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[Chemical Knowledge]：Reveal the three major differences of propylene glycol, you must not know the little common sense

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Propylene glycol, the full name of propylene glycol glycerol, is a common organic solvent and polymer precursor. It is a colorless, odorless and non-toxic liquid, which has a wide range of uses in various fields. Today, we are going to reveal the three major differences of propylene glycol to help you more fully understand its characteristics and uses.

the difference between propylene glycol and ethylene glycol. Ethylene glycol is a kind of ether alcohol, which is commonly used in the manufacture of solvents and coolants. Propylene glycol, on the other hand, is a trihydric alcohol with high solubility and thermal stability and is therefore more commonly used in the synthesis of polymers. In addition, due to the poor water solubility of propylene glycol, it is more suitable for some applications requiring higher barrier properties.

the difference between propylene glycol and butylene glycol. Butanediol is a tetrahydric alcohol used as an important raw material for coatings, adhesives and plastics. The main difference in molecular structure between propylene glycol and butylene glycol is the length of the carbon chain, which causes them to differ in physicochemical properties. Due to the longer carbon chain length, butanediol has a stronger affinity for water and greater solubility. The shorter carbon chain of propylene glycol makes it more suitable for use as a quick-drying agent, softener and plasticizer.

the difference between propylene glycol and glycerin. Glycerol is a trihydric alcohol, which is widely used in medicine, food and cosmetics. Propylene glycol and glycerin are very similar in molecular structure, but propylene glycol has a lower viscosity and a higher boiling point than glycerin. Thus, propylene glycol is preferred in some applications where lower viscosity is desired.

In summary, there is a significant difference between propylene glycol and other substances. It is more commonly used with ethylene glycol in synthetic polymers and barrier applications, has a shorter carbon chain than butanediol, is suitable for use as a quick-drying agent and softener, and has a lower viscosity and higher boiling point than glycerol. By understanding these differences, we can better select and apply propylene glycol, so as to play its excellent performance and characteristics.

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