1、Studies on the Modification of Commercial Bisphenol
This research shows that a small number of multifunctional epoxy systems, both di- and tri-functional, can significantly increase tensile strength (14%) over neat DGEBA while having no negative impact on other mechanical properties including glass transition temperature and elastic modulus.
2、Equol
EEU-DDS has suitable curing activity and good processability, similar to that of commercial epoxy resin. EEU-DDS has excellent flame retardancy and its flame retardancy mechanism was discussed.
3、Simultaneously cured diglycidyl ethers of bisphenol A and polyethylene
The two resins used included the well-known diglycidyl ether of bisphenol A (DGEBPA) with relatively rigid molecular structure and a diglycidyl ether derived from a popular polymer, polyethylene glycol (PEG), with loose molecular structure (DGEPEG).
4、Modification of bisphenol a type epoxy resin by biobased magnolol epoxy
The results showed a dual modification effect of DGEM on the toughening and strengthening of E44 epoxy resin.
Bio
The result of this work demonstrates that diglycidyl ethers of n -alkyl diphenolates represent a new family of biobased liquid epoxy resins that, when cured, have similar properties to those from DGEBA.
Diglycidyl Ether of Bis
Among epoxies, the diglycidyl ether of bisphenol-A (DGEBA) is the frequently used epoxy resin. It exhibits low contraction during curing, appreciable fluidity and simplicity of processing. DGEBA is of vital importance and focus of interest in electronics and aerospace industries.
Diglycidyl Ether Of Bisphenol A (DGEBA) Based Epoxy Sizing Agent
Epoxy sizing with sizing composition, comprising of DGEBA derivative, polysiloxanes and esters, is surmised to improve the compatibility of CFs with resin matrices. In all the carbon CFs examined the sizing composition comprised of DGEBA derivative with poly organosiloxanes.
Studies on the Modification of Commercial Bisphenol
This research shows that a small number of multifunctional epoxy systems, both di- and tri-functional, can significantly increase tensile strength (14%) over neat DGEBA while having no negative impact on other mechanical properties including glass transition temperature and elastic modulus.
Toughness and strength improvement of diglycidyl ether of
Four kinds of variety molecular weight and epoxy equivalent weight HTDE as modifiers in the diglycidyl ether of bisphenol-A (DGEBA) amine systems are discussed in detail.
Bio
In this review, first, the elements leading to toxicity of BPA are explained and then thorough accounts of possible bio-sourced aromatic alternatives to BPA are gathered. The reported synthetic routes for each of these alternatives and their toxicity are described.
In the rapid development of modern industry, materials science plays a pivotal role. With advancements in technology, increasing demands are being placed on material properties, particularly in terms of wear resistance, strength, and thermal stability. Bisphenol A diglycidyl ether (DGEBA), as a high-performance thermosetting resin, has been widely utilized in electronic encapsulation, composite materials, and wear-resistant coatings due to its excellent physicochemical properties. to further expand its application scope and enhance performance, researchers have begun exploring the modification of DGEBA using resin abrasives.
Resin abrasive modification is a technique that combines abrasive particles with a resin matrix. By adjusting the type, size, distribution, and interface characteristics of the abrasives with the resin matrix, this approach can significantly improve critical performance indicators such as mechanical properties, wear resistance, and chemical resistance. This modification not only enhances the material's mechanical strength but may also improve its anti-wear capabilities, extend service life, and reduce maintenance costs.
Firstly, the selection of resin abrasives is crucial to the success of the modification. Common resin abrasives include silicon carbide (SiC), aluminum oxide (Al₂O₃), and zirconium oxide (ZrO₂). These abrasives exhibit high hardness and good chemical stability, maintaining their structural integrity and sharpness under extreme conditions. The choice of abrasive depends on the application environment and desired performance requirements. For instance, in applications demanding exceptional wear resistance, harder abrasives like SiC may be more suitable.
Secondly, the size and shape of the abrasives significantly impact the modification effects. Larger abrasive particles typically provide greater cutting forces, aiding in defect removal but may increase stress concentration. Smaller particles distribute more uniformly within the resin matrix, reducing stress concentration but offering lower removal efficiency. Additionally, the shape of the abrasives affects their dispersion in the resin. Spherical or near-spherical abrasives disperse more easily, whereas irregularly shaped ones may create stress concentration points.
Furthermore, the distribution method of abrasives plays a decisive role in the final product's performance. Common methods include dry and wet processes. The dry method involves physically mixing abrasives with resin followed by shaping, while the wet method suspends abrasives in water and deposits them onto the resin surface using specialized molds. Different distribution methods influence the bonding between abrasives and resin, thereby affecting the mechanical properties and durability of the final product.
Lastly, precise control over the modification process is essential. This includes parameters such as abrasive loading, mixing time, and curing conditions. Excessive abrasive addition can embrittle the resin matrix, compromising mechanical properties. improper curing conditions may lead to unstable material performance. accurate control of these parameters is key to achieving high-quality modifications.
resin abrasive modification technology presents new development opportunities for high-performance resins like DGEBA. By carefully selecting abrasive types, sizes, shapes, and distribution methods, along with precise process control, comprehensive improvements to DGEBA materials can be realized, meeting more demanding application requirements. Looking ahead, as materials science continues to advance, resin abrasive modification technology will drive innovation, contributing significantly to human progress.
