The difference between branched polyethyleneimine and linear polyethyleneimine

2025.04.27

1.Differences in molecular structure

Branched polyethyleneimine is a novel polymer material with high molecular weight and highly branched molecular structure. Compared with ordinary linear polyethyleneimine, branched polyethyleneimine has a more dispersed and complex molecular structure, with more diverse numbers and lengths of branches. Branched polyethyleneimine can be prepared by different reaction conditions, such as fluorescence probe method and ultrasonic method.

And polyethyleneimine is a linear polyethylene molecular structure with only a few branches or no branches on the molecular chain. The preparation method of polyethyleneimine is relatively simple, usually using free radical polymerization.

2.Differences in physical properties

Branched polyethyleneimine has excellent solubility and heat resistance, as well as good antioxidant and UV resistance properties. Meanwhile, branched polyethyleneimine has a larger molecular weight and higher viscosity compared to polyethyleneimine, making it more durable and long-lasting during use.

Polyethyleneimine has a high crystallinity, melting point, and glass transition temperature due to its linear molecular structure. It also has good chemical resistance and can withstand various solvents and acid-base media.

3.Differences in application fields

Branched polyethyleneimine has a wider range of applications and can play an important role in materials science, biology, medicine, and other fields. For example, it can be used as a drug sustained-release and scaffold material, as well as in chemical fields such as inks, coatings, and dyes.

Polyethylene imine also has a wide range of applications in fields such as electronics, optoelectronics, and biomedical sciences. For example, it can be used in fields such as optical thin films, solar cells, sensors, etc. The above is the difference between branched polyethyleneimine and polyethyleneimine. It can be seen that although they are both polyethyleneimine, there are significant differences in molecular structure, physical properties, and application fields.