title: Molecular mass determination of polyamic acid ionic salt by size-exclusion chromatography.
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.
authors.affiliation: Group: Advanced Polymers and Chemicals Cluster, Institute of Materials Research and Engineering, 3 Research Link, Singapore 117 602 Singapore.
authors.forename: P Santhana Gopala
authors.initials: PS
authors.lastname: Krishnan
authors.forename: S
authors.initials: S
authors.lastname: Veeramani
authors.forename: Rohit H
authors.initials: RH
authors.lastname: Vora
authors.forename: Tai-Shung
authors.initials: TS
authors.lastname: Chung
authors.forename: Shun-Ichiro
authors.initials: S
authors.lastname: Uchimura
authors.forename: Hatsuo
authors.initials: H
authors.lastname: Sugitani
mesh_terms: D002138:Calibration; D002850:Chromatography, Gel / Q000379:methods*; D007477:Ions; D008970:Molecular Weight; D009757:Nylons / Q000737:chemistry*; D012015:Reference Standards; D012492:Salts / Q000737:chemistry*
chemical_list: D007477:Ions; D009757:Nylons; D012492:Salts