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Poly[oxy(dimethylsilylene)]


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
liquid154.6J/mol*KN/ALebedev, Mukhina, et al., 1978 
Quantity Value Units Method Reference Comment
solid,1 bar150.394J/mol*KN/AVarma-Nair, Wesson, et al., 1989amorphous phase
solid,1 bar135.769J/mol*KN/AVarma-Nair, Wesson, et al., 1989 

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
154.6298.15Lebedev, Mukhina, et al., 1978T = 8 to 332 K.

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
117.775298.15Varma-Nair, Wesson, et al., 1989amorphous phase; T = 0.10 to 550 K. Cp(liq) = 0.1215T + 81.55 J/mol*K (146 to 340 K).
120.274298.15Varma-Nair, Wesson, et al., 1989T = 0.10 to 550 K. Cp(c) = exp[0.0189189(lnT)3 - 0.402175(lnT)2 + 3.35144(lnT) - 4.78444] J/mol*K (5 to 146 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

DeltafusH (kJ/mol) Temperature (K) Reference Comment
2.750219.Varma-Nair, Wesson, et al., 1989100% crystallinity.
2.750219.Varma-Nair, Wesson, et al., 1989100% crystallinity.
4.540246.Lebedev, Mukhina, et al., 1978Degree of crystallinity is 67%.

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
18.6246.Lebedev, Mukhina, et al., 1978Degree

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.

Lebedev, Mukhina, et al., 1978
Lebedev, B.V.; Mukhina, N.N.; Kulagina, T.G., Thermodynamics of polydimethylsiloxane in the range 0-350°K, Vysokomol. Soedin., 1978, A20, 1297-1303. [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]


Notes

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