Unveiling Propylene Glycol: Properties, Uses, and Refrigerant Secrets скачать в хорошем качестве

Unveiling Propylene Glycol: Properties, Uses, and Refrigerant Secrets

🎥 Hello everyone! Welcome to the Glacier Coolant channel! In the last episode, we delved deep into methanol, the big brother of the alcohol family. Today, we're going to get to know its "twin brother" - propylene glycol! 🔬 Propylene glycol, known as 1,2 - propanediol in academia, is very similar to its "older brother" ethylene glycol. Both are colorless, viscous liquids, almost odorless, slightly sweet, and miscible with water, ethanol, and a variety of organic solvents. 👨‍🔬 🌟 Wide applications of propylene glycol: Industrial raw material: Used to manufacture unsaturated polyester resins. Cosmetics: In cosmetics, toothpaste, and soap, it is used as a humectant in combination with glycerol or sorbitol. Hair dyes: Used as a humidity - regulating and hair - leveling agent. Antifreeze: Plays an important role in low - temperature environments. Other uses: Also used in cellophane, plasticizers, and the pharmaceutical industry. 🔍 Today, we mainly focus on the physical and chemical properties of propylene glycol as a refrigerant: Flash point: 107.2°C, belonging to Class C. Minimum freezing point: - 51.1°C. As the concentration increases, the freezing - point temperature decreases, but 60% concentration is a limit. Once exceeded, the freezing point remains unchanged. Therefore, it is necessary to be familiar with the concentration ratio table of propylene glycol when using it. 📊 📚 In the next episode, we will explore the chemical properties of propylene glycol in depth. Stay tuned! Have you learned something? Remember to follow us, and there will be new knowledge sharing every week! 👍 🔔 Don't forget to like, subscribe, and turn on the bell to get more exciting content! 🎉 #PropyleneGlycol #ChemicalKnowledge #GlacierCoolant #ScientificExploration