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
Descripción
Sumario: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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