trans-1,4-Polybutadiene
- Monomer Formula: C4H6
- Monomer Molecular weight: 54.0904
- CAS Registry Number: 25038-44-2
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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°solid,1 bar | 21.80 | cal/mol*K | N/A | Grebowicz, Aycock, et al., 1986 |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 20.93 | 298.2 | Grebowicz, Aycock, et al., 1986 | T = 10 to 500 K. |
| 31.26 | 298.15 | Dainton, Evans, et al., 1962 | T = 20 to 345 K. |
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 |
|---|---|---|---|---|
| 437. | crystaline, I | liquid | Grebowicz, Aycock, et al., 1986 |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 1.907 | 356. | crystaline, II | crystaline, I | Grebowicz, Aycock, et al., 1986 | Fully ordered/conformationally disordered transition. |
| 0.8260 | 317. | crystaline, II | crystaline, I | Dainton, Evans, et al., 1962 |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 5.23 | 356. | crystaline, II | crystaline, I | Grebowicz, Aycock, et al., 1986 | Fully |
| 2.58 | 317. | crystaline, II, Solid | crystaline, I, solid transition is a linear to helical crystal structure | Dainton, Evans, et al., 1962 |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Grebowicz, Aycock, et al., 1986
Grebowicz, J.; Aycock, W.; Wunderlich, B.,
Heat capacities of 1,4-polybutadienes,
Polymer, 1986, 27, 575-582. [all data]
Dainton, Evans, et al., 1962
Dainton, F.S.; Evans, D.M.; Hoare, F.E.; Melia, T.P.,
Thermodynamic functions of linear high polymers. Part V. cis- and trans-1,4-Polybutadiene,
Polymer, 1962, 3, 297-309. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) 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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