Détermination de la viscosité intrinsèque de solutions de polymères par une simple détermination de la viscosité

✍ Scribed by O. F. Solomon; I. Z. Ciutǎ

• Publisher: John Wiley and Sons
• Year: 1962
• Tongue: English
• Weight: 226 KB
• Volume: 6
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1962.070062414

✦ Synopsis

Abstract

By studying the molecular weights of various solutions of cis‐1,4‐polyisoprene the authors arrived at the formula \documentclass{article}\pagestyle{empty}\begin{document}$$\left[ \eta \right] = \sqrt {2/c} \sqrt {\eta _{sp} - {\rm l}n\eta } _{rel} $$\end{document} which allowed the calculation of the intrinsic viscosity of the polymer solutions by a single viscosity determination. The formula was verified for different systems of polymer–solvent and the values are in accord with those obtained by extrapolation. An operating concentration of about 0.2% is recommended.