Poly(diethylsiloxane)
- Monomer Formula: C4H10OSi
- Monomer Molecular weight: 102.2071
- CAS Registry Number: 28323-47-9
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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 |
|---|---|---|---|
| 0.6874 | 295. | Kulagina and Lebedev, 1982 | Degree of crystallinity = 100%. |
Entropy of fusion
| ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 2.33 | 295. | Kulagina and Lebedev, 1982 | Degree |
Enthalpy of phase transition
| ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 0.6501 | 206.7 | crystaline, III | crystaline, II | Varma-Nair, Wesson, et al., 1989 | 100% crystallinity/condis crystal. |
| 0.4398 | 282.7 | crystaline, II | crystaline, I | Varma-Nair, Wesson, et al., 1989 | Condis crystal/viscous crystal. |
| 0.0552 | 308.5 | crystaline, I | liquid | Varma-Nair, Wesson, et al., 1989 | |
| 0.6501 | 206.7 | crystaline, III | crystaline, II | Varma-Nair, Wesson, et al., 1989 | 100% crystallinity/condis crystal. |
| 0.4398 | 282.7 | crystaline, II | crystaline, I | Varma-Nair, Wesson, et al., 1989 | Condis crystal/viscous crystal. |
| 0.0552 | 308.5 | crystaline, I | liquid | Varma-Nair, Wesson, et al., 1989 | |
| 0.4947 | 203. | crystaline, II | crystaline, I | Lebedev, Kulagina, et al., 1984 | Degree of crystallinity = 72%. |
| 0.6874 | 295. | crystaline, I | liquid | Lebedev, Kulagina, et al., 1984 | Degree of crystallinity = 100%. |
| 0.4947 | 203. | crystaline, II | crystaline, I | Kulagina and Lebedev, 1982 | Degree of crystallinity = 72%. |
Entropy of phase transition
| ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.44 | 203. | crystaline, II | crystaline, I | Lebedev, Kulagina, et al., 1984 | Degree |
| 2.33 | 295. | crystaline, I | liquid | Lebedev, Kulagina, et al., 1984 | Degree |
| 2.44 | 203. | crystaline, II | crystaline, I | Kulagina and Lebedev, 1982 | Degree |
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.
Kulagina and Lebedev, 1982
Kulagina, T.G.; Lebedev, B.V.,
Thermodynamics of 2,2,4,4,6,6-hexaethylcyclotrisiloxane, its polymerization,
and the resulting poly(diethylsiloxane) in the 0-330 K range, 1982, Termodin. [all data]
Varma-Nair, Wesson, et al., 1989
Varma-Nair, M.; Wesson, J.P.; Wunderlich, B.,
The thermal properties of polysiloxanes poly(dimethyl siloxane) and poly(diethyl siloxane),
J. Therm. Anal., 1989, 35(6), 1913-1939. [all data]
Lebedev, Kulagina, et al., 1984
Lebedev, B.V.; Kulagina, T.G.; Svistunov, V.S.; Papkov, V.S.; Zhdanov, A.A.,
Calorimetric study of 1,1,3,3,5,5-hexaethylcyclotrisiloxane and polydiethysiloxane and the process of polymerization of 1,1,3,3,5,5-hexaethylcyclotrisiloxane in the range 13-330 K,
Vysokomol. Soedin., 1984, A26, 2476-2482. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔHtrs Enthalpy of phase transition ΔStrs Entropy 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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