| Autor: |
Dinh LN; Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA. dihn1@llnl.gov, Schildbach MA, Maxwell RS, Siekhaus WJ, Balazs B, McLean W 2nd |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of colloid and interface science [J Colloid Interface Sci] 2004 Jun 01; Vol. 274 (1), pp. 25-32. |
| DOI: |
10.1016/j.jcis.2003.12.052 |
| Abstrakt: |
Temperature-programmed desorption/decomposition (TPD) was employed to obtain the moisture content and outgassing kinetics of TR55, a silica-filled cross-linked polysiloxane. The total moisture content of TR55 in the as-received state and after 20-30 min of vacuum pumping in the load-lock prior to TPD was measured to be on the order of 0.35 wt%. Physisorbed H(2)O and chemisorbed H(2)O account for about 13.2 and 86.8%, respectively, of the 0.35 wt% measured moisture content. H(2)O outgassing models based on the kinetics measured from TPD experiments suggest that loosely bound chemisorbed water outgasses in a dry environment slowly but continuously over many decades at or a little above room temperature. However, physisorbed water can be easily pumped out in a matter of hours at around 400 K. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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