Rheological Characteristics on Solution of NMMO/Cellulose with Different Degree of Polymerization and its Combination

Impacts of temperature, shear rate, cellulose concentration and DP proportion on rheological behavior of cellulose/NMMO•H2O solution were investigated in this paper; especially put forward a method of mixing different DP cellulose at different proportion to discuss more accurately effect of DP. The results shown that the flow activation energy of 4% cellulose/NMMO•H2O was 24.45kJ/mol, and the temperature 85～115°Cwas suited for its processing. All kinds of cellulose solution with different DP were the pseudoplastic fluid, and had shear thinning characteristic, especially high DP. The cellulose concentration was higher, apparent viscosity of its solution was bigger, but their relationship was not linear. Under the same cellulose concentration, the solution viscosity increased generally in proportion to DP rising, but the solution with proportion 1:1 was one exception, and its viscosity is relatively high.