Rheological properties of chitosan blends with poly (ethylene oxide) and poly (vinyl alcohol) in solution

摘要

The present work is concerned with experimental results on rheological characteristics of active chitosan salt blends with water solution of PEO and PVA. Flow measurements were carried out on solutions of pure polymers; chitosan (with deacetylation degree DD = 73. 3/100 and M_w = 3.2 × 10~-5), PEO (M_w = 1 × 10~5) and PvA (M_w ow) of various concentrations and their blends with various weight fractions of components. Rheological parameters of Rheological power lay, such as n, A and E_a (activation energy of viscous flow) with varying weight fraction of chitosan in blend solutions are calculated and discussed.