New Methods for Determining the Molecular Weight of Polyaniline by Size Exclusion Chromatography
| Autor: | Phillip N. Adams, Russell M. Goering, Benjamin R. Mattes, Dali Yang |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Conductive polymer
chemistry.chemical_classification Elution Mechanical Engineering Size-exclusion chromatography Metals and Alloys Analytical chemistry Polymer Condensed Matter Physics Electronic Optical and Magnetic Materials Gel permeation chromatography chemistry.chemical_compound chemistry Mechanics of Materials Polyaniline Materials Chemistry Molar mass distribution Lithium chloride |
| Zdroj: | Synthetic Metals. :293-294 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/s0379-6779(02)00529-5 |
| Popis: | Aggregation of polyaniline emeraldine base dissolved in polar aprotic solvents containing lithium chloride salt results in distorted non-Gaussian elution peaks in the size exclusion chromatogram. This results in significant error for the calculation of the weight average and number average molecular weights measured by size exclusion chromatography. We compare the effectiveness of LiCl, LiBr, and LiBF 4 , for limiting polymer aggregation in a high molecular weight sample of polyaniline, and thereby improving chromatographic peak shape. Weight average and number average molecular weight values were most accurately determined for dilute polyaniline in NMP solutions containing LiBF 4 . |
| Databáze: | OpenAIRE |
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