Scattering function of non-substituted cellulose dissolved in N-methylmorpholine-N-oxide-monohydrate

The solution state of non-substituted cellulose dissolved in the monohydrat e of N-methylmorpholine-N-oxide was investigated by static light scattering measurements. Molecular masses of the cellulose of several millions g/mol were observed. The overall particle scattering function can be separated in to two individually scattering contributions. Two models could explain such a behaviour. First, the results reflect a bimodal distribution of the diss olved polymer consisting of large and small aggregates. The second attempt at an explanation is based on the model of a fringed micelle. The light sca ttering on different parts of the micelles, the core and the fringes causes the discussed scattering function. The angular dependence of the scatterin g intensity is simulated by superposition of particle scattering functions and parameter fit.