Impact Of Hydrophobically Associating Water-soluble Polymer Solution Microstructure And Macroscopic Flow Variability And Surface Active Agents

With the quickly development of national economy, the requirement for water soluble polymer materials increases very fast in various domain. Hydrophobically associating water-soluble polymers, for its special theological properties, have been the hot point of the research working in the world. Such polymers can interact strongly with surfactants in solution resulting in forming the associated complex, which is greatly used in many industrial fields such as enhanced oil, abstersion, coating, life engineering and so on.In this paper, the rheology of hydrophobically associating water-soluble polymer solution and its microstructure had been studied, also the effect of salt, temperature and surfactant. The conclusion as followed:1. The network construction of hydrophobically associating water-soluble polymers had been proved and such network was formed mainly through the hydrophobic microdomain of the interchain as crunode.2. Certain relationship had been proved between the rheology and microstructure of this polymer.3. Salt would change the solution polarity and the electrostatic repulsion of the polymer chains and so bring about the change of the number of microdomain and that of the polarity in micro-environment, make the solution show complicated Theological behavior.4. With fluorescence spectrum, through the test of the change of spectrum speciality of pyrene probe with the type, structure and concentration of the polymer, it can be found that hydrophobically associating water-soluble polymer would form hydrophobic microdomains through the association of hydrophobic groups in polymer chains even at very low concentration, and the number of hydrophobic microdomain would increase with the concentration.5. With the help of fluorescence spectrum and freezing etch electron microscope, we found that surfactant SDS could form compounded microdomain with the hydrophobic groups of polymers, which would result in the increase of the number and the decrease of the volume of hydrophobic microdomain. This would be explained well by "three stage model".6. The cmc of surfactant SDS could be changed by charge effect of NaCl, and so the Theological properties of compounded system would be changed proportionally. Adjusting the proportion of each components, the apparent viscosity could be controlled effectively.In a word, the space network structure inside hydrophobically associating water-soluble polymers' solution was confirmed in this dissertation work. The special structure brings a special Theological properties and interaction method with surfactants.