1、Mechanochemical Recycling of Acid Anhydride
Abstract Epoxy resin (EP) is a widely used thermosetting resin. However, its cross-linked structure poses a big challenge for recycling into value-added products. This study advanced the recycling of acid anhydride-cured epoxy using solid-state shear milling (S3M) technology.
2、Alcohol degradation of anhydride
In view of the lack of research on the degradation and reuse of epoxy resins for electrical equipment, this study investigates the degradation and reuse of epoxy resins under alcoholysis conditions, and proposes innovative ideas and methods for the sustainable development of epoxy resins.
3、Review of Acid Anhydride Cured Degradable Epoxy Resins
为响应国家循环经济战略导向，文中系统综述了可降解酸酐固化环氧树脂的研究进展，重点围绕酯交换催化动态重塑、动态共价键构建及生物基改性三大技术路径，全面评析物理、化学及其他回收技术的优势与局限。
4、Journal of Applied Polymer Science
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.
5、Recycling of Anhydride
In this paper, chemical degradation of ACER by alcoholysis reaction is realized under mild conditions, and the degraded epoxy resin (DER) is utilized to replace part bisphenol A (BPA) to prepare new epoxy resins.
Mechanochemical Recycling of Acid Anhydride
Epoxy resin (EP) is a widely used thermosetting resin. However, its cross-linked structure poses a big challenge for recycling into value-added products. This study advanced the recycling of acid anhydride-cured epoxy using solid-state shear milling (S3M) technology.
Efficient recycling of anhydride
Systematic investigation of synthesis processes for novel epoxy resins by adjusting the recycled resin content. The accumulation of resin-based electrical waste poses significant resource wastage and environmental challenges, with chemical recycling representing a key solution.
(PDF) Curing epoxy resins with anhydrides. Model
In the present work, a commercial epoxy based on epoxy anhydride and tertiary amine was modified by a metallic catalyst (Zn2+) to induce vitrimeric behavior by promoting the...
The Unique Benefits of Anhydride Curing in Epoxy Resins
Selecting the right curing agent requires a methodical approach, considering factors such as performance targets, curing time and temperature, formulation cost, stability, handling challenges, and—most importantly—health and safety concerns.
Mechanochemical Recycling of Acid Anhydride
Fig. S7. Mechanical properties of REP/EP composites: (a) stress−strain curves, (b) Tensile strength of REP-20 powder is added to MHHPA-cured epoxy resin at 5% addition, (c) Flexural strength of REP-20 was added to MHHPA-cured epoxy resin in varying amounts, (d) REP powder is added to 593-cured epoxy resin at 5% addition,
In modern industry, epoxy resins, as high-performance thermosetting materials, are widely used in fields such as electronics and electrical appliances, automotive manufacturing, and aerospace due to their excellent physical and chemical properties. Among these, acid anhydride curing agents have become an indispensable component of epoxy resin systems due to their unique curing mechanisms. This article explores the fundamentals of acid anhydride-cured epoxy resins, including their composition, characteristics, advantages, and challenges in practical applications.
I. Overview of Acid Anhydride Cured Epoxy Resins
Acid anhydride curing agents are catalysts that promote the curing reaction of epoxy resins. They react with the hydroxyl groups in epoxy resins through addition reactions, forming stable ester bonds. This accelerates the crosslinking process of the resin, enhancing its mechanical strength and thermal resistance. This curing method typically involves minimal viscosity changes and fast curing speeds, making acid anhydride curing agents particularly advantageous for high-performance applications.
II. Types and Selection of Acid Anhydride Curing Agents
Based on their origin and structure, acid anhydride curing agents can be classified into aliphatic, aromatic, and heterocyclic types. Each type has specific applications and characteristics. For example, aliphatic acid anhydrides offer better low-temperature curing properties and cost-effectiveness, while aromatic acid anhydrides provide higher thermal stability and mechanical strength. The selection of acid anhydride curing agents depends on factors such as curing speed, mechanical performance, and heat resistance required for specific applications.
III. Composition and Characteristics of Epoxy Resins
Epoxy resins are high-molecular-weight compounds synthesized from polyphenols or polyaldehydes and epichlorohydrin through ring-opening polymerization. They exhibit excellent chemical stability, electrical insulation, moisture resistance, and wear resistance, as well as strong adhesive properties. The molecular structure of epoxy resins allows them to form three-dimensional network structures after curing, improving mechanical strength and fatigue resistance. they also have drawbacks, such as significant volume shrinkage during curing and sensitivity to humidity.
IV. Applications of Acid Anhydride Curing Agents in Epoxy Resins
Acid anhydride curing agents play a critical role in the curing process of epoxy resins. They significantly increase the curing rate, shorten production cycles, and reduce costs. Additionally, they improve mechanical properties, such as compressive and tensile strength, hardness, and wear resistance. In practice, acid anhydride curing agents are used to manufacture high-performance composites and specialty coatings for demanding applications.
V. Challenges and Future Development of Acid Anhydride Curing Agents
Despite their advantages, acid anhydride curing agents face challenges in practical use. For instance, their relatively high cost may limit large-scale industrial adoption. Environmental concerns, such as the emission of hazardous gases and waste byproducts, also pose challenges. Developing eco-friendly acid anhydride curing agents has become a focus of current research.
acid anhydride-cured epoxy resins hold broad application prospects in many fields as novel high-performance materials. By selecting appropriate acid anhydride types and optimizing formulations, the performance of epoxy resins can be further enhanced to meet diverse application needs. addressing challenges related to cost and environmental impact remains essential. Future research must continue exploring innovative solutions to advance the development and application of acid anhydride-cured epoxy resin technology.
