1-Butene, homopolymer
- Monomer Formula: C4H8
- Monomer Molecular weight: 56.1063
- CAS Registry Number: 9003-28-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Polybutene; Poly(1-butene)
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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 | 24.62 | cal/mol*K | N/A | Dainton, Evans, et al., 1962 | glass phase; When extrapolated to 100% crystallinity, the entropy is 86.6 J/mol*K. |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 26.82 | 298.15 | Dainton, Evans, et al., 1962 | glass phase; T = 20 to 310 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
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 1.675 | 407.8 | Wilski and Grewer, 1964 | Rhombohedral form, 76.0% crystallinity. |
| 1.554 | 360. | Wilski and Grewer, 1964 | Rhombohedral atactic form, 13.0% crystallinity. |
| 0.9739 | 394.6 | Wilski and Grewer, 1964 | Tetragonal form, 76.0% crystallinity. |
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 249. | crystaline | glass | Dainton, Evans, et al., 1962 |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.7010 | 394.6 | crystaline, II | crystaline, I | Wilski and Grewer, 1964 | Rhombohedral to tetragonal. |
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.
Dainton, Evans, et al., 1962
Dainton, F.S.; Evans, D.M.; Hoare, F.E.; Melia, T.P.,
Thermodynamic functions of linear high polymers. Part IV. Stereospecific poly-a-olefines,
Polymer, 1962, 3, 286-296. [all data]
Wilski and Grewer, 1964
Wilski, H.; Grewer, T.,
The specific heat of poly-1-butene, J. Polymer Sci.,
Pt. C, 1964, (6), 33-41. [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 ΔfusH Enthalpy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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