Konzentrations- und Temperaturabhängigkeit der Viskosität von Polyacrylnitril-Lösungen in Dimethylformamid

摘要

Viscosity measurements were carried out with polyacrylonitrile dissolved in dimethylformamide up to 0.36 g/ml. The temperature range was 20°C to 130°C, the highest shear gradient applied, 5.6·103s−1. The temperature variation of viscosity is reproduced with sufficient accuracy by the equation ν=k·exp (Q/RT). BothkandQincrease as concentration increases, and the viscosity increases withc1.12toc6.4Inverse proportionality appears to exist between concentration and the longest relaxatio