynamic Properties of Polyethylene Predicted from Paraffin Data Broadhurst, Martin G. J Res Natl Bur Stand A Phys Chem Article Thermodynamic data on the n-paraffins from n-C(6)H(14) through n-C(18)H(38) have been used to obtain values for the specific heat, entropy, enthalpy, and Gibbs free energy of a large, ideal CH(2)-chain crystal from 0 to 420 °K and of the liquid above 200 °K. Analytical expressions are given for the properties of the crystal and liquid above 200 °K. For the crystal, a modified Einstein function was used to adjust the melting temperature to 414.3 °K. Values between 975 and 1025 cal/mole for the heat of fusion were found to be the ones most consistent with the data. Comparison of the results with polyethylene data shows reasonable agreement. [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology 1963 1963-06-01 /pmc/articles/PMC5319452/ /pubmed/31580582 http://dx.doi.org/10.6028/jres.067A.023 Text en https://creativecommons.org/publicdomain/zero/1.0/ The Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
spellingShingle Article
Broadhurst, Martin G.
Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title_full Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title_fullStr Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title_full_unstemmed Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title_short Thermodynamic Properties of Polyethylene Predicted from Paraffin Data
title_sort thermodynamic properties of polyethylene predicted from paraffin data
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319452/
https://www.ncbi.nlm.nih.gov/pubmed/31580582
http://dx.doi.org/10.6028/jres.067A.023
work_keys_str_mv AT broadhurstmarting thermodynamicpropertiesofpolyethylenepredictedfromparaffindata

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