1、Investigation of hydroxyl
In this study, epoxy resin (EP-51) was modified using hydroxyl-terminated polydimethylsiloxane (HTPDMS), which possesses a low surface energy due to its -Si-O- bonds, to improve the hydrophobicity and toughness of the coating.
2、Research on Properties of Silicone
A kind of organosilicon intermediate was prepared using isophorone diisocyanate (IPDI), hydroxyl silicone oil (HSO), and hydroxyethyl acrylate (HEA). The organosilicon modification of epoxy resin was realized by introducing a −Si–O– group into the side chain of epoxy resin by chemical grafting.
3、Effects of Phase Structure Regulation on Properties of Hydroxyl
Modification of AG80 epoxy resin was performed using hydroxy-terminated polyphenylpropylsiloxane (Z-6018) and a self-synthesized epoxy compatibilizer (P/E30) to regulate the phase structure of the modified resin, achieving a synergistic enhancement in both strength and toughness.
4、Mechanical and dielectric properties of epoxy resin modified
In the present study, hydroxyl-terminated polybutadiene (HTPB) liquid rubber was employed to modify epoxy resin using 2,4,6-tri (dimethylaminomethyl) phenol as a catalyst, and methyl hexahydrophthalic anhydride as a curing agent.
硅烷偶联剂 (KH550) 和羟基硅油共同改性环氧树脂及配制富
Epoxy resin (E-20) was co-modified by silane coupling agent (KH550) and hydroxyl silicone oil through a two-step reaction process. The ethoxy group (coming from KH550) was introduced into E-20 by addition reaction of primary amine to increase the activity, thereby the grafting efficiency of E-20 with hydroxyl silicone oil was improved.
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 PHENOLIC HYDROXYL
Phenolic hydroxyl-terminated polysiloxanes were incorporated into epoxy resins to reducethe internal stress owing to the mismatch in coefficient of thermal expansion (CTE).Polysiloxane-epoxy resin block copolymers were made by a pre-reaction step prior to thecuring.
Enhanced mechanical and dielectric properties of an epoxy resin
The mechanical and dielectric properties of the blends are investigated to explore the feasibility of the modified epoxy resin as a packaging material for advanced circuits, and to seek the formulation for the optimized performance.
Preparation and study of modified epoxy resin super
Abstract: To simplify the preparation process of super-hydrophobic coatings and improve its wear resistance, the bisphenol A epoxy resin is modified in two steps with hydroxyl-terminated...
Modification and compatibility of epoxy resin with hydroxyl
These four types of PU prepolymers were used to modify the epoxy resin with 4,4′-diamino-diphenyl sulfone as a curing agent. From the experimental results, it was shown that the values of fracture energy, GIC, for PU-modified epoxy were dependent on the macroglycols and the coupling agents.
In the vast field of modern materials science, epoxy resin stands out as a high-performance thermosetting polymer, widely utilized in aerospace, automotive manufacturing, electronics, and construction due to its excellent mechanical properties, electrical insulation, and chemical stability. the inherent brittleness of epoxy resin limits its application under extreme conditions. To address this limitation, researchers have proposed hydroxyl modification as a method to enhance its performance. Hydroxyl modification not only improves the material’s toughness and impact resistance but also introduces functional groups to meet specific application requirements. This paper explores the principles, methods, and practical effects of hydroxyl-modified epoxy resin.
The core of hydroxyl modification lies in incorporating hydroxyl groups (-OH) into the molecular structure of epoxy resin to form new chemical bonds or alter its chemical properties. Multiple approaches can achieve this, such as directly adding hydroxyl compounds, copolymerizing with hydroxyl-containing monomers, or introducing hydroxyl groups during the curing process. Each method has distinct advantages and disadvantages, and the choice depends on specific application scenarios and performance requirements.
Direct addition of hydroxyl compounds is a straightforward and effective method. It involves mixing hydroxyl compounds with epoxy resin and curing under appropriate conditions. While this approach allows precise control over hydroxyl content, it may compromise the resin’s mechanical properties and electrical insulation.
Copolymerization with hydroxyl-containing monomers, such as epichlorohydrin or glycidyl acrylate, is another common technique. By integrating these monomers into the synthesis of epoxy resin, toughness and impact resistance are significantly improved. strict reaction condition control is required to avoid byproduct formation.
Introducing hydroxyl groups during curing is also widely practiced. This method enhances resin flexibility after curing but raises concerns about environmental impact and cost.
Hydroxyl-modified epoxy resin demonstrates remarkable performance in practical applications. For instance, it substantially improves impact resistance, enabling use in harsher environments. Additionally, the modification endows the resin with superior electrical insulation and chemical resistance, making it ideal for electronics and automotive industries.
Despite its benefits, hydroxyl modification faces challenges. First, it may reduce certain physical and chemical properties, such as hardness, heat resistance, and mechanical strength. Second, higher costs compared to unmodified resin could limit large-scale adoption. Furthermore, environmental pollution and health risks associated with some modification processes warrant attention.
hydroxyl modification of epoxy resin holds broad application prospects. Through rigorous research and optimized methods, its performance can be further enhanced to meet evolving industrial demands. Addressing challenges proactively will enable hydroxyl modification to play a greater role in advancing epoxy resin applications, contributing more significantly to societal progress.
