Gel permeation chromatographic analysis of poly-(2-vinylpyridine) samples

✍ Scribed by A. Gourdenne; N. Hoduc; H. Daoust

• Book ID: 104146338
• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 600 KB
• Volume: 74
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)86152-5

✦ Synopsis

Satisfactory gel permeation chromatographic (GPC) analysis of poly-(2-vinylpyridine) (PVP) has been achieved by using Porasil-packed columns and N,'N-dimethylformamide (DMF) as eluent at 50"~ The polymer samples were prepared by anionic polymerization; well defined polystyrene fractions were used for calibration. The standard log rw = f(I/,) plot seems to be satisfactory as a calibration curve. Viscosity measurements were made in the same solvent at 50" for the two series of pol$mer samples in order to test the universality of BENOIT and co-workers' log b7lm, = f(ve) plot. However, the results for the two polymers do not fall on a single line because the column support is not inert towards PVP. The longer retention time for PVP is believed to be caused by some specific interaction between glass beads and PVP; this interaction was not entirely overcome by using a strongly polar solvent such as DMF. The molecular weight distribution curve from GPC analysis was compared with that obtained from sedimentation analysis; the discrepancy between the two curties may be explained by the creation of some reverse GPC.