1,4-Benzenedicarboxylic acid, polymer with 1,4-butanediol


Condensed phase thermochemistry data

Go To: Top, Phase change data, References, Notes

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 (J/mol*K) Temperature (K) Reference Comment
254.280.Cheng, Pan, et al., 1988glass 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

Go To: Top, Condensed phase thermochemistry data, References, Notes

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 (kJ/mol) Temperature (K) Reference Comment
31.800498.0Karyakin and Shvetsova, 1982Extrapolated to 100% crystallinity. H = 17500 J/mol Actual measurement for 55.5% crystallinity.

Entropy of fusion

ΔfusS (J/mol*K) Temperature (K) Reference Comment
64.0498.0Karyakin and Shvetsova, 1982Extrapolated

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
248.crystaline, IIIcrystaline, IICheng, Pan, et al., 1988Glass transition for amorphous sample.
320.crystaline, IIcrystaline, ICheng, Pan, et al., 1988Glass transition for semicrystalline sample.
518.crystaline, IliquidCheng, Pan, et al., 1988 

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.

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