Structure Of Resin Research Articles

Characterization and its curing behaviors of rigid phenolic foams based on cardanol

Cardanol/phenol-based foaming resol resins were prepared successfully by reacting formaldehyde with cardanol/phenol. Phenolic foams were fabricated with the above foaming resol resin and certain foaming agents. Two kinds of resol resins were characterized with Fourier transform infrared spectroscopy, rheological analysis and Scanning electron microscope. Meanwhile, the nonisothermal curing reactions of these resol resins were studied in detail using a dynamic Differential scanning calorimetry technique at a series of heating rates. The global activation energies of the reactions were determined with the Ozawa methods. The results indicated that the peak temperatures of the exothermic reactions and global activation energies of cardanol-based foaming resol resin were higher than those of phenol-based foaming resol resin, which indicated that the more complex molecular structure of cardanol-based foaming resol resin has a negative effect on the curing speed of resin.

Investigation of stress and tribological properties of dental composite materials using FEM

Performance of dental materials is influenced by the abrasion and wear qualities of the materials in contact. Despite major advancements in dental materials over the previous few decades, restorative materials, particularly composite resins, continue to wear out. Wear resistance is directly influenced by several composite resin composition and structure characteristics. The focus of this research is to explore the tribological properties of two commercially available dental composite materials using ANSYS software (Tetric N-Ceram and Z350 Dentin Shade). In the experiment, a simple tribo-system that complies with American Society for Testing and Materials (ASTM) G99 is utilised, consisting of a cylinder-shaped pin that can be deformed, rotating around a disc under wet conditions. A comparison of Z350 dentin shade and Tetric n Ceram simulations for the same load and simulation time revealed that the former material had greater wear resistance. Simulation results showed that as the stress on the pin increases, wear for both materials increases, which is supported by experiment data from the pin-on-disc tribometer setup.

Synthesis of octavinyl polyhedral oligomeric silsesquioxane (ovi‐POSS) based organic/inorganic hybrid resin microspheres for rapid and efficient oils absorption

AbstractIn this work, a hybrid nanocomposite of poly(styrene‐co‐butyl acrylate‐co‐dodecyl acrylate) and octavinyl polyhedral oligomeric silsesquioxane (ovi‐POSS) was synthesized by suspension polymerization and the composite resin was characterized by Fourier transform infrared, scanning electron microscopy energy‐dispersive spectrometer and thermal gravimetric analysis. The effects of ovi‐POSS content on the oil absorbency of hybrid composite resin were investigated. The results indicated that the maximum saturated oil absorption rate of sample PSBLA/ovi‐POSS‐1 with 1 wt% ovi‐POSS content toward four oils and organic solvents (toluene, xylene, gasoline, and diesel) are, respectively, 20.51, 18.56, 12.48, and 7.03 g g−1, and the process taken just about 5 min. The absorption kinetic model fitting proved that the adsorption behavior of the four oils on PSBLA/ovi‐POSS‐1 resin microspheres was dominated by the physical adsorption. Besides, PSBLA/ovi‐POSS‐1 has good oil retention rate (stay over 95% after centrifuging at 3000 rpm for 5 min) and reusability (for 12 times). These excellent oil absorption performances are attributed to the loose network structure of the composite resin. The rapid and efficient oils absorption properties give the composite resin potential practical applications in many areas.

Study of hybrid isocyanate and high‐mono‐hydroxymethyl urea content urea‐formaldehyde resins

AbstractBased on the difference in the reaction rate of different groups of urea‐formaldehyde resins and isocyanate resins, this study designed two different urea‐formaldehyde resins: a normal urea‐formaldehyde resin (UF) and one with high mono‐hydroxymethylurea content (UF*) to react with polymeric methylene diphenyl diisocyanate (pMDI) resin. The difference in mono‐ and di‐hydroxymethyl urea content between UF and UF* resins was analyzed by nuclear magnetic resonance (NMR) spectroscopy, and results showed that the mono‐hydroxymethyl urea content of the UF* resin was much higher than that of the conventional UF resin. The fourier transform infrared spectrometer (FTIR) analysis of differences between UF* and UF resin showed that the UF* process did not change the main structure of the conventional urea formaldehyde resin. Differential scanning calorimeter (DSC) analysis showed that the curing temperature of the hybrid UF*‐pMDI resin was reduced 27.3°C compared to that of the UF‐pMDI resin. When these hybrid resins were used to bond plywood respectively, test results showed that the UF*‐pMDI resin improved the dry and wet bonding strength by 2.6% and 3.9%, respectively, compared with the UF‐pMDI resin under the condition of hot pressing time (3 min) and temperature (140°C), meeting the requirement of Chinese standard of GB/T 9846–2015 for Class III board. This study provides a new path for further improving the performance and design of hybrid resins based on isocyanate and urea‐formaldehyde resin.

Synthesis, performance and structure characterization of glyoxal-monomethylolurea-melamine (G-MMU-M) co-condensed resin

In order to reduce the formaldehyde emission of formaldehyde-based wood adhesive from the source, it is aimed to develop a novel co-condensed resin of glyoxal-monomethylolurea-melamine (G-MMU-M). A series of G-MMU-M resins with various formulations of raw materials were successfully prepared. The basic properties and bonding performance of the G-MMU-M resins were determined. Furthermore, the structures of resins were characterized by FTIR, 13C NMR, XPS, and ESI-MS. The results show that the prepared G-MMU-M resin remains stable for 30 d, meanwhile, the dry and wet bonding strength of the plywoods bonded with the resins, solid content and viscosity are influenced greatly by the addition amount of melamine and MMU/G molar ratio. The G-MMU-M resins with MMU/G molar ratio of 0.9:1.0 and 8% melamine exhibit the highest dry and bonding strength of 1.98 MPa and 1.27 MPa, increased by 34% and 63%, respectively, in comparison with glyoxal-monomethylolurea (G-MMU) resin. In the G-MMU-M resins, there were four main oligomers including M—CH(—+CH-MMU)-O-MMU, M−CH(—CH2OH)-MMU-O-MMU, M—CH(—OH)—+CH-MMU-O-MMU, and M—CH(—+CH-MMU)-MMU-p-G.

Development and Evaluation of a Novel Sulfonated Phenol-Formaldehyde Resin with High Dispersion Stability.

Sulfonated phenol-formaldehyde (SPF) resin used as a cross-linker for petroleum reservoir conformance control was synthesized under alkaline conditions. The reaction process of SPF resin was evaluated by measuring the solution's viscosity with respect to phenol-formaldehyde (PF) resin. The molecular structure of SPF resin was characterized by both FTIR and HPLC-MS/MS. The influence of the formaldehyde/phenol molar ratio (F/P) and the sodium formaldehyde sulfoxylate/phenol molar ratio (S/P) on the properties of SPF were analyzed in terms of the storage time, coagulation value, molecular size, and zeta potential. The results indicate that the presence of formaldehyde sodium bisulfite could slow down condensation reaction. Phenol rings were connected by methylene bridges in the position of o-p, and sulfonated SPF resin molecules all had one sulfonate group on the oligomer structure. The storage time decreased from 87 to 6 days, and the zeta potential decreased from -3.02 to -7.70 mV with the increase in F/P (1.2-2.0). Meanwhile, the sedimentation value and the diameter increased from 3.291 × 104 to 5.045 × 104 mg/L and from 2.7 to 5.3 nm, respectively. Sulfonation could significantly increase the storage time and dispersion stability. With the increase in S/P (0.1-0.35), the storage time increased from 15 to 86 days, the sedimentation value increased from 1.927 × 104 to 5.269 × 104 mg/L, and the diameter decreased from 6.3 to 3.0 nm. This paper can present new ideas for improving the storage stability and salt tolerance of phenol-formaldehyde resin and further improving the range of its applications, which has essential reference significance.

Damping Behaviour and Mechanical Properties of Restorative Materials for Primary Teeth.

The energy dissipation capacity and damping ability of restorative materials used to restore deciduous teeth were assessed compared to common mechanical properties. Mechanical properties (flexural strength, modulus of elasticity, modulus of toughness) for Compoglass F, Dyract eXtra, SDR flow, Tetric Evo Ceram, Tetric Evo Ceram Bulk Fill, and Venus Diamond were determined using a 4-point bending test. Vickers hardness and Martens hardness, together with its plastic index (ηITdis), were recorded using instrumented indentation testing. Leeb hardness (HLD) and its deduced energy dissipation data (HLDdis) were likewise determined. The reliability of materials was assessed using Weibull analysis. For common mechanical properties, Venus Diamond always exhibited the significantly highest results and SDR flow the lowest, except for flexural strength. Independently determined damping parameters (modulus of toughness, HLDdis, ηITdis) invariably disclosed the highest values for SDR flow. Composite materials, including SDR flow, showed markedly higher reliabilities (Weibull modulus) than Compoglass F and Dyract eXtra. SDR flow showed pronounced energy dissipation and damping characteristics, making it the most promising material for a biomimetic restoration of viscoelastic dentin structures in deciduous teeth. Future developments in composite technology should implement improved resin structures that facilitate damping effects in artificial restorative materials.

Monitoring and prediction of thermal failure of high-voltage switchgear insulation materials by studying the thermodynamic properties of FR-4 epoxy resin and the characteristic gas of thermal decomposition

FR-4 epoxy resin is a common material used as internal parts in high voltage switchgear. In this paper, we adopted the accelerated thermal aging method to explore the thermal aging behavior of FR-4 epoxy resin, simulating the practical application of this material in high voltage switch. The effects of thermal aging on the thermodynamic properties and thermal decomposition characteristic gases of FR-4 epoxy resin were characterized by FT-IR, DSC, TG and GC-MS analyses. The experiment results showed that thermal aging could destroy the internal crystal structure of FR-4 epoxy resin, which could lead to this material easier to be decomposed after heating. We also detected that the thermal decomposition rate of FR-4 epoxy resin aging was greatly accelerated compared with the materials that had not been aged. In addition, unaged FR-4 epoxy resin could release 9 main volatile gases under 120°C, and irreversible defects or structural damages occurred in the materials along with the volatilization of small organic molecules. Furthermore, after continuous thermal aging at 120 °C for 672 h, the molecules of FR-4 epoxy resin were more cracked and volatilized, we observed a more obvious phenomenon of thermal decomposition in this materials. In total, we compared the types of thermal decomposition gases and the decomposion mechanism of aged and unaged FR-4 epoxy resin. In application, our results can provide reference for condition monitoring and fault prediction for this material in high voltage switchgear in the future.

Preparation and evaluation of double‐hydrophilic diblock copolymer as viscosity reducers for heavy oil

AbstractIn this work, a series of double‐hydrophilic diblock copolymers ofN‐acryloylmorpholine (NAMO) andN,N‐dialkylacrylamide are prepared as the additives for viscosity reduction, which could effectively interact with the asphaltenes and resins. The viscosity reduction effects of the types ofN,N‐dialkylacrylamide monomer (N,N‐dimethyl acrylamide &N,N‐diethyl acrylamide) and degree of polymerization (DP) of poly(N,N‐dialkylacrylamide) block in copolymers on heavy oil are tested with heavy oils with different viscosities. These viscosity reducers can work with small dosages (>25 mg L−1). The interfacial tension between oil and water is significantly weakened, and the aggregating structures of asphaltenes and resins are disassembled into smaller aggregates and covered with polymers with the addition of copolymers. The re‐establishment of aggregates among polar components seems to be prevented, and the stability of the heavy oil/water emulsions is greatly enhanced as a result. All these results provide the prerequisites for water‐soluble diblock copolymers working as viscosity reducers for various heavy oils.

Characterization and Optimization of Polymeric Bispicolamine Chelating Resin: Performance Evaluation via RSM Using Copper in Acid Liquors as a Model Substrate through Ion Exchange Method.

Advanced technologies of electronics industries have led to environmental contamination concerns, especially waste print circuit boards containing a very high concentration of copper (II) ions, which can be discharged in wastewater containing many contaminated metals. A low pH is a necessity for treating industrial wastewater containing heavy metals to meet engineering process design. A novel polymeric bispicolamine chelating resin, Dowex-M4195, was applied as an alternative for investigating the behavior of copper (II) in acidic solution via an ion exchange method in a batch experiment system. Characterization of physical and chemical properties before and after ion exchange were also explored through BET, SEM-EDX, FTIR and XRD. Response surface methodology was also applied for optimization of copper (II) removal capacity using design of experiment for selective chelating resin at a low pH. The results indicate that H+ Dowex-M4195 chelating resin had a high-carbon content and specific surface area of >64% and 26.5060 m2/g, respectively. It was predominantly macropore porous in nature due to the N2 gas adsorption isotherm and exhibited type IV with insignificant desorption hysteresis loop of H1-type. It was spherical and cylindrical. After the ion exchange process of copper (II)-loaded H+ Dowex-M4195, the specific surface area and total pore volume decreased by about 17.82% and 5.39%, respectively, as compared to H+ Dowex-M4195. Hysteresis loop, isotherm and pore size distribution were also similar. Regarding the functional group, the surface morphology and crystalline structures of H+ Dowex-M4195 showed copper (II) compound based on the structure of chelating resin that confirmed effective ion exchange behavior. The design of optimization indicated that copper (II) removal capacity of about 31.33 mg/g was achieved, which could be obtained at 6.96 h, pH of 2 (a desirable low pH), dose of 124.13 mg and concentration of 525.15 mg/L. The study indicated that the H+ Dowex-M4195 (which is commercially available on the market) can successfully be applied as an alternative precursor through the ion exchange method for further reuse and regeneration of the copper (II) in the electronic waste industries and other wastewater applications needed to respond the policy of biocircular green economy in Thailand.

Synthesis and environmental application of TTCHEA resin in effluent handling

Industrial effluents include significant amounts of heavy metals. The elimination of these ions causes great concern towards the environment. The flora and fauna of the aquatic and terrestrial environments are significantly impacted by rising levels of these metal pollutants in the environment. In order to develop new chelating resin, tamarind kernel powder was employed. TKP derivative of tertiary amine acts as metal ion exchanger cum a janitor for removal of harmful toxic metal ions from effluents of mineral and metallurgical industries. This study describes adsorption process for removal of toxic metal ions from wastewater. In dioxane medium, serine was bound to TKP backbone. The resulting ion exchange resin has been used for treatment of effluents. Interesting data were obtained showing the way in which various metal pollutants were removed throughout the depth of resin bed. FTIR methods have been used to describe the structure of the chelating resin.

Improved adsorptive purification and effective separation of acidic and lactonic sophorolipid biosurfactant

Crude Sophorolipid extract obtained from fermentation broth contains both acidic and lactonic forms of Sophorolipid with different degrees of acetylation and varying lengths of the fatty acid chains. Carboxylic end in the acidic form of the fatty acid is free, whereas in the lactonic form, it is internally esterified. Sophorolipid show different physicochemical properties with wide range of applications for each structural compound. This work represents the separation and purification strategies of acidic and lactonic Sophorolipid obtained from crude extract. Depending on structure of Sophorolipid molecule different resin were selected for screening based on % binding per ml of resin, % elution and % assay purity of the product obtained.Based on binding study, uptake kinetic, adsorption isotherm and Simchrome software results, macroporous adsorbent SEPABEADS SP 825L was selected as the choice of resin for preparative separation. Breakthrough capacity of the resin was calculated to be 37.8 and 2.801 mg/mL for lactonic and acidic SL respectively. Column study was performed to justify the previous results and 10 g of crude product was processed to obtain 4.2 and 3.9 g of acidic and lactonic SL having the assay purity of more than 90%.

Role of salinity concomitant with asphaltene and resin on the interfacial tension of ionic liquid from imidazolium family

Imidazolium-based ionic liquids have been considered environmentally friendly surfactants with display high performance in the interfacial tension (IFT) reduction. On the other hand, adjusting/tuning ions composition of the aqueous media (such as SO4−, Ca2+, and Mg2+) is an important feature in the smart water-enhanced oil recovery process. Since oil composition (particularly asphaltene and rein fractions) demonstrates the remarkable impact on the interfacial behavior of crude oil/aqueous solution, the synergetic effect between [C12mim][Cl] IL and active ions in the seawater on the IFT of various synthetic oils were evaluated. The structural properties of asphaltene and resin fraction of two crude oil with API gravity of 32.3 (oil A) and 27.5 (oil B) (through preparing six synthetic oils) and tuning ion composition (through preparing five aqueous media) at an ionic strength of seawater (IS = 0.8 M) on the performance of the IL were evaluated. The results showed a lower IFT value of synthetic oils prepared by oil A than those prepared by oil B in the presence of all studied electrolyte solutions, due to the presence of more polar heteroatoms in the structure of asphaltene and resin extracted from oil A, indicates the dominant effect of the nature of oil type on the [C12mim]Cl surface activity compared to the effect of ion type (composition of brine).

Molecular Simulations and Network Analyses of Surface/Interface Effects in Epoxy Resins: How Bonding Adapts to Boundary Conditions.

In this study, we unravel the atomic structure of a covalent resin near boundaries such as surfaces and composite constituents. For this, a molecular simulation analysis of epoxy resin hardening under various boundary conditions was performed. On the atomic level of detail, molecular dynamics simulations were employed to study crosslinking reactions and self-organization of the polymer network within nm scale slab models. The resulting structures were then coarsened into a graph theoretical description for connectivity analysis of the nodes and combined with characterization of the node-to-node vector orientation. On this basis, we show that the local bonding of epoxy resins near interfaces tends to avoid under-coordinated linker sites. For both epoxy–vacuum surface models and epoxy–silica/epoxy cellulose interfaces, we find almost fully cured polymer networks. These feature a local increase in network linking lateral to the surface/interface, rather than the dangling of unreacted epoxy groups. Consequently, interface tension is low (as compared to the work of separating bulk epoxy), and the reactivity of the resin surface appears negligible.

Crack-resistant melamine/formaldehyde-impregnated paper-decorated panels using blocked isocyanates as a temperature-responsive crosslinker

Melamine–formaldehyde (MF) resin-impregnated paper-decorated panels are prone to surface cracking, which can be reduced by changing the brittle structure of the MF resin. To increase the curing degree and toughness of the resin, a hexamethylene diisocyanate trimer blocked with methyl ethyl ketoxime (ME-HDI-tri) was used as a temperature-responsive crosslinker. This latent crosslinking agent only worked above 120 °C, which prevented it from participating in cross-linking reactions during the preparation of the impregnated paper. The chemical structures of the modified MF resins (ME-HDI-tri-MF) were characterized by Fourier-transform infrared (FTIR) spectroscopy. The curing behaviors of the MF resins were characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical thermal analysis (DMTA). Impregnated paper was prepared with ME-HDI-tri-MF, and its tensile strength and elongation at break were tested. Blockboard was prepared with ME-HDI-tri-MF, and its cracking and corrosion resistance were tested. The absorption peak of the methylene chain was observed in the FTIR spectrum of ME-HDI-tri-MF after curing, which indicated that ME-HDI-tri participated in the curing reaction of the MF resin. With the addition of ME-HDI-tri 5 %, the curing temperature of the MF resin decreased from 142 °C to 130 °C, and the ultimate tensile stress and elongation at break of the modified impregnated paper increased by 97.70 % and 86.25 %, respectively. The cracking and corrosion resistance of the decorated panel prepared with ME-HDI-tri-MF were also improved. After adding 3 % ME-HDI-tri, the surface cracking of the decorated panels was prevented, which extended the service life and broadened the application range of the decorated panels.

Effect of stoichiometry on chemical structure, dielectric and mechanical properties of epoxy resin under gamma irradiation

The chemical and physical properties of diglycidyl ethers of bisphenol-A (DGEBA)/2,2'-(ethylenedioxy) bis(ethylamine) (EDBA) epoxy resins with different stoichiometric ratios under gamma irradiation have been investigated. Fourier transform infrared (FTIR) spectroscopy results indicated that a mass of amines and oxidized carbonyl-containing products were generated during the irradiation process. Most products for amine-rich DGEBA/EDBA systems were amides. Dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) results demonstrated that chain scission predominated during irradiation for the amine-rich system, while chain cross-linking predominated for the epoxy-rich system. The dielectric relaxation behaviours indicated that the α relaxation behaviours broadened considerably with an increasing irradiation dose, demonstrating an increasing spatial heterogeneity of the crosslinked networks. The compressive yield strengths showed a monotonous linear increase with irradiation dose. However, due to the different cross-linking networks, the yield strains showed converse trends for amine-rich and epoxy-rich systems under gamma irradiation.

Analysis of Influence of Insulating Resin Paint Film on Enameled Wire Properties Based on Molecular Simulation

As one of the varieties of magnet wire, the enameled wire has excellent mechanical properties, heat resistance, ageing resistance, dimensional stability and chemical stability. This is one of the keys affecting the development of the electrical industry, especially the development of new motors. Different varieties of enameled wire insulating varnishes have advantages and disadvantages, in addition to their general properties. In order to improve the service life and reliability of the electrical coil of the motor, it is necessary to select the appropriate enameled wire reasonably according to different purposes. Molecular simulation technology can play a guiding role in the relationship between the molecular structure and properties of resins, help to understand the microscopic mechanism, shorten the experimental period, improve efficiency and save costs. In this paper, based on density functional theory (DFT) and molecular dynamics (MD), the microscopic properties of four insulating resins, polyamide–imide (PAI), polyester (PET), polyesterimide (PEI), and polyimide (PI), were studied. We also studied the influence mechanism of the insulating resin microstructure on the macroscopic properties of enameled wires, including adhesion, insulating properties and flexibility. The calculation results show that the polyester insulating enameled wire paint has good insulation performance and flexibility, the polyamide–imide paint has the best adhesion, and the polyimide insulating paint has very reliable insulation performance and flexibility. The performance research in this paper lays a foundation for the preparation of insulating resin coatings with better comprehensive properties. The performance research in this paper lays a foundation for preparing insulating resin paint with excellent comprehensive performance.

Molecular-scale investigation on relationship between thermal conductivity and the structure of crosslinked epoxy resin

Epoxy resins are widely used as matrix resins in many fields due to their excellent physical and mechanical properties. However, their low thermal conductivities restrict their applications, especially in electronic packaging. In this work, nonequilibrium molecular dynamics (NEMD) simulations were used to investigate the relationship between thermal conductivity and epoxy resin structure. Three systems, diglycidyl ether of bisphenol A (DGEBA)/4,4’-diamino diphenyl sulfone (4,4’-DDS), DGEBA/diethylene triamine (DETA), and tetraglycidyl diamino diphenyl methane (TGDDM)/4,4’-DDS, were simulated based on our previous crosslinking algorithm. The thermal conductivity of DGEBA/4,4’-DDS increased with the degree of crosslinking, which is due to increases in new thermal pathways through crosslinking bonds. The sequence of thermal conductivities was found to be TGDDM/4,4’-DDS > DGEBA/DETA > DGEBA/4,4’-DDS which was quantitatively validated with our experimental measurements, consistent with the sequence of crosslink density. To explore the microscopic mechanism governing thermal conductivity, separate heat transfer modes were investigated, revealing that the thermal conductivity contribution of bonded interactions dominates over that of non-bonded interactions for all three systems. This finding verifies that introducing crosslinking bonds dominantly contributes to higher thermal conductivity in epoxy materials. Our research provides suggestions for large scale manufacture of higher thermal conductive epoxy resins.

Establishment of interlaminar structure and crack propagation in carbon fiber reinforced epoxy composites by interleaving CNTs/PEK‐C film

AbstractThe synergistic combination of carbon nanotubes (CNTs) and thermoplastic (TP) resin has shown the large potential in the improvement of fracture resistance for the epoxy matrix composites using the interleaving toughening method in recent years. The hybrid structure of CNTs and TP resin in interlayers affects directly the interlaminar structure and the resultant crack propagation path. In this work, the CNTs and thermoplastic polyetherketone‐cardo (PEK‐C) were used to prepare the interlayer of different structures to interleave the carbon fiber reinforced epoxy composites and the influence of hybrid structure on the interlaminar structure and the fracture toughness was investigated. The results showed that compared with the PEK‐C/CNTs uniformly hybrid interlayer, the sandwich interlayer produced better toughening effect in mode I interlaminar fracture toughness (GIC). The GIC was improved by 138.1% via PEK‐C/CNTs/PEK‐C sandwich interlayer, while only 49.7% via PEK‐C/CNTs hybrid interlayer. The sandwich interlayer resulted in the formation of the multilayered structure in the interlaminar region, facilitating the tortuous crack propagation path.

Resin transfer in oil-water interface intensified by H2O2 and demulsifier for efficient water separation in tight oil

Tight oil is an important unconventional oil resource, but it is difficult to separate oil and water from produced liquid and make efficient use of it. Due to the stable structure of oil–water interface caused by resin, it is difficult to achieve demulsification. In this work, a series of polyether ester demulsifierswith different degree of polymerization were designed by esterification and polymerization. In addition, hydrogen peroxide was used to regulate the structure of resin to enhance the transmission of polyether ester, and the replacement of resin was strengthened through the structural design of polyether ester. The results showed that the molecular weight and dipole moment of resin oxidized by hydrogen peroxide decreased, which was beneficial to the transfer of demulsifier. With the increase of polymerization degree, the oil solubility and surface activity of polyether ester were improved, and the replacement ability of resin was strengthened·H2O2 and demulsifier were used to synergistically promote demulsification, the dehydration rate could be further increased to 99.2%, and the water content in tight oil could be reduced to 0.56%.