Good thermal stability. It can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liquid. after long-term storage, the viscosity of the solution will decrease due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor. [1] Polyacrylamide is used as lubricant, suspending agent, clay stabilizer, oil displacing agent, fluid loss reducer and thickener in drilling, acidizing, fracturing, water plugging, well cementing and secondary oil recovery, tertiary oil recovery It has been widely used and is an extremely important oilfield chemical.