Heat capacities of solid polymers (The Advanced THermal Analysis System, ATHAS) [electronic resource]
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| Online Access: |
Online Access |
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| Corporate Authors: | , |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1990.
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| Subjects: |
| Abstract: | The thermal properties of solid, linear macromolecules are accessible through heat capacity measurements from about 10 K to the glass transition. By measuring and collecting data on over 150 polymers, a data bank was established and used as a base for detailed correlation with an approximate frequency spectrum for the polymers. Besides assessment of the entropy at zero kelvin of disordered polymers, this heat capacity knowledge has helped in the elucidation of partial phase transitions and conformationally disordered crystal phases. A link has also been established to measurements of mobility through solid state nuclear magnetic resonance. Most recently heat capacity measurements have been linked to full dynamic simulations of crystal segments of 1900 chain atoms. Questions of disorder and anharmonicity can thus be analyzed. The work is summarized as the Advanced Thermal Analysis System, ATHAS. 27 refs., 26 figs. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 01/01/1990. "conf-900268-1" "DE90007130" 3. Minerals, Metals and Materials Society world symposium on lead-zinc (Pb-Zn) and related metals, Anaheim, CA (USA), 18-21 Feb 1990. Wunderlich, B. |
| Physical Description: | Pages: (18 p) : digital, PDF file. |