1、Chemical Modification of Epoxy Resins
Chemical modification of epoxy resins primarily includes methods such as copolymerization modification, graft modification, and crosslinking modification.
2、Introduction to Epoxy Resin Graft Modification
epoxy resin graft modification is an effective technique for improving comprehensive performance by introducing novel functional groups or structures. Its broad industrial application potential offers new directions for epoxy resin innovation.
3、Advanced chemical modification technology of inorganic oxide
In this comprehensive review, we explored advanced chemical modification techniques tailored for IONs incorporated into EP, providing a detailed examination of the mechanical characteristics of surface cm-ION/EP nanocomposites.
硅烷偶联剂 (KH550) 和羟基硅油共同改性环氧树脂及配制富
通过两步反应法实现了硅烷偶联剂KH550和羟基硅油对环氧树脂E-20的共同改性,利用胺基加成反应引入KH550的乙氧基基团增加E-20的活性,从而提高与羟基硅油的接枝效率。 通过红外光谱、GPC测试、稳定性分析以及DSC测试研究了分步反应过程和反应物配比对改性树脂性能的影响,优化改性工艺。 研究表明,合适的反应物配比为E-20∶羟基硅油∶KH550=10∶1.5∶0.5 (质量比)。 进一步利用改性树脂配制富镁涂层,通过涂层基本性能测试、盐雾试验和老化试验,研究了涂层对铝合金的保护性能。 研究表明,涂层具有高的附着力,柔韧性好,耐盐雾和耐老化性能提高明显。
Research status of epoxy resin modification at home and abroad
Epoxy resin is a thermosetting resin material with a long history and a wide range of applications.Because of its excellent mechanical properties,dielectric properties and chemical resistance,it can be used as engineering plastics,laminates,molding materials,coatings,etc.,and has been widely applied in the high-tech fields of aerospace,vehicle ...
Effects and mechanism of graft modification on the dielectric
In this research work, enhanced permittivity was obtained by graft modification of the epoxy resin matrix. Polyethylene glycol (PEG) and chrome acetylacetonate (Cr Acac) were employed as graft modification reagents.
Research status of mechanical modification of epoxy resin
To achieve this, researchers have adopted various methods to enhance the mechanical and physical properties of epoxy resin. Epoxy resin modification is a common method and has been subject to numerous innovations in recent years.
Modification of epoxy resins with functional silanes, polysiloxanes
Epoxy resins are very important and widely used thermosetting polymers that find many practical applications. Very often their properties can be effectively modified by an addition of reactive silanes, polysiloxanes, silsesquioxanes, silica, montmorillonite, and other fillers.
(PDF) Molecular dynamics simulation of epoxy resin modified by
The dynamic evolution process and micro information in the tensile process was observed and extracted to reveal the strengthening mechanism of PI grafted GO modified epoxy resin from...
Research status of mechanical modification of epoxy resin
To achieve this, researchers have adopted various methods to enhance the mechanical and physical properties of epoxy resin. Epoxy resin modification is a common method and has been subject to numerous innovations in recent years.
Epoxy resin, as one of the high-performance materials, is widely used in fields such as electronics and electrical engineering, architectural coatings, automotive manufacturing, and aerospace due to its excellent mechanical properties, electrical insulation, chemical resistance, and dimensional stability. the molecular structure of epoxy resin limits its potential applications under specific conditions, such as performance degradation at high temperatures or in strong alkaline environments. To overcome these limitations, researchers have developed methods for grafting cyclohexamine onto epoxy resin. This paper aims to explore the principles, preparation methods, and application prospects of cyclohexamine-grafted epoxy resin.
The fundamental principle of cyclohexamine-grafted epoxy resin involves chemical reactions between cyclohexamine and epoxy resin, introducing new functional groups into the resin chains to improve its chemical and physical properties. This modification typically occurs through reactions between cyclohexamine and the hydroxyl groups of epoxy resin, forming stable cyclohexamine-modified resins. By adjusting the ratio of cyclohexamine to epoxy resin, reaction conditions, and post-processing techniques, the degree of grafting can be controlled to optimize the performance of the epoxy resin.
Various methods exist for preparing cyclohexamine-grafted epoxy resin, including solution polymerization, suspension polymerization, and emulsion polymerization. In solution polymerization, cyclohexamine is dissolved in an organic solvent, followed by the addition of an initiator to trigger the ring-opening polymerization of epoxy resin. In suspension polymerization, cyclohexamine is dispersed in a water-based medium, and polymerization is initiated. For emulsion polymerization, epoxy resin and cyclohexamine are copolymerized into an emulsion, which is then cured to form a solid resin.
Cyclohexamine-grafted epoxy resin offers several advantages. First, the introduction of cyclohexamine significantly enhances the thermal stability and alkali resistance of the resin. For example, under high-temperature conditions, cyclohexamine-grafted epoxy resin maintains better mechanical properties and electrical insulation, whereas unmodified epoxy resin degrades due to thermal decomposition. Second, the modified resin exhibits excellent corrosion resistance, maintaining stable performance in harsh environments. Additionally, the incorporation of cyclohexamine increases the viscosity of the resin, improving its applicability in coatings.
Cyclohexamine-grafted epoxy resin shows broad application potential across multiple fields. In electronics and electrical engineering, it can be used to manufacture high-performance circuit boards and encapsulation materials, enhancing product reliability and lifespan. In architectural coatings, this modified resin improves weather resistance and abrasion resistance, extending the lifespan of buildings. In automotive manufacturing, it serves as a high-performance adhesive and sealant, boosting the durability and safety of automotive components. In aerospace, the resin can be employed to fabricate structural components with high temperature resistance and mechanical strength, meeting stringent material requirements.
Despite its advantages, the preparation of cyclohexamine-grafted epoxy resin is relatively complex, costly, and requires specialized processing techniques to ensure optimal performance. reducing production costs, simplifying preparation procedures, and further improving the resin’s properties remain active research topics. With advancements in science and technology, cyclohexamine-grafted epoxy resin is expected to play a more significant role in the field of materials science.
