Characterization by SEC Combined with Polymerization Model Predictions: Determination of Polymer Chain Branching

MEIRA, G.; CASIS, N.; RODRÍGUEZ, V.; GUGLIOTTA, L.; VEGA, J.R.; ESTENOZ, D.

Primosten (Croacia)

Simposio; 14th. International Symposium on Separation Science: New Achievements in Chromatography; 2008

Some polymerization models enable to predict the detailed molecular structure of the generated polymer. Unfortunately however, many of such predictions cannot be verified with the existent characterization technologies. For example, the determination of the distribution of chain branching (DB) by SEC-viscometry is subject to large propagation errors; and require to input  the value of the empirical exponent that interrelates the "g" and "g´" contraction parameters. This paper deals with improving SEC estimates with the help of polymerization model predictions.