3results about How to "Change thermal stability" patented technology

The invention provides benzocyclobutene-containing aromatic diamine and a preparation method thereof, and the preparation method comprises the following steps: dissolving 3-[1, 4-benzenediol]-bicyclo [4.2. 0]-octyl-1, 3, 5-triene and 4-nitrochlorobenzene in a first organic solvent, and reacting under an alkaline condition to obtain a benzocyclobutene-containing dinitro compound; and dissolving the benzocyclobutene-containing dinitro compound in a second organic solvent, and reducing in a hydrogen atmosphere to obtain the benzocyclobutene-containing aromatic diamine compound. The invention also provides a benzocyclobutene-containing aromatic polyamide polymer and a preparation method thereof. According to the linear aromatic polyamide and the cross-linked aromatic polyamide prepared by the invention, the content of benzocyclobutene in the structure can be adjusted according to a use scene, so that the mechanical strength, the thermal stability and the CTE are changed to adapt to different application requirements, and the linear aromatic polyamide is relatively good in solubility in an organic solvent, so that the linear aromatic polyamide is easy to process and relatively good in film-forming property.

The application relates to an amino acid type gas phase corrosion inhibitor and a preparation method and application thereof, the gas phase corrosion inhibitor comprising amino acids and montmorillonite, and the gas phase corrosion inhibitor comprises the following mass percentage contents: 60-70% of amino acids and 30-40% of modified montmorillonite, the amino acids are alanine, and the modified montmorillonite is organic montmorillonite or carbon dot montmorillonite; the method specifically comprises the following steps: configuring alanine into an alanine aqueous solution, mixing the alanine aqueous solution with organic montmorillonite or carbon dot montmorillonite, heating and stirring, suction filtration and drying, so as to obtain the gas phase corrosion inhibitor. Compared with the prior art, the amino acid type gas phase corrosion inhibitor is compounded with montmorillonite by utilizing the characteristics of the montmorillonite, such as rich pores, large specific surface area and fine granularity, so that the volatilization capacity and corrosion inhibition performance of the amino acid type gas phase corrosion inhibitor are improved.

The invention provides an emulsified oil-displacing agent and a method for improving the recovery efficiency of a heavy oil reservoir. The emulsified oil-displacing agent comprises water-soluble carbonate, choline chloride and urea in a molar ratio of 1: 2: 1. The method for improving the recovery efficiency comprises the steps that gas 0.1-0.2 PV is injected into a reservoir through an injection well in an injection-production well pattern of a target oil reservoir; after gas injection is completed, the 0.05-0.2 PV emulsified oil-displacing agent is continuously injected into the reservoir stratum through the injection well, and the concentration of the total mass of the water-soluble carbonate, choline chloride and urea is not lower than 0.5% on the basis that the total mass of the oil-displacing agent is 100%; and after injection of the emulsified oil-displacing agent is completed, hot water with the temperature of 50-80 DEG C and the pressure of 0.1-0.3 PV is continuously injected into the reservoir stratum through the injection well. According to the technical scheme, in-situ profile control and displacement of the remaining oil of the heavy oil reservoir entering the later stage of steam flooding can be effectively achieved, the longitudinal swept volume is increased, and the recovery efficiency is improved.