1,4-Benzenedicarboxylic acid, polymer with 1,4-butanediol
- Monomer Formula: C12H12O4
- Monomer Molecular weight: 220.2213
- CAS Registry Number: 26062-94-2
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: plastic; Poly(butylene terephthalate)
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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
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 60.7 | 280. | Cheng, Pan, et al., 1988 | glass phase; T = 210 to 560 K. Data given graphically. Cp (J/mol*K) = 0.000713 T2 + 0.5203 T + 52.16 (220 to 280 K) for semicrystal. |
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 |
|---|---|---|---|
| 7.6004 | 498.0 | Karyakin and Shvetsova, 1982 | Extrapolated to 100% crystallinity. H = 17500 J/mol Actual measurement for 55.5% crystallinity. |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 15.3 | 498.0 | Karyakin and Shvetsova, 1982 | Extrapolated |
Temperature of phase transition
| Ttrs (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|
| 248. | crystaline, III | crystaline, II | Cheng, Pan, et al., 1988 | Glass transition for amorphous sample. |
| 320. | crystaline, II | crystaline, I | Cheng, Pan, et al., 1988 | Glass transition for semicrystalline sample. |
| 518. | crystaline, I | liquid | Cheng, Pan, et al., 1988 |
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.
Cheng, Pan, et al., 1988
Cheng, S.Z.D.; Pan, R.; Wunderlich, B.,
Thermal analysis of poly(butylene terephthalate) for heat capacity, rigid-amorphous content, and transition behavior,
Makromol. Chem., 1988, 189, 2443-2458. [all data]
Karyakin and Shvetsova, 1982
Karyakin, N.V.; Shvetsova, K.G.,
Thermodynamics of reactions of 1,4-butanediol with terephthalic acid and its derivatives,
Deposited Doc. SPSTL 861 Khp-D82, 1982, 14pp. [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 Ttrs Temperature of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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