The Rheologic Behaviours Of The Aqueous Solution Of Partially Hydrolyzed Polyacrylamide

Water-soluble polymers have been widely used in many industrial fields, such as exploitation of oil, the disposal of waste water, solar energy, adhesive, fuel battery, recovery and separation of heavy metals as well as biomedical fields. Because of their particular properties, water-soluble polymers have been developed rapidly. Polyacrylamide is one of water-soluble polymers which are used most widely in industries. Polyacrylamide and its derivant can be used for flocculant, thickener, paper reinforcing agent, drag reduction agent of liquid and so on, and they are widely used in the disposal of waste water, paper manufacturing, petroleum, coal, textiles, construction as well as other industrial areas.As for the wide application of water-soluble polymers in the field of petroleum exploitation, in this paper, the rheologic behaviours of partially hydrolyzed polyacrylamide were studied by using Haake rheometer under various concentration, molecular weight, surfactants, saline solution and alkaline solution. The results showed that:In a certain shear rate, the relationship of the first normal stress difference with the shear rate of partially hydrolyzed polyacrylamide solution obey a power-law relation; At the same shear rate, the higher the concentration of the polymer, the greater the first normal stress difference is; The normal stress and first normal-stress difference of partially hydrolyzed polyacrylamide solution decreased with the increasing concentration of surfactant alkaline solution and saline solution. The dynamic experimental results indicated that the linear viscoelastic region broadened with the increasing concentration of HPAM solution and the corresponding storage modulus and loss modulus increased with the increasing shearing frequency; The complex elastic modulus increased with the increasing concentration of surfactant but decreased with the the increasing concentration of alkaline solution and saline solution.In a word, the properties of HPAM solution were discussed overall in this paper, moreover, the results were more significant for the application of water-soluble polymers.