Abstract
This study tried to clarify the relationship between storage conditions and property changes of polymer aqueous solutions using two types of powdery polymer flocculants. Specifically, the determination of the dissolution time when preparing the aqueous solution was examined, firstly. Next, the UV-visible spectrum and the colloid equivalent of each sample were measured by varying the polymer concentration in the aqueous solution, storage temperature and storage time. Then the relationship between properties and deterioration was considered.
As a result, the dissolution time of the polymer aqueous solution was determined by using the electric conductivity, and the polymer aqueous solution was prepared based on this procedure. In the experiments of the relationship between storage conditions and property, the structural change based on the hydrolysis of polymer aqueous solutions was analyzed by the UV-visible spectrum. The colloidal equivalent tended to decrease significantly with the longer storage time and higher storage temperature, which is considered that the dissociating groups lost their charge as the hydrolysis proceeded.
