436 results about "Glycidol" patented technology

The invention relates to a degradable epoxy resin composite material with an adjustable curing speed, and a preparation method and a mild total recycling method thereof. Existing degradable epoxy resin has the problems of high cost, harsh degradation conditions and the like, and is difficult to meet the requirements of different application scenes on curing speed and temperature at the same time. The invention provides an epoxy resin composite material which comprises curing agent components (an epoxy resin amine curing agent and an ester-containing polythiol curing agent) and epoxy resin components (glycidyl ether epoxy resin, glycidyl amine epoxy resin and glycidyl ester epoxy resin). The cured composite material can be fully recycled through catalytic degradation under mild conditions by using a lewis acid and an amino group breaking ester bond mechanism, and the degradation product can be directly used as a curing agent, a toughening agent and a chain extender. The epoxy resin composite material disclosed by the invention not only has adjustable curing speed and high use performance, but also realizes environmental friendliness and resource recycling, and provides a new solution for sustainable development of epoxy resin.

The invention discloses a high-molecular-weight phosphamide aggregate flame retardant and a preparation method thereof.The method comprises the steps that phosphoryl dichloride compounds and piperazine anhydrous serve as raw materials, an amino-terminated phosphamide polymer is synthesized through a condensation reaction, and the phosphamide polymer flame retardant is obtained. The high-molecular-weight phosphamide aggregate flame retardant is obtained through a ring-opening reaction of amino-terminated groups and epoxy groups between the high-molecular-weight phosphamide aggregate flame retardant and triglycidyl isocyanurate. Compared with an existing small-molecule flame retardant, the flame retardant is higher in thermal stability, better in compatibility with a high polymer material matrix, not prone to migration and capable of achieving synergistic flame retardance due to the fact that the flame retardant contains phosphorus and nitrogen structural units at the same time, and when the prepared flame retardant is added into TPU, PC, EP, PET and other transparent matrixes, the flame retardance is improved. The flame retardant property of the transparent base material can be improved, and meanwhile, good mechanical property and high light transmittance can be kept. In addition, the preparation method disclosed by the invention is simple and easy to control, high in yield, wide in source of required raw materials, easy for industrial production and wide in industrial application prospect.

The present invention belongs to the technical field of waterborne polyurethane, and specifically relates to a method for synthesizing an internally cross-linked cationic waterborne polyurethane emulsion. The method comprises the following steps: 1) reacting glycidol and diethanolamine until the infrared spectrum analysis shows that the glycidol and diethanolamine are at 908 cm ‑1 and 845cm ‑1 The epoxy groups disappear, the reaction is stopped, and the product EDEOA, a tertiary amino crosslinking agent, is obtained as a light yellow viscous liquid; 2) polyol and diisocyanate are added to a reactor and heated and kept warm under stirring for reaction; 3) solvent, tertiary amino crosslinking agent, tertiary amino small molecule alcohol amine chain extender, solvent and catalyst are then added to react to obtain a polyurethane intermediate; 4) a neutralizing agent is then added to the reaction system for neutralization reaction, and the temperature is lowered after the reaction is completed; 5) water is added to quickly disperse the mixture uniformly, and the solvent is removed in vacuo to obtain a waterborne polyurethane emulsion. The present invention mainly solves the technical problems existing in the synthesis of cationic waterborne polyurethanes, such as poor emulsion stability, low film mechanical properties, and poor water and solvent resistance.

The invention relates to the technical field of high polymer materials, in particular to polyolefin thermoplastic elastomer / silicone rubber thermoplastic vulcanized rubber as well as a preparation method and application thereof. According to the invention, the polyolefin thermoplastic elastomer grafted silane or / and the polyolefin thermoplastic elastomer grafted maleic anhydride / glycidyl ester terpolymer, the platinum catalyst and the inhibitor are added during blending and dynamic vulcanization of the silicone rubber and the polyolefin thermoplastic elastomer to regulate and control the dynamic vulcanization process; therefore, the thermoplastic vulcanized rubber with ideal mechanical properties is obtained. The polyolefin thermoplastic elastomer / silicone rubber thermoplastic vulcanizate provided by the invention is high in strength, good in elasticity, good in toughness, smooth in surface, fine in phase state, good in somatosensory compatibility and good in skin touch, and also has good stain resistance, sweat resistance, yellowing resistance and ultraviolet resistance.

The invention relates to the technical field of preparation of copper-clad plates, and discloses a preparation method of a phosphorus-containing flame-retardant halogen-free copper-clad plate, which comprises the following steps: uniformly stirring and mixing bisphenol A type epoxy resin, linear phenolic resin, phosphorus-containing tetraglycidyl ester and the like, smearing the mixture on E-glass fabric, baking to obtain prepregs, overlapping eight prepregs, coating copper foils on the two surfaces, and drying to obtain the phosphorus-containing flame-retardant halogen-free copper-clad plate. According to the preparation method, bisphenol A type epoxy resin is taken as matrix resin, linear phenolic resin is taken as a curing agent, phosphorus-containing tetraglycidyl ester is added, flame-retardant elements and a heat-resistant structure contained in the phosphorus-containing tetraglycidyl ester are utilized, the flame-retardant halogen-free copper-clad plate is obtained, and the flame-retardant halogen-free copper-clad plate is obtained. The flame retardant property, the heat resistance and the mechanical property of the copper-clad plate material are improved.

The invention discloses waterborne epoxy resin, a coating and a preparation method and application thereof, and relates to the technical field of high polymer materials. The water-borne epoxy resin has a specific structure, the structure contains units of glycidol, bisphenol A and fluorophthalic anhydride, the water-borne epoxy resin does not contain chloride ions and can be used for preparing low-chlorine, low-sulfur and low-lead water-borne epoxy coatings, the corrosion resistance of coatings formed by the water-borne epoxy coatings is improved, the service life of the coatings formed by the water-borne epoxy coatings is prolonged, and the service life of the coatings is prolonged. The obtained coating is improved in acid and alkali resistance, water resistance and salt spray resistance, has good adhesive force, is suitable for preparing the coating for stainless steel, and can effectively prevent free chloride ions from damaging a stainless steel passive film protective layer.

The invention relates to the technical field of chemical detection, in particular to a sample pretreatment method and a GC-MS (Gas Chromatography-Mass Spectrometer) method for simultaneously detecting glycidol and monochloropropanol in heated cigarette aerosol. The sample pretreatment method for simultaneously detecting the glycidol and the monochloropropanol in the heated cigarette aerosol comprises the following steps: capturing particulate matters in the heated cigarette aerosol; mixing the trapping material with ethyl acetate and an internal standard substance, extracting to obtain an extracting solution, and diluting with n-hexane; adding heptafluorobutyrylimidazole to perform derivatization reaction, washing with water after the derivatization reaction is completed, and drying to obtain a solution to be detected. According to the present invention, ethyl acetate is adopted for extraction, and detection analysis can be performed through dilution, HFBI derivatization, water washing and drying, such that the sample pretreatment step is substantially simplified, and the analysis sensitivity and the accuracy of the simultaneous detection of the three compounds such as the glycidyl, the 3-chloro-1, 2-propylene glycol and the 2-chloro-1, 2-propylene glycol can be easily improved.

The invention belongs to the field of chemical engineering, and relates to a process device and method for continuously synthesizing glycidyl (3-chloro-1, 2-propylene glycol and sodium hydroxide (hereinafter referred to as NaOH) as raw materials). The device comprises a raw material feeding pump, a heat exchanger, a micro-reactor, a delay tube reactor 1, a neutralization micro-reactor and a delay tube reactor 2 which are sequentially in fluid communication through pipelines, the heat exchangers are divided into two groups, one group is used for heat exchange of 3-chloro-1, 2-propylene glycol solution, and the other group is used for heat exchange of alkaline solution. According to the method, a 3-chloro-1, 2-propylene glycol solution and a sodium hydroxide solution (NaOH) are adopted as raw materials, glycidol is continuously prepared through a microchannel reactor, on the basis, an acid-base neutralization reaction can be carried out in situ according to needs to remove redundant alkali, redundant heat generated by the acid-base neutralization reaction is absorbed through a low-temperature material, and energy consumption is reduced; the product is analyzed by gas chromatography, and the generated glycidol does not have hydrolysates or auto-polymerization products, so that the product selectivity is higher.

Challenges are to provide an epoxy resin composition for RTM which achieves both viscosity stability at the time of injection and stiffness at the time of demolding, and a cured resin of which is superior in balance among elastic modulus under wet and heat conditions, heat resistance under wet conditions, and fracture toughness, and to provide a large fiber-reinforced composite material having a high Vf and including the epoxy resin composition. Provided is an epoxy resin composition for RTM including an epoxy resin and a curing agent component, containing the following components [A] and [C] as the epoxy resin, containing the component [B] as the curing agent component, and containing 50 to 85 parts by mass of the component [A] in 100 parts by mass of the epoxy resin, [A] Tetrafunctional glycidyl amine type epoxy resin [B] a curing agent that is liquid at 150°C [C] Aniline type epoxy resin represented by Formula (I): (In Formula (I), R1 and R2 each represent at least one selected from the group consisting of aliphatic hydrocarbon groups having a carbon number of 1 to 4; n is an integer of 0 to 4; and m is an integer of 0 to 5; when n or m is 2 or more, R1 and R2 each may be the same or different at each occurrence; X represents -O- or -S-).

The invention discloses modified epoxy resin suitable for oven forming and a preparation method and application thereof, and belongs to the technical field of resin-based composite materials. The modified epoxy resin comprises the following raw materials in parts by mass: 45-60 parts of bisphenol A epoxy resin; 10 to 15 parts of glycidyl amine tetrafunctional epoxy resin; 15 to 20 parts of glycidyl ester type trifunctional epoxy resin; 10 to 16 parts of a toughening agent; 40 to 45 parts of 4, 4 '-diaminodiphenyl sulfone; the toughening agent is thermoplastic phenolphthalein polyaryletherketone resin or thermoplastic phenolphthalein polyethersulfone resin, and the obtained modified epoxy resin has similar viscosity-temperature characteristics, highest exothermic temperature and relatively long gelation time as MTM45-1 oven molding resin applied in airbus certification, and is suitable for being used in preparation of oven molding prepregs. And the obtained oven molded prepreg has good stability, and the difference of products in each batch is small.

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The invention relates to the technical field of high polymer materials and protective coatings, and discloses a single-layer anti-ultraviolet heavy-duty powder coating as well as a preparation method and application thereof. The preparation method of the single-layer anti-ultraviolet heavy anti-corrosion powder coating comprises the following steps: adding carboxyl polyester resin, triglycidyl isocyanurate, modified nano silicon dioxide, modified chitosan, 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol, bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, flaky aluminum powder, zinc phosphate, BYK-3920, 2-hydroxy-1, 2, 4-triazole-2-yl)-1, 3, 4-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5- The preparation method comprises the following steps: stirring and mixing 2, 2-diphenylethanone and gamma-aminopropyltriethoxysilane at room temperature at 300-350rpm for 10-15min to obtain a mixture, extruding the mixture through a double-screw extruder at the extrusion temperature of 110-120 DEG C and the screw rotation speed of 450-500rpm, and grinding to obtain the single-layer anti-ultraviolet heavy-duty anticorrosive powder coating. The single-layer anti-ultraviolet heavy anti-corrosion powder coating can be applied to metal base material protection. The coating prepared by the invention has good ultraviolet resistance and corrosion resistance.

The invention discloses a high-strength self-degradable gel temporary plugging agent and a preparation method thereof, and relates to the technical field of oil-gas field development. The temporary plugging agent is prepared by the following steps: firstly, reacting a diprimary amine compound with unsaturated glycidyl to prepare a multi-arm cross-linking agent, then reacting an acrylamide monomer, an acidic monomer, a rigid monomer and a 2-methacryloyloxyethyl phosphorylcholine monomer under the action of the multi-arm cross-linking agent and an initiator, and after the reaction is finished, crushing, drying and granulating to obtain the temporary plugging agent. The high-strength self-degradation gel temporary plugging agent prepared by the invention not only has relatively high strength, but also can be self-degraded, and the permeability recovery rate of a reservoir after degradation is relatively high, so that the influence on the reservoir is relatively small.

The invention provides a preparation method of a single-ended vinyl hyperbranched polyether macromonomer, which can be applied to the technical field of hyperbranched polyether synthesis. The method comprises the following steps: carrying out ring-opening polymerization reaction on any one of an epoxy group-containing vinyl monomer, a hydroxyl group-containing vinyl monomer or a carboxyl group-containing vinyl monomer and glycidol in the presence of a catalyst and a polymerization inhibitor to form the single-ended vinyl hyperbranched polyether macromonomer with an amino group, ester group or ether group structure. The invention also provides a single-ended vinyl hyperbranched polyether macromonomer product.

The invention provides a high-flame-retardant burnthrough-resistant PC alloy and a preparation method thereof. The PC alloy comprises the following components: branched PC resin with a special blocking rate, 4-10 parts of aryl p-toluenesulfonate and glycidyl ester, wherein the blocking rate of the branched PC resin is 85-95%. The heat resistance, melt strength and burnthrough resistance of the PC alloy are remarkably improved, the heat deformation temperature is increased to 132 DEG C from 122 DEG C, the needle flame S.2 burnthrough time is increased to 150 s or above from 15 s, high flame retardance and burnthrough resistance of a PC product are achieved, and meanwhile the original mechanical performance and thermal performance of PC resin are not affected.

The invention provides a special fiber material and a preparation method thereof, and belongs to the technical field of polymer composites.The preparation method comprises the following steps that cellulose and an ethanol solution are mixed, polyvinyl alcohol and a 3-glycidoxypropyltrimethoxysilane solution are added, the pH is adjusted to be acidic, heating, suction filtration and drying are conducted, and modified cellulose is obtained; mixing expanded graphite, deionized water, ammonium persulfate and dilute sulphuric acid, heating, cooling, dropwise adding amino polyethylene glycol silane, heating, washing and drying to obtain modified expanded graphite; the preparation method comprises the following steps: mixing modified cellulose, modified expanded graphite, phosphate montmorillonite, 3-(methacryloyloxy) propyltrimethoxysilane, bisphenol A diglycidyl ether and 2-methylimidazole, stirring, heating, defoaming, and carrying out two-stage constant-temperature treatment to obtain the special fiber material. The special fiber material disclosed by the invention has good flame retardance, mechanical strength, water resistance and filtering performance, and can be applied to various organic composite boards, filter membranes and the like with high quality requirements.

The invention provides solvent-resistant polyurethane resin, which is prepared from the following substances in parts by mass: 60 to 90 parts of diol, 15 to 25 parts of diisocyanate, 3 to 8 parts of auxiliaries, 1.5 to 3 parts of 1, 4-bis (2-hydroxyethyl) piperazine, 2 to 4 parts of 2, 2-dimethylolpropionic acid, 0.5 to 2 parts of catalysts, 0 to 3 parts of 4, 4 '-dithiodibenzoic acid diglycidyl ester and 0 to 2 parts of sodium alginate. Meanwhile, the invention further provides a simple preparation method, and the prepared solvent-resistant polyurethane resin is low in soaking swelling rate, good in solvent resistance, high in tensile strength and simple in preparation process and can be applied to the industries such as chemical anticorrosive paint, printing ink and electronic packaging.

The application relates to a preparation method and application of a hard carbon negative electrode material, and comprises the following steps: 1) dissolving an epoxy resin derivative and an amine catalyst in an organic solvent to obtain a mixture, ultrasonically dispersing alkali-activated biomass powder in the mixture, and performing reaction by increasing temperature to obtain modified biomass powder; the epoxy resin derivative comprises phenolic epoxy resin and isocyanuric acid triglycidyl ester; 2) carbonizing the modified biomass powder. The reaction in step 1) is used for reinforcing the easily-oxidized and weakly-connected structure on the alkali-activated biomass powder, so that the modified biomass powder with enhanced crosslinking degree and a complex three-dimensional crosslinking structure is obtained; and the modified biomass powder is carbonized in step 2). The hard carbon negative electrode material obtained by the method makes the battery have excellent cycle stability.

The invention provides a preparation method of nitrogen-doped novolac epoxy resin-based hard carbon, which comprises the following steps: polymerizing a phenol monomer and an aldehyde monomer in the presence of a basic catalyst, uniformly mixing with glycidyl amine epoxy resin, curing, crushing and carbonizing to obtain a nitrogen-doped hard carbon material. Due to effective nitrogen doping, the sodium ion battery assembled by using the hard carbon material has the characteristics of high reversible specific capacity and high rate performance; the glycidyl amine epoxy resin is high in epoxy group content, can be cured without adding a curing agent after being mixed with the phenolic resin, and can anchor free phenol in the phenolic resin, so that the carbon yield is increased. The preparation method of the nitrogen-doped novolac epoxy resin-based hard carbon provided by the invention has the advantages of simple process, high carbonization yield and low cost.

The invention discloses a single-chain alkylamino glycerol compound, a preparation method and application. The structural general formula of the single-chain alkylamino glycerol compound is R-NH-CH2-CHOH-CH2OH, the single-chain alkylamino glycerol compound is used for preventing and controlling peach monilinia and / or botryosphaeria dothidea, and R is a C8-C18 straight chain or branched chain and saturated or unsaturated alkyl. The single-chain alkylamino glycerol compound provided by the invention can be prepared by reacting glycidol and alkylamine under mild conditions, has a remarkable inhibition effect on peach monilinia and botryosphaeria dothidea, and can induce fungal membrane rupture, anti-oxidation system imbalance and lipid peroxidation, so that fungus killing is realized. The device can be widely used for fruit and vegetable postharvest preservation, orchard spraying and green pesticide development.

The invention discloses a coumarin-based bio-based epoxy resin monomer and a preparation method and application thereof, and the structure of the monomer is DPE, DCE and DHE. The monomer takes dihydrocoumarin and biomass amine compounds (including putrescine, cadaverine and 1, 6-hexamethylenediamine) as raw materials, biomass bisphenol DP, DC and DH are prepared through a simple ring-opening reaction, and then the monomer is prepared through a glycidyl reaction. A bisamide structure is innovatively introduced into the epoxy resin monomer, so that the epoxy resin monomer has the advantages of simple and convenient synthesis process, high yield, easily available raw materials, good biological safety and the like, and the performance is superior to that of traditional petroleum-based epoxy resin. The bio-based epoxy resin prepared based on the monomer shows a novel molecular structure and excellent mechanical properties and heat resistance.

The application discloses a degradable rosin-based epoxy foam and a preparation method and application thereof, and belongs to the technical field of shielding materials, and comprises the following steps: stirring and uniformly mixing propylenediamine-based latent foaming agent, propylenediamine, propylene abietic acid glycidyl ester and 1,3-bis(3-glycidyloxypropyl)-1,1,3,3-tetramethyldisiloxane, and obtaining the degradable rosin-based epoxy foam through reaction.The foaming agent used in the application is rapidly decomposed under heating conditions to release carbon dioxide and the curing agent propylenediamine, and the preparation is simple, environment-friendly and residue-free; the prepared epoxy foam is easy to degrade, excellent in electromagnetic shielding and joule heating performance, and has a wide application prospect in the fields of military equipment, aerospace and wearable electronic devices.

The invention belongs to the technical field of high polymer materials, and particularly discloses glycidyl ester type epoxy resin and a preparation method thereof, the preparation method comprises the following steps: (1) melting polymerized rosin, adding a first catalyst, maleic anhydride, methacrylic acid and hydroxyl-terminated hyperbranched polyester, and reacting to obtain a precursor; and (2) adding bisphenol A epoxy resin and a second catalyst into the precursor, and reacting to obtain the glycidyl ester type epoxy resin. According to the invention, maleic anhydride, methacrylic acid, hydroxyl-terminated hyperbranched polyester and bisphenol A epoxy resin are combined; the three-dimensional synergistic enhancement of rigidity-flexibility-branching is realized, the proportion of rigid and flexible chain segments in a molecular structure is effectively coordinated, reaction active sites and crosslinking density are effectively improved, more reaction active sites and reaction activity are provided, and the mechanical property of a product is effectively improved.

An inorganic quick-setting filling material and its preparation method, including material A and material B. Material A is made from the following components by weight: 25-35 parts of sulfoaluminate cement, 30-40 parts of blast furnace slag, 10-20 parts of waste gypsum, 1-3 parts of recycled alumina fiber, 5-10 parts of volcanic ash, 0.8-1.2 parts of (3,6-diaminoacridin-9-yl)boronic acid; Material B is made from the following raw materials by weight: 4-6 parts of functional water-soluble resin, 1-2 parts of 3-(N-morpholino)-2-hydroxypropanesulfonate sodium, 0.5-0.8 parts of sucralose, 0.1-1 part of sodium lignosulfonate, 0.8-1.2 parts of 1,3,5-triglycidyl-S-triazine trione, 0.1-0.5 parts of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt. This material has good quick-setting effect, high compressive strength, excellent flame retardant and antistatic properties, and long service life.

The invention relates to the technical field of paper wet strength agents, in particular to an environment-friendly wet strength agent and a preparation method thereof. The preparation method of the wet strength agent comprises the following steps: under the action of a catalyst, succinic acid, maleic acid and triethylene tetramine react to obtain an unsaturated polyamide polyamine prepolymer; adding water into the unsaturated polyamide polyamine prepolymer to adjust the solid content, heating, adding double-bond-containing nanocellulose, tea saponin, glycidyl acrylate and an initiator, and reacting to obtain an intermediate emulsion; cooling the intermediate emulsion to room temperature, adding epichlorohydrin to react for 0.5-3 hours, heating to 50-75 DEG C, continuing to react for 1-5 hours, cooling reaction liquid to 25-30 DEG C, adding glyoxal to react for 0.5-1 hour, adjusting the pH value of the reaction liquid after the reaction is completed, and adding water to adjust the solid content, thereby obtaining the product. The preparation method is simple in process, and the prepared wet strength agent can reduce organic chlorine residues.

The invention relates to automobile film surface protection, and provides a scratch-resistant coating composition and a preparation method thereof. The composition is prepared from polymer resin containing an acrylate group, polysiloxane acrylate containing a hydrolyzable alkoxy silicon group, composite silane modified double-particle-size nano silicon dioxide, a photoinitiator, an organic silicon cross-linking agent and an auxiliary agent, wherein the nano silicon dioxide is composed of a small-particle-size group and a large-particle-size group; and gamma-methylacryloyloxypropyl silane and gamma-glycidoxypropyl silane are respectively grafted to the two monomers. A micro-thin transparent hard coating is formed on the surface of a polyester base material through staged ultraviolet curing and damp-heat curing, so that the coating has high surface hardness and abrasion resistance and excellent damp-heat aging adhesive force and whitening resistance while keeping high light transmittance and low haze.

The invention relates to the field of ceramic packaging materials, in particular to a packaging material for a high-voltage-resistant ceramic side wall and a preparation method of the packaging material. The packaging material is prepared from an epoxy-silica hybrid prepolymer, an aluminum oxide and silicon dioxide core-shell composite filler, methylhexahydrophthalic anhydride and 2-ethyl-4-methylimidazole, wherein the hybrid prepolymer is prepared by carrying out hydrolytic condensation on bisphenol A diglycidyl ether, hydroxyl-terminated PDMS (Polydimethylsiloxane) and 3-glycidoxypropyltrimethoxysilane; low viscosity and low volatile matter are realized; the core-shell filler takes aluminum oxide as a core and silicon dioxide as a shell, and a shell layer is grafted with epoxy silane so as to be chemically bonded with resin. And after curing, the power frequency short-time electrical strength of the packaging layer is greater than or equal to 20 kV / mm, the partial discharge initial voltage is greater than or equal to 3 kV, the volatile matter is less than or equal to 1.0 wt%, and the water content is less than or equal to 0.2 wt%.

This application discloses a harmonica tube and a preparation method thereof, a liquid cooling plate, a battery, and an electric apparatus, where a material of the harmonica tube includes a polyphenylene sulfide composition, and the polyphenylene sulfide composition includes a polyphenylene sulfide resin and a toughening agent; the toughening agent includes a copolymer of an olefin and a glycidyl ester. By providing the polyphenylene sulfide composition as the material for the harmonica tube, this application facilitates reducing issues such as material breakage or poor extrusion flow during extrusion molding, enabling the formed harmonica tube to exhibit excellent mechanical strength, deformation resistance, corrosion resistance, heat resistance, heat dissipation, and creep resistance, lowering the risk of cracking under pressure during use, and enhancing production capacity and product quality.

The adhesive composition contains a cationically polymerizable compound, a curing agent and conductive particles, and the cationically polymerizable compound contains an epoxy compound having a bisphenol structure and having a glycidyl group and a glycidoxy group. The adhesive film for circuit connection is provided with an adhesive layer formed by the adhesive composition.

The application discloses a self-emulsifying degradable carbon fiber sizing agent and a preparation method and application thereof. Raw materials of the self-emulsifying degradable carbon fiber sizing agent include the following components in parts by weight: diglycidyl ester epoxy resin monomer 20-30 parts, fatty amine 1-3 parts, amine curing agent 5-10 parts, sodium p-aminobenzenesulfonate 1-3 parts, water 15-20 parts and acetone 20-30 parts. The self-emulsifying degradable carbon fiber sizing agent can significantly improve wear resistance of the carbon fiber and interface performance of a composite material, and can be degraded under mild conditions, and the carbon fiber recovered has good performance.