1、Anhydride
For introducing flexible parts, we synthesized three types of epoxy-modified resins by reacting acid anhydride with glycidol, followed by reaction with bisphenol [F, S, or J] glycidyl ether to produce flexible modified epoxy resins.
2、改性环氧丙烯酸酯的研究进展
Abstract:Ultraviolet (UV) curable epoxy acrylate (EA) material has the excellent characteristics of high hardness, high gloss, good heat resistance, chemical corrosion resistance and so on. It...
3、The effect of anhydride categories on the properties of UV
In this study, the modified EA resin (REA) was prepared by first reacting the cyclic anhydride with 2-hydroxyethyl acrylate (HEA) to form the vinyl-containing intermediate, and then the carboxylic group formed after the ring opening of the anhydride reacted with the epoxy group of E51.
A novel bio
In this work, a bio-based anhydride curing agent EHPA was synthesized successfully via the tandem DA and hydrogenation reaction pathway, which was used to cure commercial DGEBA to produce sustainable thermosetting resin material (EEP).
Reprocessable Epoxy–Anhydride Resin Enabled by a Thermally Stable
Here, we propose to use a thermally stable liquid transesterification catalyst in epoxy–anhydride resins to solve the compatibility, volatility, and structural instability problems.
Design and Properties of Low
Considering the high viscosity and poor storage ability of the traditional epoxy prepolymer, we designed an epoxy resin formulation possessing both certain mechanical strength and fluidity.
Synthesis of acid anhydride‐modified flexible epoxy resins and
For introducing flexible parts, we synthesized three types of epoxy‐modified resins by reacting acid anhydride with glycidol, followed by reaction with bisphenol [F, S, or J] glycidyl...
Anhydride Cured Bio‐Based Epoxy Resin: Effect of Moisture on Thermal
Thus, the overall objective of the present study is to develop and optimize a thermoset based on epoxidized hemp seed oil (EHSO) and an anhydride hardener which can be applied in high-performance composites with natural fiber reinforcement.
synthesis
In this study, three types of acid anhydride - modified epoxy resins (AMERs) were synthesized to enhance epoxy matrix toughness, and an epoxy composite was prepared for performance tests.
Mechanochemical Recycling of Acid Anhydride
This study advanced the recycling of acid anhydride-cured epoxy using solid-state shear milling (S3M) technology. Through this process, the C–C backbone and C–O cross-linking bonds in epoxy resins were destroyed, generating C═O and −OH reactive groups in the reactive epoxy resin powder (REP).
Introduction In the field of advanced polymer materials, epoxy acid resin (EA) is widely utilized in high-performance composites due to its excellent physical and chemical properties. unmodified EA resin suffers from inherent brittleness, hydrophilicity, and poor thermal stability, which limit its potential applications. To address these limitations, scientists have developed anhydride-modified EA resin, a novel material that incorporates anhydride groups to significantly enhance heat resistance, mechanical strength, and chemical resistance. This article explores the preparation methods, performance advantages, and practical applications of anhydride-modified EA resin.
Preparation Methods for Anhydride-Modified EA Resin
The synthesis of anhydride-modified EA resin typically involves the following steps:
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Selection and Pretreatment of EA Resin:
- Suitable EA resins, such as bisphenol A-type, bisphenol F-type, or alicyclic EA, are chosen for their high epoxide content and chemical stability.
- Pretreatment includes drying the resin to remove moisture, ensuring stability during subsequent reactions.
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Synthesis of Anhydrides:
- Anhydrides, critical for modification, are synthesized via acylation reactions, where alcohols react with carbon monoxide to form anhydrides (e.g., ethanol + CO → oxalic anhydride).
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Reaction Between Anhydride and EA:
- The pretreated EA resin is mixed with synthesized anhydride and heated.
- Anhydride groups react with hydroxyl groups in EA, forming ether or other chemical bonds. Reaction conditions (temperature, time, anhydride dosage) critically influence product performance.
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Post-Processing:
- Unreacted anhydride and byproducts are removed via washing and drying.
- Viscosity and rheological properties of the resin are adjusted for specific applications.
Performance Advantages of Anhydride-Modified EA Resin
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Enhanced Thermal Stability: The introduction of anhydride groups raises the thermal decomposition temperature, enabling stable performance at elevated temperatures.
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Improved Mechanical Strength: Tensile strength, hardness, and overall mechanical properties are significantly enhanced, making the material suitable for structural and functional components.
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Chemical Resistance: Resistance to solvents, acids, alkalis, and other chemicals is strengthened, expanding applicability in harsh environments.
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Dimensional Stability: Superior stability under long-term use or extreme conditions reduces deformation risks.
Practical Applications
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Aerospace:
- Used in aeroengine components (e.g., turbine blades) and spacecraft seals, where ultra-high heat resistance and mechanical strength are required.
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Automotive Industry:
- Applied in brake systems, engine parts, and structural components to improve safety and durability.
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Electronics:
- Employed in encapsulation materials for electronics and circuit board adhesives to enhance reliability and lifespan.
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Construction:
- Utilized in reinforcing materials and waterproof coatings to boost building durability and safety.
Anhydride-modified EA resin overcomes the limitations of unmodified EA by incorporating anhydride groups, offering superior thermal stability, mechanical properties, and chemical resistance. Its versatility and reliability make it a promising material for high-tech applications, particularly in aerospace, automotive, electronics, and construction. As technology advances and demands grow, anhydride-modified EA resin is poised to play a larger role in future innovations.
