Dynamic mechanical analysis of rubber toughened epoxy resins

1985 ◽  
Vol 25 (18) ◽  
pp. 1148-1154 ◽  
Author(s):  
Z. N. Sanjana ◽  
L. Kupchella
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Epoxy Resins ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Toughened Epoxy ◽  
Rubber Toughened

A Study on the Blends of Epoxy/Polybutadiene and the Application to the Encapsulation of a Capacitor

1992 ◽  
Vol 274 ◽  
Author(s):  
Zhongyuan Ren ◽  
Liying Qui
Keyword(s):  
Phase Separation ◽  
Dynamic Mechanical Analysis ◽  
Low Temperatures ◽  
Epoxy Resins ◽  
Mechanical Analysis ◽  
Dynamic Mechanical

ABSTRACTThis paper describes the blends of epoxy/polybutadiene and the application of the blends to the encapsulation of capacitors. Experiments showed that the hydroxy-carboxyl terminated polybutadiene (HCTPB) had a good toughening effect on epoxy resins, and the blends of epoxy/HTPB or epoxy/HCTPB had good craze resistance at low temperatures. The phase separation and dynamic mechanical analysis of these blends are discussed below.

Nano-silica reinforced epoxy resin/nano-rubber composite material with a balance of stiffness and toughness

2021 ◽  
pp. 095400832098875
Author(s):  
Shuo Wang ◽  
Meng Cao ◽  
Hongqian Xue ◽  
Fanglin Cong ◽  
Xiaodong Li ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Dynamic Mechanical Analysis ◽  
Epoxy Resins ◽  
Mechanical Analysis ◽  
Silica Particles ◽  
Epoxy Composites ◽  
Nano Silica ◽  
Dynamic Mechanical ◽  
Rubber Particles

In the electronics and aerospace industries, epoxy resins are generally regarded as economical and efficient adhesives and have a high status. However, epoxy resins are highly crosslinked polymers and are very brittle adhesives where they are prone to fast crack propagation under dynamic loads. Therefore, it is very necessary to enhance the toughness of epoxy resin adhesives. Nano-rubber has been proved to be an important toughening agent for epoxy resin, which can significantly improve the fracture toughness of epoxy resin. However, increasing the toughness of epoxy resin by adding nanomaterials is often accompanied by decreasing the strength and stiffness of resin. Therefore, in this work, rigid nano-silica particles were added to improve the rigidity and tensile strength reduction caused by the addition of rubber particles. And further increase the toughness of the epoxy resin to obtain an epoxy adhesive with balanced stiffness-toughness. As a result, it can be found that the addition of silica particles can significantly improve the decrease in stiffness caused by the addition of rubber particles. For example, Young’s modulus and tensile strength are increased by 28%, and 23%, respectively, with 4% silica is added based on rubber particles. Through the single lap shear experiment, it is found that the shear strength of the epoxy/RnP/silica composite adhesive has increased, which further proves that the addition of nano-silica particles can increase the stiffness of the epoxy composite. The dynamic mechanical analysis experiment found that after adding nano-silica particles, the storage modulus of epoxy composites increased, which also shows that adding nano-silica particles can improve the stiffness of epoxy composites. Scanning electron microscopy analysis was performed to study the reinforcement mechanism of epoxy/RnP/silica composite materials. The thermal stability of epoxy composites was characterized by Dynamic mechanical analysis and thermogravimetric analysis.

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