Poly(diethylsiloxane)
- Monomer Formula: C4H10OSi
- Monomer Molecular weight: 102.2071
- CAS Registry Number: 28323-47-9
- Information on this page:
- Other data available:
- Options:
Phase change data
Go To: Top, 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 |
|---|---|---|---|
| 2.876 | 295. | Kulagina and Lebedev, 1982 | Degree of crystallinity = 100%. |
Entropy of fusion
| ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 9.75 | 295. | Kulagina and Lebedev, 1982 | Degree |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 2.720 | 206.7 | crystaline, III | crystaline, II | Varma-Nair, Wesson, et al., 1989 | 100% crystallinity/condis crystal. |
| 1.840 | 282.7 | crystaline, II | crystaline, I | Varma-Nair, Wesson, et al., 1989 | Condis crystal/viscous crystal. |
| 0.231 | 308.5 | crystaline, I | liquid | Varma-Nair, Wesson, et al., 1989 | |
| 2.720 | 206.7 | crystaline, III | crystaline, II | Varma-Nair, Wesson, et al., 1989 | 100% crystallinity/condis crystal. |
| 1.840 | 282.7 | crystaline, II | crystaline, I | Varma-Nair, Wesson, et al., 1989 | Condis crystal/viscous crystal. |
| 0.231 | 308.5 | crystaline, I | liquid | Varma-Nair, Wesson, et al., 1989 | |
| 2.070 | 203. | crystaline, II | crystaline, I | Lebedev, Kulagina, et al., 1984 | Degree of crystallinity = 72%. |
| 2.876 | 295. | crystaline, I | liquid | Lebedev, Kulagina, et al., 1984 | Degree of crystallinity = 100%. |
| 2.070 | 203. | crystaline, II | crystaline, I | Kulagina and Lebedev, 1982 | Degree of crystallinity = 72%. |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 10.2 | 203. | crystaline, II | crystaline, I | Lebedev, Kulagina, et al., 1984 | Degree |
| 9.75 | 295. | crystaline, I | liquid | Lebedev, Kulagina, et al., 1984 | Degree |
| 10.2 | 203. | crystaline, II | crystaline, I | Kulagina and Lebedev, 1982 | Degree |
References
Go To: Top, Phase change data, Notes
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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.