Polyoctadiene
- Monomer Formula: C8H12
- Monomer Molecular weight: 108.1809
- CAS Registry Number: 26353-15-1
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°liquid | 52.70 | cal/mol*K | N/A | Lebedev, Lityagov, et al., 1976 | Entropy at zero kelvin of amorphous polyoctadiene was assumed to be equal to the sum of the configurational entropy and the entropy of mixing the cis and the trans forms. S0 = 15.7 J/mol*K. |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 49.09 | 298.15 | Lebedev, Lityagov, et al., 1976 | T = 15 to 328 K. Data deposited in VINITI No. 2097-76, 10 June 1976. |
Phase change data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 168.5 | crystaline, I | glass | Lebedev, Lityagov, et al., 1976 | Heat capacity increment following conversion to glass is 41.3 J/mol*K. |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.0645 | 255. | crystaline, I | liquid | Lebedev, Lityagov, et al., 1976 | T = of anomaly, probably due to fusion of crystal of the cis-form, is 100-255 K. |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.253 | 255. | crystaline, I | liquid | Lebedev, Lityagov, et al., 1976 | T |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Lebedev, Lityagov, et al., 1976
Lebedev, B.V.; Lityagov, V.Ya.; Korshak, K.Yu.V.,
Thermodynamic properties of polyoctadiene in the range 0-328 K,
Zhur. Fiz. Khim., 1976, 50, 2439. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Ttrs Temperature of phase transition ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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