B. Mayer, P. Zöllner, H. Kählig
Jul 2, 1999
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0
Influential Citations
20
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Journal
Journal of Chromatography A
Abstract
Abstract Commercially available polysiloxanes containing methyl, phenyl, and cyanoalkyl groups and most frequently used as stationary phases in gas chromatography, were characterized by 1 H and 29 Si nuclear magnetic resonance spectroscopy. Microstructure, molecular weight, end group characteristics, branching, and cyclic by-products were determined for all polymers. The microstructure of an alternating, symmetrically substituted dimethyl, diphenylpolysiloxane (SOP-50) determined by 29 Si nuclear magnetic resonance spectroscopy demonstrated few rearrangements after thermal treatment under gas chromatographic conditions at 420°C.