1、Preparation and curing properties of waterborne epoxy emulsified
The objective of this paper is to investigate the effect of DMP-30 on the curing rate and mechanical properties of waterborne epoxy emulsified asphalt (WEREA).
2、Study on the Room
A systematic analysis was conducted on an epoxy resin system modified with HDI trimer and PEG200 and cured using DMP-30 as a curing agent. Non-isothermal DSC testing revealed a distinct double-peak exothermic characteristic in this system, which elucidates the mechanism by which DMP-30 promotes epoxy curing [20, 21], Figure 7 shows the DSC ...
3、Effects of DMP
Effects of different DMP-30 contents on viscosity-time characteristics, curing kinetics and mechanical properties of DMP-30/E-44/MeTHPA blend system were studied by means of...
4、Recyclable High
In this paper, 2,4,6-tris (dimethylaminomethyl)phenol (DMP-30) is incorporated into the epoxy-glutaric anhydride (GA) system to prepare high-performance epoxy resins that can be recycled below 200 °C at ordinary pressure via ethylene glycol (EG) participated transesterification.
5、Effects of DMP
The results indicate that the apparent activation energy and reaction temperature of DMP-30/E-51/MA systems decrease with the increase of DMP-30, and the curing process of the curing...
AC impedance function of electrochemical working station as
Experimental results showed that DMP-30 has significant influence on reaction rate of the curing system, and the resin system, containing 1.5wt% DMP-30 can be cured completely in the shortest time at 80°C.
Preparation and curing properties of waterborne epoxy
The objective of this paper is to investigate the effect of DMP-30 on the curing rate and mechanical properties of waterborne epoxy emulsified asphalt (WEREA).
The effect of epoxy resin and curing agent groups on mechanical
The effects of the type of curing agent and the position of the epoxy functional groups on the mechanical properties of the crosslinking systems were analyzed, which may provide guidance for synthesizing epoxy resin systems with excellent mechanical properties.
Effect of Curing Agent Type on Curing Reaction Kinetics of Epoxy Resin
In this paper, low molecular weight polyamides, aromatic amines and anhydrides were selected as three kinds of curing agents and their isothermal viscosity-time properties were studied to...
Preparation and curing properties of waterborne epoxy emulsified
In this work, a multi-scale approach with different analytical methods is applied to study the curing process and the structural properties of a diglycidyl ether of bisphenol A (DGEBA) epoxy...
Epoxy curing agents, as critical components in epoxy resin systems, directly influence the curing effectiveness, mechanical properties, and durability of epoxy resins. Among numerous epoxy curing agents, DMP30 has garnered significant attention due to its excellent performance. This paper explores the impact of DMP30 epoxy curing agent on the glass transition temperature (Tg) of epoxy resins.
1. Introduction to DMP30 Epoxy Curing Agent
DMP30 is a high-performance organic acid anhydride curing agent characterized by low volatility, high reactivity, and robust chemical stability. It rapidly initiates reactions within epoxy systems, promoting cross-linking and curing of the resin, thereby enhancing mechanical strength and thermal resistance. DMP30 is widely used in aerospace, automotive manufacturing, electronics, and other fields, serving as a vital material for achieving high-performance composites.
2. Definition and Role of Tg
Tg (glass transition temperature) is a key parameter for thermosetting resins, representing the temperature range during which a resin transitions from a liquid to a solid state. Tg reflects the thermal stability of the resin and correlates closely with its mechanical and electrical insulating properties. For epoxy resins, a lower Tg indicates better thermal stability, enabling the material to maintain its properties at higher temperatures—a critical requirement in industries such as aerospace, where material performance is rigorously demanding.
3. Impact of DMP30 Epoxy Curing Agent on Tg
a. Enhancing Tg
DMP30 exhibits high reactivity, accelerating the cross-linking reactions of epoxy resins and significantly raising Tg. Studies show that epoxy systems cured with DMP30 typically achieve Tg values 20°C or higher than uncured systems. This improvement arises from DMP30’s ability to efficiently promote the formation of a cross-linked network, strengthening intermolecular forces and stabilizing the three-dimensional structure at lower temperatures.
b. Reducing Tg
While DMP30 generally increases Tg, scenarios requiring enhanced toughness or flexibility may necessitate Tg reduction. This can be achieved by adjusting DMP30 dosage or combining it with other curing agents. For instance, increasing DMP30 dosage further elevates Tg, whereas adding catalysts to modulate curing kinetics can lower Tg, balancing flexibility and performance.
DMP30 epoxy curing agent exerts a profound effect on the Tg of epoxy resins. Practical applications require careful selection of DMP30 dosage and formulation to optimize performance, while ensuring compatibility with other components and mitigating environmental impacts. Proper implementation ensures the final product meets targeted performance criteria.
