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Molecular mass determination of polyamic acid ionic salt by size-exclusion chromatography
P Santhana Gopala Krishnan1, S Veeramani, Rohit H Vora
1Group: Advanced Polymers and Chemicals Cluster, Institute of Materials Research and Engineering, 3 Research Link, Singapore 117 602 Singapore.
Journal of Chromatography. A
|November 29, 2002
Abstract:
A methodology was developed for the determination of molecular weight aveages of polyamic acid ionic salt (PAS) by size-exclusion chromatography (SEC). Polystyrene standards were used for calibration and THF-DMF 1:1 by volume containing 0.06 M LiBr and 0.06 M H3PO4 was used as the mobile phase. The proposed methodology was found to be reproducible.