Measurement and Prediction of H2O Outgassing Kinetics from Silica-Filled Polydimethylsiloxane TR55 and S5370
The isoconversional technique was employed for the measurement and prediction of H2O outgassing kinetics from silica-filled polydimethylsiloxane TR55 and S5370 in a vacuum or dry environment. Isoconversional analysis indicates that the energy barrier for H2O release from TR55 and S5370 is an increasing function of the fractional H2O release. This can be interpreted as the release of H2O from physisorbed water and then chemisorbed water with decreasing OH density from the surfaces of the embedded silica particles. Model independent predictions of H2O outgassing based on the measured kinetics follow the trend of actual isothermal outgassing at elevated temperatures, and suggest gradual outgassing in dry storage over many decades at low temperatures for both TR55 and S5370.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 915209
- Report Number(s):
- UCRL-JRNL-224042; TRN: US0804914
- Journal Information:
- Journal of Vacuum Science and Technology A, vol. 25, no. 3, May 1, 2007, pp. 597-600, Journal Name: Journal of Vacuum Science and Technology A, vol. 25, no. 3, May 1, 2007, pp. 597-600
- Country of Publication:
- United States
- Language:
- English
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