40 results about "Polymer engineering" patented technology

The invention discloses an assembling-typed clean operating room operated in dry condition and the air treatment method thereof. The assembling-typed clean operating room comprises side walls, a roof plate and a fresh air unit. A static pressure box is arranged above the roof plate and is connected with an air supply pipeline of the fresh air unit; a wind returning pipeline is connected between the lower part of the side wall and the static pressure box, and the wind returning pipeline is provided with a circulating fan or the static pressure box is provided with an FFU; the side walls, the roof plate, the static pressure box, the FFU, the circulating fan, the wind returning pipeline, the fresh air unit and the air supply pipeline of the fresh air unit are connected with each other in a detachable manner. The circulating fan or the FFU operates in dry condition. The whole system has safety, high efficiency and simple structure. The assembling-typed clean operating room can be obtained by assembling polymer engineering plastics or color steel plates, Syntex plates, nanometer cloth and PVC strong material and the like together and the fast on-site assembling can be realized. The invention ensures that the exiting operating room can become a product instead of an engineering project, leading to standardization, normalization, speed-up and energy conservation of manufacturing and assembling.

The invention relates to the field of modification of polymer engineering plastic, in particular to a method for preparing a hydrolysis-resistant glass fiber reinforced polyamide 66 (PA66) composite material. The composite material is characterized by consisting of the following materials in part by weight: 55 to 65 parts of PA66, 0.1 to 2 parts of hydrolysis-resistant agent, 30 to 40 parts of glass fibers, 1 to 3 parts of nanoparticles, 0.5 to 2 parts of antioxidant and 0.5 to 2 parts of lubricating agent. According to the preparation method, extrusion granulation is performed by a double screw extruder. By introducing the high-efficiency hydrolysis-resistant agent, the hydrolysis resistance of the PA66 is improved, and the physical and mechanical properties of the glass fiber reinforced PA66 in a high-humidity environment are enhanced; and meanwhile, by introducing the nanoparticles, the mechanical properties such as tensile strength, hardness and the like of the PA66 are further enhanced, the wear resistance of the PA66 is enhanced, and the application range of the PA66 is further expanded.

The invention belongs to the technical field of polymer engineering materials and relates to magnesium carbonate modified halogen-free fire protection engineering plastic and a preparation method thereof. The engineering plastic comprises the following components in percentage by mass: 1 to 20 percent of nano magnesium carbonate, 1 to 15 percent of aids, 1 to 15 percent of synthetic resin and the balance of plastic. The nano magnesium carbonate is added into a fire resistant agent and the mechanical property of engineering plastic is not greatly influenced, and in addition, the added nano magnesium carbonate can also improve the rigidity and heat resistance of engineering plastic. A magnesium carbonate fire retardant is obtained by performing in-situ dispersion polymerization on the nano magnesium carbonate and alkyd resin. As the alkyd resin is compatible with nano magnesium carbonate, the dispersibility of nano magnesium carbonate in a polymer is improved and the alkyd resin is compatible with the synthetic resin.

Belonging to the field of polymer engineering, the invention in particular relates to a recovery method of by-product sodium chloride in the production process of polyphenylene sulfide (PPS). The method includes the steps of: filtering the mixed slurry obtained at the end of polymerization reaction to obtain a filter cake and a by-product slurry, washing the filter cake with deionized water to obtain washing liquid and a PPS wet material, mixing the washing liquid and the by-product slurry, then carrying out filtering, acidification, aeration, filtration, neutralization, dehydration and refiltering, thus obtaining the byproduct sodium chloride. The sodium chloride recovered by the method provided by the invention has purity of not less than 99.55wt%, and a low molecular polymer content of less than or equal to 0.3wt%, thus meeting the quality requirements of industrial salt. Therefore, no waste salt is generated in the production process of PPS.

Embodiments of the invention provide at least one polymer covalently conjugated to an esterase. The at least one polymer includes a plurality of oxime functional groups.

The invention belongs to the technical field of polymer engineering plastics, in particular relates to a polybutylene terephthalate / glass fiber composite and a preparation method thereof and aims to solve the technical problems that the toughness, the processability and the appearance quality of the polybutylene terephthalate are poor due to the addition of a glass fiber. According to the technical scheme of the invention, the polybutylene terephthalate / glass fiber composite with high strength and high toughness is provided, the polybutylene terephthalate / glass fiber composite is prepared by uniformly mixing intermediates A and B according to the mass ratio of 1:1, and carrying out extrusion pelletization. The polybutylene terephthalate / glass fiber composite has stronger strength, stronger toughness, good processability and good appearance effect and can be widely applied to various fields of the electronic field, the automobile field, the household appliance field and the like.

The present invention relates to new bi-functional and polyfunctional bis-dioxolanes and bis-dioxanes. The present inventors have established that the bis-dioxolanes and bis-dioxanes of the invention are highly advantageous as building blocks, cross-linking and / or coupling agents in polymer engineering. They can be derived from biomass sources in a highly efficient manner. The production of the present bis-dioxolanes and bis-dioxanes from biomass has the particular advantage that it facilitates the introduction of desired functionality in a highly flexible manner. Hence, the present invention provides novel bi- or polyfunctional bis-dioxolanes and bis-dioxanes, their production from renewable (biomass) sources, as well as their use in the engineering of polymers.

The invention relates to the field of stress measurement of polymer materials and discloses a method of detecting the residual principal stress of a polymer product. The method adopts a two-dimensional X-ray diffraction method to quantitatively detect the residual principal stress of the polymer product, the polymer material adopts a crystalline region and an amorphous region, and in the presenceof the residual stress, the crystalline region and the amorphous region have the same strain. The method provided in the invention succeeds in application of the two-dimensional X-ray diffraction method to the residual principal stress detection on a polymer engineering material, the limitations that the traditional two-dimensional X-ray diffraction method can only be applied to detection on the residual stress of a polycrystalline metal material are broken, and the detection method is simple and controllable, the application range is wide, the detection errors are small, and the application prospect is broad.

The present invention proposes a novel method for quickly decomposing sedimentary rare earth ores for specific sedimentary clay-type rare earth ores in the Bijie-Liupanshui area of ​​Guizhou, that is, high-strength polyphenylene polymer engineering plastics are used as the material for the inner tank for digestion. NH with high boiling point 4 HF 2 Instead of HF, use NH 4 HF 2 and HNO 3 Perform a high-pressure closed digestion program at 240-250 °C. Digest solution with 0.25~0.5mL H 2 SO 4 Catching acid to destroy rare earth fluorides, using 5% HCl~5% tartaric acid as the dissolution medium, realized the rapid and complete decomposition of rare earth, Zr, and Nb in sedimentary rare earth ores. The decomposition effect of this method on zircon and rutile in sedimentary rare earth ores in Bijie-Liupanshui area, Guizhou Province is equivalent to that of the closed polytetrafluoroethylene digestion method, but the temperature used is higher, the pressure is higher, and the time is shortened by nearly 2 / 3, which reflects It has the advantages of fast, efficient, green and energy saving.