It is clear the same process is being monitored by the two techniques though there is a systematic discrepancy, by more than a factor of two for the 10 wt% solution, between 𝑀 ̅ 𝐷 and average m/z ratio of these mixtures. Given that the m/z ratio is expected to track with 𝑀 ̅ 𝑛 , while the critical MW for gelation (< 3400 g mol -1 for the sol phase) will be correlated with 𝑀 ̅ 𝑤 ,51 and thus 𝑀 ̅ 𝐷 , the magnitude of the discrepancy is what one might expect for a polydisperse sample, bearing in mind the concentration dependent, aggregation of MAO in solution.