1、Sustainable bio
The dicarboxylic acids used in this work were sebacic acid, and novel long chain dibasic acids obtained from sebacic acid and a cardanol-based epoxy resin with a different acid ratio excess.
2、Recent Development of Functional Bio
This review summarizes the research progress of functional bio-based epoxy resins in recent years.
3、Application of new modified Schiff base epoxy resins as organic
In the present study, we report on two methods for the modification of Schiff base epoxy resin in order to obtain flexible, organic coatings with very good physical and mechanical properties.
EPOXY RESINS CHEMICAL MODIFICATION BY DIBASIC ACIDS
The aim of this work is to investigate the kinetic regularities of epoxy resins modification by various dibasic carboxylic acids (aliphatic, aromatic, unsaturated ones) and suggest the...
EPOXY RESINS CHEMICAL MODIFICATION BY DIBASIC ACIDS
Kinetic regularities of epoxy resins chemical modification by aliphatic and aromatic dibasic acids have been studied. The commercial dianic resins ED-20 and ED-24 were used as epoxy resins.
Chalk resistant epoxy resins,Progress in Organic Coatings
The diglycidyl ethers of bisphenol A (DGEBPA), bisphenol F (DGEBPF) and bis 2,6-xylenol F (DGEBXF) were partially modified with various linear and aromatic dibasic acids.
THE SYNTHESIS OF MODIFIED EPOXY RESINS
Like plant oil-based epoxy resins, dimer acid-based epoxy resin also exhibits weak mechanical, dielectric, and thermal properties due to its non-aromatic structure and long side chains.
Preparation and Application of Dimer Acid Modified Epoxy Resin
Abstract: A modified epoxy resin is prepared from dimer acid (EJS), 1, 6-hexanedioldiglycidylether (1, 6-HDE) and bisphenol A type epoxy resin (E51) wherein Both EJS and 1, 6-HDE has long aliphatic flexible chain segments.
Organic
The utilization of organic-inorganic hybrid modified epoxy resin at the molecular level can enhance its anti-corrosion performance while imparting additional characteristics.
Evaluation and Improvement of Bio
Bio-based epoxy resin materials have obtained significant attention in the packaging industry due to concerns about the environmental and economic impacts of traditional petroleum-based plastics.
In the modern field of material science, epoxy resins have garnered significant attention due to their excellent mechanical properties, electrical insulation, chemical resistance, and favorable processing capabilities. their inherent brittleness limits their performance in broader applications. To overcome this limitation, scientists have proposed an innovative approach: modifying epoxy resins by introducing organic dibasic acids. This modification not only significantly enhances the toughness and impact resistance of the material but also endows it with new functional characteristics, thereby expanding its potential applications in aerospace, automotive manufacturing, electronics, and other fields.
The core of organic dibasic acid-modifited epoxy resins lies in their unique chemical structure and physical morphology. Compared to traditional epoxy groups, the carboxylic groups in organic dibasic acid molecules provide additional polar groups. These groups form cross-linking points within the resin network, strengthening its cohesion and mechanical strength. Furthermore, the introduction of organic dibasic acids may also affect the thermal stability and chemical stability of the epoxy resin, enabling it to maintain performance under extreme conditions.
The modification process typically involves uniformly dispersing organic dibasic acids within the epoxy resin matrix and employing specific curing techniques (e.g., high-temperature curing) to induce chemical reactions, resulting in a stable network structure. During this process, organic dibasic acids act as fillers to eliminate voids in the resin while promoting cross-linking density, thereby improving the overall mechanical properties of the resin.
Research has shown that optimizing the type and ratio of organic dibasic acids can further enhance the performance of modified epoxy resins. For example, organic dibasic acids containing aromatic rings or heterocycles offer greater structural diversity, imparting higher heat resistance and chemical corrosion resistance to the resin. Additionally, adjusting the molecular weight and functional group types of the dibasic acids allows for fine-tuning of properties such as toughness and hardness.
Beyond conventional high-temperature curing methods, researchers have recently explored novel modification technologies, such as solution polymerization and suspension polymerization, to achieve uniform distribution and improved reaction efficiency of organic dibasic acids in the resin. These advanced techniques not only enhance production efficiency but also help reduce costs, offering greater practicality for real-world applications.
Despite the significant potential of organic dibasic acid-modified epoxy resins, challenges remain in their widespread adoption. For instance, ensuring long-term performance stability and optimizing costs while maintaining properties require collaborative efforts between researchers and industries to drive technological advancements and innovative applications.
Looking ahead, organic dibasic acid-modified epoxy resins are poised to achieve breakthroughs in multiple domains. With continuous developments in materials technology, it is reasonable to believe that through scientific methods and innovative thinking, these modified resins will become a key force driving progress in material science.
