1、Toughening and strengthening of low
Modified co-PPEN/E51 composites have good thermal properties. This paper used phthalazinone-based copoly (biphenyl ether nitrile) (co-PPEN) to improve the low-temperature toughness of epoxy resin E51.
2、Practical Technology of Toughening Epoxy Resin (II): Modification
During the epoxy curing process, strong intermolecular forces are generated between SEP and epoxy resin, which further enhances the heat resistance of modified epoxy resins. Better insulation of epoxy resin are achieved by adding engineering plastics with fine insulation equipment.
3、Reprocessable and ultratough epoxy thermosetting plastic
Utilizing an epoxy-amine chemistry, the authors demonstrate a thermoset epoxy that is reprocessable and tough, achieving improved sustainability for this widely used plastic material.
A novel photocurable modified epoxy resin for high heat resistance
In this paper, in order to further improve the heat resistance of UV-curing epoxy cresol novolac (EOCN), 2,2-bis (hydroxymethyl)propionic acid (DMPA) was firstly introduced to open epoxy groups in EOCN and then the hydroxyl groups reacted with acryloyl chloride to make sure the resin has sufficient UV-curing double bonds.
Advances in Toughening Modification Methods for Epoxy Resins: A
Through a detailed analysis of experimental studies, this paper highlights the effectiveness of various toughening strategies and suggests future research directions aimed at further optimizing epoxy resin toughening techniques for diverse industrial applications.
The study of rubber
In this paper, a mechanism for the simultaneous improvement of heat resistance and toughness of rubber-modified epoxies was studied in detail with AFM, DSC and in situ FTIR. A novel morphology was proposed and confirmed by using CNBR-NP modified epoxies as an example.
Toward sustainable thermosets: Advances in toughening and degradation
Epoxy resins (EPs) are widely used thermosetting plastics with excellent mechanical and thermal properties. Due to their highly crosslinked network structure, EPs are relatively brittle and non-degradable.
Epoxy resins with high heat resistance and flame retardancy via a new
To develop highly heat-resistant and flame-retardant epoxy resins, the curing behavior of an epoxy resin and the properties of the resulting cured product were investigated using two compounds as c...
Research on Properties of Silicone
The effects of organosilicon modification of epoxy resin on the mechanical properties systematically discuss its heat resistance and micromorphology. The results indicate that the curing shrinkage of the resin was decreased and the printing accuracy was improved.
A rubber
In this work, carboxylic nitrile-butadiene elastomeric nanoparticles (CNB-ENPs) coated with triethanolamine (TEA) on the surface were used to modify TDE-85 epoxy resin. Surprisingly, the modified epoxy resin exhibited not only very high toughness but also very high heat resistance.
In modern industry, plastic products are widely used due to their lightweight, durability, and cost-effectiveness. with the increasing complexity of application environments and rising performance requirements, traditional thermoplastics (such as polyethylene, polypropylene, etc.) struggle to meet demands under extreme conditions. Developing modified resins with enhanced heat resistance is critical, as it not only expands product application ranges but also significantly improves economic benefits. This article explores various modification methods to enhance the heat resistance of EA plastics for broader practical applications.
I. Overview
EA plastic, or ethylene-vinyl acetate copolymer (EVA), is a commonly used thermoplastic material. It boasts excellent processability, electrical insulation, and chemical stability, making it widely applied in packaging materials, medical devices, automotive components, and other fields. its low melting point leads to softening or even melting under high-temperature conditions, limiting its use in extreme environments. developing heat-resistant modified resins is key to expanding the applications of EA plastics.
II. Modification Principles
To improve the heat resistance of EA plastics, modifications must target molecular structures by introducing specific chemical bonds or physical configurations. Common methods include:
- Crosslinking Modification: Adding crosslinking agents (e.g., peroxides, silane coupling agents) creates a three-dimensional network structure between polymer chains, enhancing thermal stability and mechanical strength.
- Filling Modification: Incorporating inorganic fillers (e.g., talc, calcium carbonate) or organic fibers (e.g., glass fibers, carbon fibers) reduces melt fluidity and increases heat resistance.
- Reinforcement Modification: Adding high-strength fibers or particles (e.g., glass fibers, carbon nanotubes) significantly raises thermal deformation temperatures and mechanical properties.
- Plasticization Modification: Adjusting molecular weight distribution or adding plasticizers lowers melting points while improving processability.
- Surface Treatment Modification: Coating surfaces with heat-resistant layers or using surface active agents reduces melt adhesion and improves high-temperature stability.
III. Practical Application Cases
In industrial production, multiple approaches have been applied to enhance EA plastic heat resistance. For example:
- A company successfully increased the melting temperature of EA plastics to above 180°C by incorporating silane coupling agents, enabling stable shape retention at higher temperatures.
- Adding glass fibers to EA plastics not only improved heat resistance but also enhanced mechanical strength and wear resistance.
Methods such as crosslinking, filling, reinforcement, plasticization, and surface treatment effectively improve the heat resistance of EA plastics. These modifications expand their application range and performance in extreme environments. Continued exploration and application of these technologies will provide a solid foundation for the widespread use of EA plastics in future industries.
