3 results about "Diphenyl disulfide" patented technology

The application provides a high-heat-resistance self-repairing epoxy resin based on a dynamic disulfide bond, a preparation method thereof, a fiber-reinforced composite material and application, and belongs to the technical field of intelligent composite materials. The preparation method comprises the following steps: S1. mixing bisphenol F diglycidyl ether and 4,4'-methylene di(N,N-diglycidyl aniline), heating and stirring until the mixture is uniform to obtain a mixed epoxy base; S2. mixing the mixed epoxy base with a curing agent 4,4'-diamino diphenyl disulfide, heating and stirring until the mixture is uniform, and then performing vacuum degassing treatment to obtain a prepolymer; and S3. performing a stepwise temperature rising curing reaction on the prepolymer to obtain the high-heat-resistance self-repairing epoxy resin. The high-heat-resistance self-repairing epoxy resin prepared by the application not only retains the inherent high strength and process stability of high-performance epoxy resins, but also is endowed with excellent intelligent damage repair function, the Tg of the high-heat-resistance self-repairing epoxy resin is much higher than that of conventional self-repairing materials, and the mechanical properties, heat resistance and high-efficiency self-repairing capability are simultaneously considered.

The present application relates to a preparation method of high-efficiency synthesis of polyphenylene sulfide, and belongs to the field of oxidative polymerization, and mainly solves the technical problem of providing a reaction method with less side reaction, low requirement for equipment, short reaction flow, and simple post-treatment. The method mainly uses diphenyl disulfide as a reactant, dichloromethane as a reaction solvent, a mixture of manganese and Lewis acid as a catalyst for the reaction, and air as an oxidizing agent for the reaction under the above conditions, so that the yield of the product reaches 99%, the chemical stability of the product is high, the mechanical property is also good, and the purity is relatively high. The present application uses air as an oxidizing agent and is under normal pressure, has a simple process flow, mild reaction conditions, and the selection of the catalyst considers the process recovery design, that is, after the catalyst is used, it can be recovered for the next batch of synthesis of polyphenylene sulfide reaction after simple treatment, and has great industrial application value.

The application discloses a self-repairing polyurethane phase change material based on a polyethylene glycol / hexamethylene diisocyanate trimer dynamic semi-interpenetrating network and a preparation method thereof. The method comprises the following steps: in-situ constructing a dynamic cross-linked polyurethane network matrix with solid-solid phase change capacity by using polyethylene glycol with a number average molecular weight of 2000, hexamethylene diisocyanate trimer and 2,2'-diamino diphenyl disulfide, introducing 30wt.%-70wt.% of cetyl alcohol in the total mass of the material into the network matrix system and solidifying to obtain the phase change material; and the mass ratio of the polyethylene glycol and the cetyl alcohol is 1:0.43-1:2.33. In the material, the cetyl alcohol is physically inserted in the three-dimensional network space formed by the dynamic cross-linked polyurethane network in the form of a non-covalent dispersed phase, and the PEG soft segment in the dynamic cross-linked polyurethane network matrix and the cetyl alcohol both retain reversible crystallization capacity, thereby forming a dynamic semi-interpenetrating network system in which the network matrix phase and the dispersed phase jointly participate in heat storage. Compared with the existing polyurethane-based phase change material which mainly relies on a long-chain fatty alcohol dispersed phase to store heat, the material has good heat storage capacity, zero leakage performance, shape stability and thermal stimulus self-repairing performance, and can be applied to the fields of heat management and heat storage.