Polyamic acid was analyzed using organic solvent SEC (GPC) column, GPC LF-804. Polyamic acid is a precursor of polyimide. It is a multi-ionic polymer which contains positive and negative electric charges. Here, analysis under two different mobile phases were compared: (1) NMP alone and (2) with LiBr and phosphoric acid added to NMP. By adding LiBr and phosphoric acid, ionic interactions was suppressed and this resulted in producing better (sharper) peak shape.
Sample : Polyamic acid, Poly(pyromellitic dianhydride-co-4,4'-oxydianiline), 100 μL
Sample : Polyamic acid, Poly(pyromellitic dianhydride-co-4,4'-oxydianiline), 100 μL
Columns : Shodex GPC LF-804 (8.0 mm I.D. x 300 mm) x 2 Eluent : (30 mM LiBr + 30 mM H3PO4) in NMP (upper), NMP (lower) Flow rate : 0.7 mL/min Detector : RI Column temp. : 50 °C
Sample Name Index
Operation Manual / Certificate of Analysis
Operation Manuals and Certificate of Analysis / Inspection Certificate for the following products can be downloaded here.
Product Name Index
Applications
- Polystyrene Standards (10) (Toluene Eluent)
- Polystyrene Standards (19) (DMAc Eluent) (KF-806L)
- Polystyrene Standards (20) (NMP Eluent) (KF-806L)
- Polystyrene Standards (22) (DMAc Eluent) (LF-804)
- Silicone Oil (Toluene Eluent) (K-806M)
- Dimethyl Silicone Oil (Toluene Eluent)
- Rubber (Tluene Eluent)
- Melamine-Formaldehyde Resin Prepolymers (Mixed Solvent Eluent)
- Epoxy Resin (3) (Mixed Solvent Eluent)
- p-Cresol Formaldehyde Resol Resin (Mixed Solvent Eluent)
- Phenol Formaldehyde Novolac Resin (Mixed Solvent Eluent)
- Poly(-N,N-Dimethylaminomethyl Styrene) (2) (Comparison of Various Eluent Condition)
- Lignin (LF-804)
- Xylan (LF-804)
- Polyamic Acid (2) (LF-804)
- Polyamic Acid (3) (LF-804)
- Cellulose (KD-806M)
- Biodegradable Polymer (1) (Poly(Lactic-co-Glycolic Acid)) (GF-7M HQ)
- Biodegradable Polymer (5) (Poly(Lactic-co-Glycolic Acid)) (KF-804L)
- Pullulan Standards (8) (LF-804)
- Poly(Ethylene Oxid) and Poly(Ethylene Glycol) Standards (2) (LF-804)
- Poly(Methyl Methacrylate) (2) (Eluent: Methyl Ethyl Ketone) (LF-804)
- Ammonio Methacrylate Copolymer (GF-510 HQ)
- Methacrylic Acid Copolymer (KF-806M)
- Absolute Molecular Weight Determination of PMMA (LB-802.5)
Applications (Related Information)
- Calibration Curves for KF-806L (Various Eluents: PS)
- Calibration Curve for LF-804 (DMAc Eluent: PEG, PEO)
- Calibration Curve for LF-804 (DMAc Eluent: PS)
- Calibration Curve for LF-804 (NMP Eluent: PEG, PEO)
- Calibration Curve for LF-804 (NMP Eluent: PS)
- Calibration Curve for LF-804 (Methyl Ethyl Ketone Eluent: PMMA)
- Calibration Curve for LF-804 (DMSO/DMF Eluent: Pullulan)
- Calibration Curves for GF-HQ Series (Methanol Eluent: PEG, PEO)
- Calibration Curves for GF-HQ Series (Acetone Eluent: PMMA)