APPLICATION OF SIZE-EXCLUSION CHROMATOGRAPHY TO THE STRUCTURAL STUDY OF POLYORGANOMETALLOSILOXANES

Size exclusion chromatography was employed to elucidate the structure of the organosiloxane moiety in trimethylsiloxy derivatives of organom etallosiloxanes containing Na, K, Ni, Mn, Cu, and Fe. An efficient tec hnique of trimethylsilylation of organometallosiloxanes was developed to minimize alterations in their structure. The TMS derivatives of org anometallosiloxanes were found to exist mostly as a more or less polyd isperse mixture of cyclic poly[phenyltrimethylsiloxy siloxane]s. The p referred size of the cycles depends primarily on the nature of the met al in organometallosiloxane.