3results about How to "Improve structural regularity" patented technology

The application belongs to the technical field of high polymer materials, and particularly relates to an anti-static polycarbonate composite carrier tape and a preparation method thereof. The application provides an anti-static polycarbonate composite carrier tape which is composed of the following components in parts by weight: 70-80 parts of silicon-containing polycarbonate, 8-10 parts of carbon black material, 6-8 parts of polyethylene terephthalate, 4-6 parts of polyolefin, 0.4-0.6 parts of antioxidant, and 0.4-0.6 parts of heat stabilizer. The preparation method of the silicon-containing polycarbonate comprises the following steps: first, performing a temperature rising reaction by taking hydrogen-terminated silicone oil and eugenol as raw materials to obtain phenolic hydroxyl silicone oil; and then mixing diphenyl carbonate, bisphenol A and the phenolic hydroxyl silicone oil to perform a copolymerization reaction to obtain the silicon-containing polycarbonate. The composite carrier tape can achieve good anti-static effect, and can also improve the thermal deformation temperature and mechanical properties of the material.

The method for preparing polyoxalate by ring-opening polymerization of cyclic oxalate monomers and cyclic oligomers thereof disclosed by the application is that at least one of the cyclic oxalate monomers and the cyclic oligomers thereof, or a blend of at least one of the cyclic oxalate monomers and the cyclic oligomers thereof and at least one of cyclic lactone, cyclic lactide and cyclic carbonate, is subjected to bulk ring-opening polymerization or solution ring-opening polymerization under the action of a catalyst and an initiator to obtain polyoxalate and its copolymer. Since the application adopts ring-opening polymerization to prepare polyoxalate, not only the problems of low esterification polycondensation efficiency and poor polymerization controllability are avoided, but also the side reactions of alpha-keto acid decarboxylation and terminal hydroxyl group etherification in the esterification polycondensation process are avoided, so that the polyoxalate obtained has controllable polymerization degree / molecular weight, high structural regularity and clear end group structure, and further has higher melting point and crystallization temperature and is white, and at the same time, a new way for preparing polyoxalate is provided.

This invention relates to the field of electrochemical energy storage materials and lithium metal battery technology, specifically to an in-situ polymerized solid electrolyte, its preparation method and application, and lithium metal batteries. This in-situ polymerized solid electrolyte is prepared by heating a ring-opening polymerization reaction using 1,3-dioxolane and 1,1,1-trifluoro-2,3-epoxypropane as reactants, sodium thiosulfate as an initiator, and lithium salt and plasticizer fluoroethylene carbonate as a precursor solution. This electrolyte possesses numerous amorphous regions, which is beneficial for ion transport, enabling the formation of a self-supporting dense structure. It also ensures close contact with the electrode, resulting in a pure interface that effectively reduces interfacial impedance and avoids side reactions at the electrode interface. Furthermore, it enhances oxidation resistance, broadens the electrochemical window, and inhibits dendrite growth. While achieving good mechanical properties, it also improves the cycle stability and safety performance of the battery. It has excellent application prospects in lithium metal batteries, lithium-ion batteries, solid-state energy storage systems, or flexible electronic devices.