BREEN, C. (1994). Thermogravimetric, infrared and mass spectroscopic analysis of the desorption of tetrahydropyran, tetrahydrofuran and 1,4-dioxan from montmorillonite. Clay Minerals, 29 (1), 115-121.Full text not available from this repository.
The desorption of tetrahydropyran (THP), tetrahydrofuran (THF) and 1,4-dioxan (DIOX) from Na+-, Ca2+-. Al3+- and Cr3+-exchanged montmorillonite has been studied using variable temperature infrared spectroscopy and thermogravimetric analysis. The derivative thermograms for the desorption of each cyclic ether exhibited three maxima but there was little uniformity in the temperatures at which these maxima occurred. Nonetheless, the desorption of both THP and THF occurred at lower temperatures in the Cr3+-exchanged form than in the Al3+-form. The desorption of DIOX showed little cationic dependence. Mass spectroscopic analysis of the thermally evolved vapours indicated that no transformation products were desorbed at temperatures less-than-or-equal-to 230-degrees-C.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Polymers Nanocomposites and Modelling Research Centre > Polymers, Composites and Spectroscopy Group|
|Depositing User:||Jill Hazard|
|Date Deposited:||14 May 2010 14:36|
|Last Modified:||28 Sep 2010 16:12|
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