/sup 1/H NMR studies of the sol-gel transition
Conference
·
OSTI ID:5251903
High resolution /sup 1/H NMR spectroscopy has been employed to study the dynamics of the sol-gel transition in simple silicates. High magnetic fields (360 MHz) were used to detect and identify the various chemical species present in the Si(OCH/sub 2/CH/sub 3/)/sub 4/:C/sub 2/H/sub 5/OH:H/sub 2/O and Si(OCH/sub 3/)/sub 4/:CH/sub 3/OH:H/sub 2/O sol-gel systems. Using these techniques, the time evolution of the reactant and product species were monitored. Results of these studies have shown that acid and base catalyzed systems react along very different chemical pathways and that the elementary hydrolysis and condensation reactions occur on widely different time scales. The use of these experimental data to test possible mechanisms is discussed.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5251903
- Report Number(s):
- SAND-83-1958C; CONF-840258-2; ON: DE84008028
- Country of Publication:
- United States
- Language:
- English
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