Characterization of methylalumoxane by means of gel permeation chromatography

Characterization of methylalumoxane (MAO) by gel permeation chromatography reveals the presence of different oligomeric products. Using suitable series of columns and alkylaluminium compounds with known molecular weight, it is possible to obtain the average molecular weights of most species which are present in a sample of MAO. The study of the chromatograms reveals modifications in composition of the MAO oligomers in relation to the time of residence in solution at given temperatures.