Accession Number : ADD095181

Title :   Heat Capacity and Other Thermodynamic Properties of Linear Macromolecules. III. Polyoxides,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Gaur, Umesh ; Wunderlich, Bernhard

Report Date : Jan 1981

Pagination or Media Count : 54

Abstract : The heat capacity of poly(oxymethylene), poly(oxyethylene), poly(oxytrimethylene), poly(oxytetramethylene), poly(oxyoctamethylene), poly(oxypropylene), poly(oxymethylenoxyethylene), poly(oxymethyleneoxytetramethylene), poly(oxy-1,4phenylene), poly(xoy-2,6-dimethyl-1,4-phenylene), poly(oxy-2,6-diphenyl-1-4phenylen) and poly(oxy-2,2-bis(chloromethyl)trimethylene is reviewed on the basis of measurements on 35 samples reported in the literature. The crystallinity dependence is critically evaluated and a set of recommended data for each polyoxide is derived. Entropy, enthalpy, and Gibbs energy functions are calculated. The data have been compared to that of polyethylene and the contribution of -0-group has been evaluated. This paper is the third in a series which will ultimately cover all heat capacity measurements on linear macromolecules.

Descriptors :   *THERMODYNAMIC PROPERTIES, *HEAT OF FUSION, *CRYSTALLIZATION, *MACROMOLECULES, *POLYOXYETHYLENE, LINEAR SYSTEMS, CRYSTALS, ENTHALPY, ENTROPY, TRANSITIONS, FUSION(MELTING), OXIDES

Subject Categories : Inorganic Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE