ISSN:
0887-6266
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Through new measurements and from literature data, the heat capacity of all liquid polyfluoroethylenes could be established as: \documentclass{article}\pagestyle{empty}\begin{document}$$C_p = N_{\rm F} \left( {104.749 + 0.0568{\rm T}} \right) + \left( {1 - N_{\rm F} } \right)\left( {36.840 + 0.0854T} \right)$$\end{document} above 480 k, and as \documentclass{article}\pagestyle{empty}\begin{document}$$C_p = N_{\rm F} \left( {54.976 + 0.162{\rm T}} \right)\left( {1 - N_{\rm F} } \right)\left( {37.754 + 0.0829T} \right) $$\end{document} below 480 K in J/(K mol), where NF is the mole fraction of F atoms. In connection with previously established heat capacities of the solid polymers, enthalpies, entropies, and residual entropies of the glassy state at 0 K were computed. Data for liquid polychloroethylenes are much less complete, and the thermodynamic functions could only be established for liquid poly(vinyl chloride) and compared with the data for solid poly(vinyl chloride), poly(vinylidene chloride), and polychlorotrifluoroethylene.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/polb.1987.090251111
