ISSN:
1573-4846
Keywords:
polymer
;
spectroscopy
;
modifying agent
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Two chemical routes were employed to prepare Si-Ti polymers, using acetylacetone (acacH) and acetic acid (HOAc) as modifying agents. The homogeneous and transparent sols were studied at different aging times. The characterization techniques were 29Si NMR, FTIR, UV-Vis and TGA. When HOAc was used, the oligomeric species in the first stages of polymerization were assigned by 29Si NMR. The Ti–O–Si bond vibration was detected by FTIR in the 950–960 cm–1 region. UV-Vis spectroscopy showed bands of acac bonded to Ti at 300 nm and 365 nm, and OAc– bonded to Ti was found at 320 nm. The TGA study allowed the establishment of the xerogel formulas.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1026441709416
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